Type 3c Diabetes: The Misdiagnosed Condition and How to Manage It

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A Faith-Based, Evidence-Driven Guide to Living Well with Pancreatogenic Diabetes

⚠️ CRITICAL: You May Have Been Misdiagnosed

If you’ve been told you have “Type 2 diabetes” but your diabetes came on suddenly after:

  • Pancreatitis (even one episode)
  • Pancreatic surgery or trauma
  • Diagnosis of cystic fibrosis
  • Chronic abdominal pain with digestive issues

You may actually have Type 3c diabetes—and the treatment is completely different.

Research shows that Type 3c diabetes is commonly misdiagnosed as Type 2 diabetes and affects approximately 5-10% of people with diabetes but is often misclassified due to its unique clinical and metabolic features.

This isn’t just a labeling issue. Getting the right diagnosis could be the difference between effective management and dangerous complications.

What Is Type 3c Diabetes?

Type 3c diabetes, historically described as pancreatogenic or pancreatogenous diabetes mellitus, occurs because of a variety of exocrine pancreatic diseases with varying mechanisms of hyperglycemia, with the most commonly identified causes being chronic pancreatitis, pancreatic ductal adenocarcinoma, haemochromatosis, cystic fibrosis, and previous pancreatic surgery.

Think of it this way: Your pancreas is like a dual-purpose factory.

  • Exocrine function: Makes digestive enzymes (lipase, amylase, proteases)
  • Endocrine function: Makes hormones (insulin and glucagon)

Type 3c diabetes happens when physical damage to the pancreas destroys both functions.

The Critical Difference

Feature

Type 2 Diabetes

Type 3c Diabetes

Cause

Insulin resistance + beta cell dysfunction

Physical pancreatic damage

Reversible?

YES (with weight loss)

NO (tissue damage is permanent)

Digestive issues

Rare

Common (fatty stools, bloating)

Weight

Often overweight

Often normal/underweight

Glucagon

Usually normal

Deficient (high hypoglycemia risk)

Treatment

Lifestyle changes may be enough

Requires specialized management

Source: Hart PA, et al. “Type 3c (pancreatogenic) diabetes mellitus secondary to chronic pancreatitis and pancreatic cancer.” Lancet Gastroenterology & Hepatology 2016;1(3):226-237.
https://pmc.ncbi.nlm.nih.gov/articles/PMC5495015/

Common Causes of Type 3c Diabetes

Type 3c diabetes refers to diabetes due to impairment in pancreatic endocrine function related to pancreatic exocrine damage due to acute, relapsing and chronic pancreatitis (of any etiology), cystic fibrosis, hemochromatosis, pancreatic cancer, and pancreatectomy, and as well rare causes such as neonatal diabetes due to pancreatic agenesis.

Most Common Causes

  1. Chronic Pancreatitis (78.5% of cases)
  • Alcohol-related (most common)
  • Hereditary/genetic
  • Autoimmune
  • Idiopathic (unknown cause)

Source: Ewald N, Kaufmann C, et al. “Prevalence of diabetes mellitus secondary to pancreatic diseases (type 3c).” Diabetes & Metabolism Research and Reviews 2012;28(4):338-342.
https://pubmed.ncbi.nlm.nih.gov/22121010/

  1. Acute Pancreatitis
  • American Diabetes Association recommends screening people for diabetes within 3-6 months following an episode of acute pancreatitis and annually thereafter
  • Even one severe episode can trigger Type 3c diabetes
  1. Pancreatic Cancer
  • Diabetes may appear before cancer diagnosis
  • Often the first warning sign
  1. Pancreatic Surgery/Trauma
  • Partial or total pancreatectomy
  • Surgical trauma during other procedures
  1. Cystic Fibrosis
  • More than 35% of adults living with CF have Type 3c diabetes, also called CF-related diabetes (CFRD)
  1. Hemochromatosis
  • Iron overload damages pancreas

Source: American Diabetes Association Professional Practice Committee. “2. Diagnosis and Classification of Diabetes: Standards of Care in Diabetes—2025.” Diabetes Care 2025;49(Supplement_1):S27.
https://diabetesjournals.org/care/article/49/Supplement_1/S27/163926

How To Know If You Have Type 3c (Not Type 2)

Self-Assessment Checklist

Answer these questions honestly:

History Questions:

  • Did your diabetes appear suddenly after pancreatitis, pancreatic trauma, or surgery?
  • Do you have a history of chronic pancreatitis?
  • Have you been diagnosed with cystic fibrosis?
  • Do you have hemochromatosis?
  • Have you had part or all of your pancreas removed?

Digestive Symptoms:

  • Do you have frequent fatty, oily stools that float or are hard to flush?
  • Do you have chronic diarrhea or loose stools?
  • Do you experience bloating, gas, or abdominal discomfort after meals?
  • Have you lost weight unintentionally?
  • Do you have chronic abdominal pain?

Blood Sugar Pattern:

  • Do your blood sugars swing wildly from very high to very low?
  • Have you had severe hypoglycemic episodes (blood sugar <70 mg/dL)?
  • Does your blood sugar drop dangerously even with small insulin doses?

If you checked 3+ boxes in any category, request Type 3c testing from your doctor.

The Ewald-Bretzel Diagnostic Criteria

In the only published criteria for type 3c diabetes, Ewald and Bretzel proposed the following major criteria (all must be present): exocrine pancreatic insufficiency (by monoclonal faecal elastase-1 testing or direct function tests), consistent pancreatic abnormalities on imaging (endoscopic ultrasound, MRI, or CT scan), and absence of related autoimmune markers of type 1 diabetes.

Major Criteria (ALL must be present):

  1. Exocrine Pancreatic Insufficiency
  • Fecal elastase-1 test: <200 μg/g stool indicates insufficiency
  • OR direct pancreatic function testing
  • This measures whether your pancreas makes digestive enzymes
  1. Pancreatic Imaging Abnormalities
  • CT scan, MRI, or endoscopic ultrasound showing:
    • Calcifications
    • Atrophy (shrinkage)
    • Ductal changes
    • Structural damage
  1. Absence of Type 1 Diabetes Markers
  • Negative for:
    • Anti-GAD antibodies
    • Anti-IA-2 antibodies
    • Anti-ZnT8 antibodies
  • This rules out autoimmune diabetes

Minor Criteria (supportive evidence):

  1. Impaired Beta-Cell Function
  • Low C-peptide levels (indicates reduced insulin production)
  • Patients with T3cDM had lower C-peptide levels than patients with T2DM, but higher than those with T1DM
  1. No Excessive Insulin Resistance
  • Normal HOMA-IR score
  1. Impaired Incretin Secretion
  • Low GLP-1 or pancreatic polypeptide
  1. Fat-Soluble Vitamin Deficiencies
  • Low vitamins A, D, E, K
  • Rates of between 1% and 16% for vitamin A deficiency, 33% and 87% for vitamin D deficiency, 2% and 27% for vitamin E deficiency, and 13% and 63% for vitamin K deficiency have been reported in studies on chronic pancreatitis

Sources:

Tests Your Doctor Should Order

Essential Tests:

  1. Fecal Elastase-1
  • Simple stool test
  • <200 μg/g = pancreatic insufficiency
  • Cost: $50-150
  1. Pancreatic Imaging
  • CT scan or MRI of abdomen/pancreas
  • Looks for structural damage
  • May need endoscopic ultrasound (EUS) for better detail
  1. Diabetes Autoantibody Panel
  • Anti-GAD
  • Anti-IA-2
  • Anti-ZnT8
  • Rules out Type 1 diabetes
  1. C-Peptide Level
  • Measures insulin production
  • Fasting test preferred
  1. Vitamin Levels
  • Vitamin D (25-hydroxyvitamin D)
  • Vitamin A
  • Vitamin E
  • Vitamin K
  • Magnesium, zinc
  1. HbA1c
  • Shows average blood sugar over 3 months
  • Recent research has shown that patients with T3cDM have higher estimated HbA1c and blood glucose levels but do not have higher glucose variability compared to those with T1DM and T2DM, and HbA1c levels may not accurately reflect glycemic fluctuations

Source: Valente R, et al. “The Challenge of Type 3c Diabetes: From Accurate Diagnosis to Effective Treatment.” JCEM Case Reports 2025;3(7):luaf109.
https://academic.oup.com/jcemcr/article/3/7/luaf109/8139714

Why Type 3c Requires Different Treatment

The Triple Challenge

Type 3c diabetes is uniquely difficult because of three simultaneous problems:

Problem 1: Insulin Deficiency

  • Destroyed beta cells can’t make insulin
  • Blood sugar rises dangerously

Problem 2: Glucagon Deficiency

  • Destroyed alpha cells can’t make glucagon
  • Body can’t raise blood sugar when it drops
  • Result: Severe, prolonged hypoglycemia

Problem 3: Digestive Enzyme Deficiency

  • Can’t digest fats, proteins, carbs properly
  • Leads to malnutrition, vitamin deficiencies, weight loss

The pathogenesis of T3cDM is ultimately due to decreased insulin secretion, and impaired counterregulation due to deficient glucagon secretion, blunted catecholamine response, and impaired activation of hepatic gluconeogenesis result in glycemic instability with hypoglycemic reactions.

This combination creates “brittle diabetes”—wildly unpredictable blood sugars.

Source: Makuc J. “Management of pancreatogenic diabetes: challenges and solutions.” Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy 2016;9:311-315.
https://pmc.ncbi.nlm.nih.gov/articles/PMC5003514/

Evidence-Based Management Protocol

Component 1: Pancreatic Enzyme Replacement Therapy (PERT)

This is NON-NEGOTIABLE. It’s not optional.

PERT may be needed for people with chronic pancreatitis, pancreatic surgery, older age, cystic fibrosis, pancreatic cancer, and diabetes, and taking PERT correctly involves a doctor determining the right dose, taking with the first bite of foods, and changing the amount of enzymes based on the size of the meal and how much fat is in it.

How PERT Works

Pancreatic enzymes (PERT) are derived from porcine (pig) pancreas and contain:

  • Lipase: Digests fats
  • Amylase: Digests carbohydrates
  • Protease: Digests proteins

FDA-Approved PERT Medications:

  • Creon (most commonly prescribed)
  • Pancreaze
  • Zenpep
  • Ultresa
  • Viokace (non-enteric coated)
  • Pertzye

Source: Mission:Cure. “Pancreatic Enzyme Replacement Therapy (PERT).”
https://mission-cure.org/managing-pancreatitis/pancreatic-enzyme-replacement-therapy/

Standard Dosing Guidelines:

The European guidelines for the therapy of chronic CP recommend treating subjects with CP and EPI with enzyme replacement therapy (pancrelipase/pancreatin) of 40,000-80,000 units of lipase during main meals and half dose during snack meals, with starting doses of pancreatic enzyme replacement therapy at least 30-40,000 IU with each meal and 15-20,000 IU with snacks.

For Adults:

  • Main meals: 40,000-80,000 units lipase (typically 2-3 capsules of 25,000-unit strength)
  • Snacks: 20,000-40,000 units lipase (typically 1-2 capsules)
  • Maximum daily dose: Not to exceed 6,000 units lipase per kg body weight per meal

Example for 150 lb (68 kg) person:

  • Maximum per meal: 408,000 units lipase (about 16 capsules of 25,000-unit strength)
  • Typical dose: 2-3 capsules per meal, 1-2 per snack

Sources:

How to Take PERT Correctly:

Timing is EVERYTHING:

✅ DO:

  • Take with the first bite of food
  • Swallow capsules whole with cold or room temperature liquids
  • Split dose throughout meal if eating for >20 minutes
  • Take with ALL meals and snacks (including protein shakes, milk-based drinks)
  • Adjust dose based on fat content of meal

❌ DON’T:

  • Take with hot beverages (deactivates enzymes)
  • Chew or crush capsules (damages enteric coating)
  • Take on empty stomach
  • Skip doses

Exception: You don’t need enzymes for:

  • Plain fruit (fresh or dried)
  • Fruit juice
  • Black coffee or tea
  • Water

Source: OncoLink. “Pancreatic Enzyme Replacement Therapy (PERT).”
https://www.oncolink.org/support/nutrition-and-cancer/during-and-after-treatment/pancreatic-enzyme-replacement-therapy-pert

PERT and Blood Sugar Control:

Studies uniformly showed that PERT resulted in increased postprandial responses in GIP and GLP-1; however, the predicted concomitant increase in insulin response was observed only in chronic pancreatitis.

What this means: PERT helps you:

  • Digest food properly
  • Absorb nutrients
  • Potentially improve insulin response
  • Reduce digestive symptoms

Source: Hart PA, et al. “Type 3c (pancreatogenic) diabetes mellitus secondary to chronic pancreatitis and pancreatic cancer.” Lancet Gastroenterology & Hepatology 2016;1(3):226-237.
https://pmc.ncbi.nlm.nih.gov/articles/PMC5495015/

Cost and Insurance:

  • Typical cost without insurance: $3,000-5,000/month
  • Most insurance plans cover PERT (check with your provider)
  • Patient assistance programs available:
    • AbbVie (Creon): AbbVie.com/PatientAccessSupport
    • Other manufacturers have similar programs

Component 2: Medication Management

In chronic pancreatitis-associated diabetes with mild hyperglycemia (HbA1c <8%), oral hypoglycemic agents may be appropriate, and when concomitant insulin resistance is suspected or evidenced, therapy with the insulin sensitizer metformin should be considered as first-line oral therapy for T2DM.

First-Line: Metformin

Recommended for mild hyperglycemia (HbA1c <8%)

Dosing:

  • Start: 500 mg twice daily with meals
  • Increase gradually to 1,000 mg twice daily
  • Maximum: 2,000 mg daily

Benefits specific to Type 3c:

  • Low hypoglycemia risk
  • Metformin, due to low incidence of hypoglycemia and anti-neoplasm effects, is recommended as the first line therapy for pancreatic diabetes
  • May reduce pancreatic cancer risk

Side Effects:

  • Diarrhea, nausea (common with pancreatitis)
  • May worsen weight loss
  • Lactic acidosis (rare)

Sources:

What to AVOID:

❌ GLP-1 Agonists (Ozempic, Victoza, Mounjaro)

  • Incretin therapies should be avoided because of a putative association with pancreatitis and potential worsening of gastrointestinal symptoms with these therapies
  • May worsen pancreatitis
  • Cause weight loss (undesired in Type 3c)

❌ DPP-4 Inhibitors (Januvia, Onglyza)

  • Same pancreatitis concerns

❌ SGLT2 Inhibitors (with caution)

  • SGLT2 inhibitors might increase the risk of a condition called diabetic ketoacidosis if someone is very insulin deficient
  • May be used if closely monitored

❌ Sulfonylureas (Glipizide, Glyburide)

  • Insulin secretagogues (sulfonylureas and glinides) increase the risk of malignancy and can cause hypoglycemia, and are less effective due to declining beta cell function in type 3c diabetes

Sources:

When Insulin Is Needed:

Most Type 3c patients eventually need insulin (within 5 years of diagnosis).

Insulin Strategy:

  • Start with basal insulin (long-acting): Insulin glargine (Lantus) or insulin detemir (Levemir)
  • Add bolus insulin (mealtime) if needed: Insulin lispro (Humalog), aspart (Novolog), or regular insulin
  • Typical approach: Basal-bolus regimen

CRITICAL HYPOGLYCEMIA WARNING:

People with type 3c diabetes can have low blood sugar levels (hypoglycemia) due to missing a meal, injecting too much insulin, or not taking enough pancreatic enzymes to properly digest food, and injecting too much insulin can result in hypoglycemia, which occurs when the body’s blood sugar levels drop dangerously low.

Why Type 3c hypoglycemia is MORE dangerous:

  • No glucagon to raise blood sugar
  • Episodes last LONGER
  • Lower doses of insulin cause drops

Prevention:

  • Start with LOWER insulin doses than Type 2
  • Monitor blood sugar frequently
  • Never skip meals
  • Always take PERT with food
  • Keep fast-acting glucose available

Sources:

Component 3: Continuous Glucose Monitoring (CGM)

This is ESSENTIAL for Type 3c diabetes.

Studies found that patients with T3cDM have higher estimated HbA1c and blood glucose levels but HbA1c levels may not accurately reflect glycemic fluctuations, and CGM may provide more accurate management and optimize glycemic control in these patients, with glucose monitoring systems proving essential for optimal management.

Why CGM Is Critical:

Traditional fingerstick testing misses the wild swings of Type 3c diabetes.

CGM provides:

  • Real-time glucose readings every 5 minutes
  • Alerts for high and low blood sugar
  • Trend arrows showing direction/speed of changes
  • Data patterns your doctor can analyze

Source: Valente R, et al. “The Challenge of Type 3c Diabetes: From Accurate Diagnosis to Effective Treatment.” JCEM Case Reports 2025;3(7):luaf109.
https://pmc.ncbi.nlm.nih.gov/articles/PMC12093095/

CGM Devices Available (2026):

Prescription CGMs (for insulin users):

  • Dexcom G7 (10-day sensor)
  • FreeStyle Libre 3 (14-day sensor)
  • Eversense E3 (180-day implantable)
  • Eversense 365 (365-day implantable)

Over-the-Counter CGMs:

  • Dexcom Stelo (for non-insulin users)

Target Metrics:

  • Time in Range (TIR): 70-180 mg/dL → Aim for >70%
  • Time Below Range: <70 mg/dL → Aim for <4%
  • Time Above Range: >180 mg/dL → Aim for <25%

Sources:

Insurance Coverage:

  • Medicare covers CGM for insulin users
  • Most private insurance covers CGM
  • Prior authorization usually required

Component 4: Nutritional Management

Patients with chronic pancreatitis are deemed at high risk for malnutrition with typical complications including maldigestion, malabsorption, abdominal pain, vitamin deficiency and poor bone health, and dietary management should prioritize prevention.

Dietary Principles:

  1. Moderate Fat Restriction
  • Limit: 30-50 grams fat per day (U.S. recommendations)
  • Why: Damaged pancreas can’t digest fat well
  • With PERT: Can tolerate higher fat intake
  1. High-Protein Diet
  • Target: 1.0-1.5 g/kg body weight per day
  • Why: Prevents muscle wasting, supports healing
  • Sources: Lean meats, fish, eggs, protein powder but watch for added sugars
  1. Frequent Small Meals
  • Pattern: 4-6 small meals/snacks per day
  • Why: Easier to digest, more stable blood sugar
  • Avoid: Large meals (overwhelm damaged pancreas)
  1. Complex Carbohydrates
  • Choose: Whole grains, vegetables, legumes
  • Limit: Simple sugars, refined carbs
  • Why: Prevents blood sugar spikes

Source: Mission:Cure. “Nutrition for Chronic Pancreatitis.” April 2025.
https://mission-cure.org/managing-pancreatitis/nutrition-for-chronic-pancreatitis/

Sample Daily Meal Plan:

Breakfast (7:00 AM):

  • 2 scrambled eggs (12g protein, 10g fat)
  • 1 slice whole wheat toast with 1 tsp butter (2g fat)
  • 1/2 cup berries
  • PERT: 2 capsules (50,000 units)

Mid-Morning Snack (10:00 AM):

  • Greek yogurt (15g protein, 0-5g fat)
  • Small handful almonds (6g fat)
  • PERT: 1 capsule (25,000 units)

Lunch (12:30 PM):

  • 4 oz grilled chicken breast (28g protein, 3g fat)
  • 1 cup steamed vegetables
  • 1/2 cup brown rice
  • Small salad with 1 Tbsp olive oil dressing (14g fat)
  • PERT: 2-3 capsules (50,000-75,000 units)

Afternoon Snack (3:30 PM):

  • Protein shake (20g protein, 2g fat)
  • 1 medium apple
  • PERT: 1 capsule (25,000 units)

Dinner (6:00 PM):

  • 4 oz baked salmon (23g protein, 11g fat)
  • 1 cup roasted vegetables with 1 tsp olive oil (5g fat)
  • 1 small sweet potato
  • PERT: 2-3 capsules (50,000-75,000 units)

Evening Snack (8:30 PM):

  • Low-fat cottage cheese (14g protein, 2g fat)
  • Sliced cucumber
  • PERT: 1 capsule (25,000 units)

Daily Totals:

  • Protein: ~120g
  • Fat: ~50g
  • PERT: 10-11 capsules

Medium-Chain Triglyceride (MCT) Oil:

Special fat source for Type 3c patients:

MCT (Medium Chain Triglyceride) oil is a type of fat that is absorbed directly into the blood, without being broken down by pancreatic enzymes, and may be a good source of fat for chronic pancreatitis patients and may help alleviate some of the challenges caused by eating a low-fat diet.

Dosing:

  • Start: 1 Tbsp daily
  • Increase to: 2-3 Tbsp daily
  • Mix into foods or smoothies

Sources:

  • Coconut oil
  • Palm kernel oil
  • Pure MCT oil supplements

Source: Mission:Cure. “Nutrition for Chronic Pancreatitis.”
https://mission-cure.org/managing-pancreatitis/nutrition-for-chronic-pancreatitis/

Component 5: Vitamin Supplementation

This is CRITICAL and often overlooked.

Very recent studies show a vitamin D deficiency in >90% of patients with chronic pancreatitis, and measuring serum-25-hydroxyvitamin D levels and supplementing deficient patients might be beneficial.

Fat-Soluble Vitamins (A, D, E, K):

Why you’re deficient:

  • Pancreatic damage prevents fat digestion
  • Can’t absorb fat-soluble vitamins
  • Deficiency develops over years

Prevalence in Type 3c patients:

  • Vitamin A: 1-16% deficient; Vitamin D: 33-87% deficient; Vitamin E: 2-27% deficient; Vitamin K: 13-63% deficient

Recommended Supplements:

Vitamin D:

  • Dose: 1,000-2,000 IU daily (some need higher)
  • Form: Vitamin D3 (cholecalciferol)
  • Why critical: Bone health, immune function, may improve glycemic control

Vitamin A:

  • Dose: 5,000-10,000 IU daily
  • Form: Retinyl palmitate or beta-carotene
  • Why critical: Vision, immune function

Vitamin E:

  • Dose: 400-800 IU daily
  • Form: Mixed tocopherols
  • Why critical: Antioxidant, nerve protection

Vitamin K:

  • Dose: 90-120 mcg daily
  • Form: K1 (phylloquinone) or K2 (menaquinone)
  • Why critical: Blood clotting, bone health

Sources:

Water-Soluble Multivitamins:

Consider:

  • B-complex vitamins (especially B12)
  • Vitamin C
  • Zinc
  • Magnesium

Note: These are better absorbed even with pancreatic insufficiency.

Special Formulations for Fat Malabsorption:

Water-soluble versions of fat-soluble vitamins:

  • ADEK vitamins (combination product)
  • May be better absorbed if severe EPI

Component 6: Lifestyle Modifications

  1. Alcohol Abstinence (CRITICAL)

Non-negotiable if you have chronic pancreatitis.

  • Abstaining from alcohol is highly recommended as it exacerbates progression of underlying pancreatic inflammation and fibrosis and contributes to pain, and alcohol acutely inhibits hepatic glucose production and can cause hypoglycemia, especially in the setting of insulin therapy

Why:

  • Worsens pancreatic damage
  • Causes pain flares
  • Increases hypoglycemia risk with insulin

Source: Gudipaty L, Rickels MR. “Pancreatogenic (Type 3c) Diabetes.” Pancreapedia: The Exocrine Pancreas Knowledge Base 2015.
https://pancreapedia.org/reviews/pancreatogenic-type-3c-diabetes

  1. Smoking Cessation (CRITICAL)

Smoking accelerates pancreatic damage.

All patients should be counseled to stop smoking and drinking alcohol as smoking and alcohol use are both risk factors for pancreatic cancer.

Effects of continued smoking:

  • Faster disease progression
  • More severe pain
  • Higher pancreatic cancer risk

Source: Fieker A, et al. “Pancreatic Enzyme Replacement Therapy: A Concise Review.” Clinical and Translational Gastroenterology 2019;10(11):e00102.
https://pmc.ncbi.nlm.nih.gov/articles/PMC6858980/

  1. Exercise (with precautions)

Recommended:

  • 150 minutes moderate aerobic activity per week
  • Light resistance training
  • Walking, swimming, cycling

Precautions:

  • Monitor blood sugar before/during/after
  • Keep fast-acting glucose available
  • Adjust insulin/food accordingly
  • Avoid exercise if blood sugar <100 mg/dL

Monitoring Requirements

Blood Sugar Testing:

Minimum frequency (if on insulin):

Minimum 6-10 blood glucose testing occasions per day are suggested for Type 3c diabetes:

  • Before each meal (3x)
  • 2 hours after each meal (3x)
  • Bedtime (1x)
  • Middle of night if hypoglycemia history (1x)
  • Before/after exercise
  • When feeling “off”

If using CGM:

  • Check CGM trends 4-6 times daily
  • Confirm with fingerstick if:
    • CGM shows <70 or >250 mg/dL
    • Symptoms don’t match CGM reading
    • Before adjusting insulin

Source: Conlon KC, Duggan SN. “Pancreatogenic type 3c diabetes: Underestimated, underappreciated and poorly managed.” Practical Gastroenterology 2017;15(5):14-23.
https://med.virginia.edu/ginutrition/wp-content/uploads/sites/199/2014/06/Parrish-May-17.pdf

Lab Work Schedule:

Every 3 months:

  • HbA1c
  • Fasting glucose

Every 6 months:

  • Complete metabolic panel
  • Lipid panel
  • Liver enzymes
  • Kidney function (eGFR, creatinine)

Annually:

  • Vitamin D (25-hydroxyvitamin D)
  • Vitamins A, E, K
  • Magnesium, zinc
  • Bone density scan (DEXA)
  • Comprehensive eye exam
  • Foot exam

As needed:

  • Fecal elastase-1 (if PERT dosing questions)
  • Pancreatic imaging (if symptoms worsen)

Complications to Watch For

Short-Term Risks:

  1. Severe Hypoglycemia
  • People living with type 3c diabetes are nearly twice as likely to have suboptimal glycemic management and are at an increased risk of hypoglycemia, which unfortunately can be quite protracted if it does occur due to loss of glucagon production from the alpha cells in the pancreas

Warning signs:

  • Shaking, sweating
  • Confusion, dizziness
  • Rapid heartbeat
  • Severe hunger
  • Loss of consciousness

Action:

  • 15g fast-acting carbs immediately (sugary snacks, fruit juices, soda, honey, syrups)
  • Recheck in 15 minutes
  • Repeat if needed
  • Call 911 if unconscious
  1. Diabetic Ketoacidosis (DKA)
  • Diabetic ketoacidosis (DKA) is a rare occurrence in type 3c DM due to impaired glucagon secretion but can occur in severe insulin deficiency triggered by stress, infection, or poor glycemic control

Warning signs:

  • Blood sugar >250 mg/dL
  • Ketones in urine
  • Nausea, vomiting
  • Abdominal pain
  • Fruity breath odor
  • Rapid breathing

Action:

  • Check ketones
  • Call doctor immediately
  • Go to ER if moderate/large ketones

Sources:

Long-Term Complications:

Same risks as Type 1 and Type 2 diabetes:

Despite the limited data, T3cDM patients appear to share a similar risk for the micro- and macro-vascular complications of diabetes as in T1DM and T2DM:

  • Retinopathy (eye damage)
  • Nephropathy (kidney damage)
  • Neuropathy (nerve damage)
  • Cardiovascular disease
  • Poor wound healing

Additional risks specific to Type 3c:

Malnutrition and Weight Loss

  • Muscle wasting despite normal/high BMI
  • Protein-calorie malnutrition
  • Sarcopenia (muscle loss)

Bone Disease

  • Osteopenia/osteoporosis (affects 2/3 of patients)
  • Increased fracture risk
  • Due to: Vitamin D deficiency, poor calcium absorption, inflammation

Pancreatic Cancer

  • Chronic pancreatitis and diabetes are regarded as the risk factors of pancreatic malignancy
  • Lifetime risk: Higher than general population
  • Requires surveillance

Source: Makuc J. “Management of pancreatogenic diabetes: challenges and solutions.” Diabetes, Metabolic Syndrome and Obesity 2016;9:311-315.
https://pmc.ncbi.nlm.nih.gov/articles/PMC5003514/

When to See Specialists

Essential Specialist Team:

  1. Endocrinologist
  • Diabetes management
  • Insulin dosing
  • Hormone optimization
  1. Gastroenterologist
  • Pancreatic disease management
  • PERT dosing
  • Monitoring for complications
  1. Registered Dietitian (RD)
  • Meal planning
  • PERT coordination with meals
  • Weight management
  • Vitamin optimization
  1. Diabetes Educator (CDE)
  • CGM training
  • Insulin technique
  • Hypoglycemia prevention

Red Flags—Seek Immediate Care:

Call 911:

  • Blood sugar <50 mg/dL and not responding to treatment
  • Loss of consciousness
  • Severe abdominal pain
  • Signs of DKA (listed above)

Call Doctor Same Day:

  • Blood sugar >300 mg/dL repeatedly
  • Moderate ketones in urine
  • Persistent vomiting/diarrhea
  • Fever >101°F
  • Severe pain not controlled with medication

Living Well with Type 3c Diabetes: A Biblical Perspective

You Are Fearfully and Wonderfully Made

“I praise you because I am fearfully and wonderfully made; your works are wonderful, I know that full well.” — Psalm 139:14

Even with pancreatic damage, your body is still a miracle. God designed incredible backup systems and healing mechanisms.

This Is Not a Punishment

Paul, who wrote much of the biblical New Testament, in 2 Corinthians 12:7-10 he was given a “thorn in his flesh”.  It was not removed, even through prayer.  It was there to reveal his purpose in life.  Not to bemoan an affliction but to show the glory of Christ in a life worth living. 

I just want to say that I cannot imagine being burdened with something such as type 3 diabetes.  My heart truly bends for those that have this.  I hope to add some encouragement that you are a child of a great creator and he makes no mistakes.  We also live in a fallen world and are under constant physical, mental and emotional attack.  I contend these attacks result from the spiritual demonic and they fight in the supernatural existence.  The only way we can reciprocate is fight in the supernatural as well.  This comes from prayer and seeking Gods will through Christ.  There is so much more to the battle but in the simplest terms stay hopeful in prayer, too much good comes from it.  And, if you need prayer, I’m glad to lift you up, just send a note through the connection at this end of this discussion.  I will respond. 

Type 3c diabetes often comes from:

  • Genetic predisposition (hereditary pancreatitis)
  • Alcohol use (now forgiven if repented)
  • Unknown causes (idiopathic)
  • Medical necessity (surgery)

Regardless of cause, you are loved and not condemned.

“Therefore, there is now no condemnation for those who are in Christ Jesus.” — Romans 8:1

Your Body Is a Temple—Care for It

“Do you not know that your bodies are temples of the Holy Spirit, who is in you, whom you have received from God? You are not your own; you were bought at a price. Therefore honor God with your bodies.” — 1 Corinthians 6:19-20

Honoring God means:

  • Taking your medications faithfully
  • Using your PERT as prescribed
  • Monitoring your blood sugar
  • Eating nourishing foods
  • Resting when needed
  • Seeking medical care

This is spiritual obedience, not vanity.

Cast Your Anxiety on Him

“Cast all your anxiety on him because he cares for you.” — 1 Peter 5:7

Type 3c diabetes brings unique anxieties:

  • Fear of hypoglycemia
  • Unpredictable blood sugars
  • Constant vigilance
  • Medical complexity

Give these to God daily. He shoulders what you cannot carry.  Ask Him to provide you peace and clarity.  Don’t give up, stay the course in prayer. 

Practical Faith Application:

Morning Prayer: “Lord, this pancreas You gave me is damaged, but You are not surprised. Guide my hands as I test my blood sugar, take my medications, and make food choices today. Give me wisdom and peace. Amen.”

Before Meals: “Father, thank You for this food. Help these enzymes I’m about to take do their work. Let my body absorb what it needs. May this meal sustain the temple You’ve entrusted to me. Amen.”

At Bedtime: “God, I’ve done what I can today. You watch over me through the night. If my blood sugar drops, wake me or send help. I trust You with my life. Amen.”

Key Takeaways

✅ DO:

  1. Get properly diagnosed using Ewald-Bretzel criteria
  2. Take PERT with EVERY meal and snack (not optional)
  3. Use a CGM if possible (essential for Type 3c)
  4. See an endocrinologist AND gastroenterologist
  5. Take fat-soluble vitamin supplements daily
  6. Monitor blood sugar 6-10 times daily if on insulin
  7. Eat 4-6 small meals instead of 3 large ones
  8. Stay hydrated (8+ glasses water daily)
  9. Quit alcohol completely if you have pancreatitis
  • Stop smoking immediately

❌ DON’T:

  1. Don’t assume you have Type 2 diabetes without ruling out Type 3c
  2. Don’t skip PERT doses (leads to malnutrition)
  3. Don’t use GLP-1 agonists (Ozempic, Mounjaro, etc.)
  4. Don’t eat high-fat meals without adequate PERT
  5. Don’t ignore digestive symptoms (sign of inadequate PERT)
  6. Don’t rely on HbA1c alone (doesn’t show full picture in Type 3c)
  7. Don’t use same insulin doses as Type 2 (Type 3c needs less)
  8. Don’t skip vitamin supplementation
  9. Don’t exercise with blood sugar <100 mg/dL
  • Don’t try to reverse Type 3c with weight loss (it won’t work)

Summary: Type 2 vs Type 3c at a Glance

 

Type 2 Diabetes

Type 3c Diabetes

Cause

Insulin resistance + beta cell dysfunction

Physical pancreatic damage

Reversible?

✅ YES (with weight loss)

❌ NO (permanent damage)

Main treatment

Lifestyle changes, metformin, possibly insulin

PERT + insulin + metformin

Digestive issues

Rare

Common (steatorrhea, bloating)

Hypoglycemia risk

Low (unless on certain meds)

⚠️ HIGH (no glucagon response)

Weight pattern

Usually overweight/obese

Often normal or underweight

Vitamin deficiencies

Uncommon

Very common (especially ADEK)

CGM necessity

Helpful

⚠️ ESSENTIAL

PERT needed?

No

✅ YES (non-negotiable)

Natural supplements

May help

⚠️ Less effective; focus on PERT

Final Thought: Hope in the Midst of Complexity

Type 3c diabetes is more complex than Type 2.

But complexity doesn’t mean hopelessness.

With:

  • Proper diagnosis
  • PERT therapy
  • Appropriate medications
  • CGM monitoring
  • Vitamin supplementation
  • Specialist care
  • Faith in God’s sustaining power and continuous prayer.  You have a purpose

You can live a full, vibrant life.

Your pancreas may be damaged, but you are not broken.

“But he said to me, ‘My grace is sufficient for you, for my power is made perfect in weakness.’ Therefore I will boast all the more gladly about my weaknesses, so that Christ’s power may rest on me.” — 2 Corinthians 12:9

Stay well, stay healthy in mind, body and spirit.  God bless you in all ways. 

Complete Reference List

  1. Hart PA, Bellin MD, Andersen DK, et al. “Type 3c (pancreatogenic) diabetes mellitus secondary to chronic pancreatitis and pancreatic cancer.” Lancet Gastroenterology & Hepatology 2016;1(3):226-237. https://pmc.ncbi.nlm.nih.gov/articles/PMC5495015/
  2. American Diabetes Association Professional Practice Committee. “2. Diagnosis and Classification of Diabetes: Standards of Care in Diabetes—2025.” Diabetes Care 2025;49(Supplement_1):S27. https://diabetesjournals.org/care/article/49/Supplement_1/S27/163926
  3. Cleveland Clinic. “Type 3c Diabetes: What It Is, Symptoms & Treatment.” September 2023. https://my.clevelandclinic.org/health/diseases/24953-type-3c-diabetes
  4. Ewald N, Kaufmann C, Raspe A, et al. “Prevalence of diabetes mellitus secondary to pancreatic diseases (type 3c).” Diabetes & Metabolism Research and Reviews 2012;28(4):338-342. https://pubmed.ncbi.nlm.nih.gov/22121010/
  5. Ewald N, Bretzel RG. “Diabetes mellitus secondary to pancreatic diseases (Type 3c)—are we neglecting an important disease?” European Journal of Internal Medicine 2013;24(3):203-206. https://www.ejinme.com/article/S0953-6205(13)00004-6/fulltext
  6. Valente R, Waldthaler A, Scandavini CM, et al. “The Challenge of Type 3c Diabetes: From Accurate Diagnosis to Effective Treatment.” JCEM Case Reports 2025;3(7):luaf109. https://academic.oup.com/jcemcr/article/3/7/luaf109/8139714 (Also at: https://pmc.ncbi.nlm.nih.gov/articles/PMC12093095/)
  7. Sivasubramanian D, Prasaanth S, Abirami P, et al. “Pancreatogenic (Type 3c) Diabetes Revealed by Diabetic Ketoacidosis.” Cureus 2024;16(12):e75804. https://pmc.ncbi.nlm.nih.gov/articles/PMC11688928/
  8. Makuc J. “Management of pancreatogenic diabetes: challenges and solutions.” Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy 2016;9:311-315. https://pmc.ncbi.nlm.nih.gov/articles/PMC5003514/
  9. Gudipaty L, Rickels MR. “Pancreatogenic (Type 3c) Diabetes.” Pancreapedia: The Exocrine Pancreas Knowledge Base https://pancreapedia.org/reviews/pancreatogenic-type-3c-diabetes

Disclaimer: This article is for educational purposes only and does not constitute medical advice. Always consult with qualified healthcare professionals before making any changes to your diabetes management, medications, or diet. Type 3c diabetes is a serious medical condition requiring specialized care from endocrinologists and gastroenterologists.

About the Author: Dan Geminick operates MBS Synergy, a Christian wellness platform focused on evidence-based health information integrated with biblical wisdom. All medical claims in this article are supported by peer-reviewed research and clinical guidelines.

Last Updated: February 2026 For updates and additional resources, visit: mbssynergy.com

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