Protocol · Respiratory Health
Cystic Fibrosis Nutritional Support Protocol
Pancreatic Enzymes (PERT) and Vitamin D are the core of this stack, with 8 supporting supplements. Each row gives the amount the protocol lists and the grade our evidence database holds for that supplement in Cystic Fibrosis Nutritional Support.
We are re-verifying the studies cited on protocol pages; only confirmed citations are shown.
The stack
10 supplements · 2 graded
| Grade | Supplement | Amount listed | Why it’s in the stack | Evidence on file |
|---|---|---|---|---|
| Primary stackThe core of this protocol | ||||
| Pancreatic Enzymes (PERT) | Amount listed: 500–2,500 lipase units/kg/meal (max 10,000 units/kg/day) - per CF team guidance | Essential replacement therapy for pancreatic insufficiency to enable fat and nutrient absorption | Not graded yet | |
| Vitamin D | Amount listed: 2,000–5,000 IU daily or higher based on levels (target 30–50 ng/mL) | Deficiency very common due to fat malabsorption; essential for bone health and immune function
| Not graded yet | |
| Supporting stackListed as additions to the core | ||||
| Vitamin E | Amount listed: 100–400 IU daily (water-miscible form preferred) | Fat-soluble vitamin commonly deficient in CF; important for antioxidant protection
| Grade C for Plasma Vitamin E1 study · 141 people | |
| Vitamin A | Amount listed: 5,000–10,000 IU daily (water-miscible form; monitor levels) | Deficiency common; important for immune function, epithelial health, and lung repair | Not graded yet | |
| Vitamin K | Amount listed: 0.3–10 mg daily depending on age and liver function | Deficiency common; important for clotting and bone health | Not graded yet | |
| Probiotics | Amount listed: 10–20 billion CFU daily | May reduce gut inflammation and pulmonary exacerbations in CF patients
| Grade D for Cystic Fibrosis Symptoms258 people | |
| Omega-3 Fatty Acids | Amount listed: 1–3 g EPA+DHA daily | May reduce inflammation and improve lung function in CF patients
| Not graded yet | |
| Sodium Chloride | Amount listed: Salt tablets or dietary salt as recommended by CF team | Replaces salt lost in sweat; essential especially in hot weather or with exercise | Not graded yet | |
| Zinc | Amount listed: 15–25 mg daily | Deficiency common; supports immune function and wound healing | Not graded yet | |
| Calcium | Amount listed: 1,000–1,300 mg daily from diet and supplements combined | Supports bone health, especially important with vitamin D supplementation | Not graded yet | |
How this protocol works
In plain language
Cystic fibrosis (CF) is a genetic disorder affecting the lungs and digestive system, causing thick, sticky mucus that clogs the airways and blocks digestive enzymes from reaching the intestines. This leads to both respiratory problems and malnutrition. About 85-90% of CF patients have pancreatic insufficiency, meaning they cannot properly digest and absorb fats and fat-soluble vitamins without enzyme replacement. Nutritional support is a cornerstone of CF care alongside airway clearance and infection management.
CRITICAL: CF requires specialized multidisciplinary care at accredited CF centers. These supplements are part of standard CF nutrition management and should be guided by your CF care team. Doses need to be individualized based on lab monitoring. Never adjust enzyme doses without guidance.
Pancreatic Enzyme Replacement Therapy (PERT)* is essential for CF patients with pancreatic insufficiency. Without enzymes, fat and nutrients cannot be properly absorbed, leading to malnutrition, poor growth, and vitamin deficiencies. Enzymes must be taken with every meal and snack containing fat or protein.
Vitamin D* deficiency is nearly universal in CF due to fat malabsorption. Adequate vitamin D is crucial for bone health (CF patients are at high risk for osteoporosis), immune function, and potentially lung health. Higher doses than the general population are typically needed.
Vitamin E* is a powerful antioxidant that is poorly absorbed in CF. Deficiency can cause neurological problems. Water-miscible forms are better absorbed.
Vitamin A* is important for immune function, epithelial cell health (including the airways), and vision. Deficiency is common in CF.
Vitamin K* is needed for blood clotting and bone health. CF patients often have low vitamin K, which can contribute to bleeding problems and osteoporosis.
Probiotics* may help with the gut dysbiosis common in CF and might reduce pulmonary exacerbations by improving gut-lung axis health.
Omega-3 Fatty Acids* may help reduce the chronic inflammation that characterizes CF and potentially improve lung function.
Salt (Sodium Chloride)* supplementation is necessary because CF patients lose excessive salt in their sweat. This is especially important during hot weather, exercise, or illness.
Zinc* deficiency is common in CF and can impair immune function and wound healing.
Calcium* is important for bone health, especially alongside vitamin D supplementation.
Expected timeline: Enzyme therapy: immediate improvement in digestion and stool quality. Fat-soluble vitamins: check levels in 2-3 months. These supplements are a lifelong part of CF management with regular monitoring.