The majority of people suffering from cystic fibrosis have an increased need for certain vitamins and sodium because this genetic disease is characterised by a lack of pancreatic enzymes, which in turn will result in poor absorption of most nutrients.
People with cystic fibrosis may thus primarily suffer from a lack of vitamins A, D and E. Vitamin K deficiency may also occur as a result of long-term use of antibiotics, concomitant liver involvement and general nutrient malabsorption.
Vitamin A: 3500 and 7000 International Units (IU) for women and 4500 to 9000 IU for men
Vitamin E: up to 30mg a day for both men and women
Vitamin D: 5-10mcg per day for adults
Vitamin K: up to 5mg twice a week for adults on long-term antibiotic therapy