Vitamin K Supplementation to Reduce Deficiencies in Adults With Cystic Fibrosis (VITK-FK)
Group A: 2mg, every day for 6 months
Group B: 7mg, twice a week for 6 months
Apparently using phylloquinone = K1
Wonder about K2 and D3
Respir Med. 2019 Jul 6;155:36-42. doi: 10.1016/j.rmed.2019.07.005
Hatziparasides G1, Loukou I2, Moustaki M2, Douros K3.
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Cystic fibrosis (CF) is an inherited genetic disorder with multiorgan involvement. Gastrointestinal tract dysfunction leads to fat and fat-soluble vitamins (A,D,E,K) malabsorption and deficiency of these vitamins. Subclinical vitamin K (VK) deficiency seems to be a common problem in CF patients. However, despite the rest of fat-soluble vitamins being routinely supplemented, this is not a universal clinical practice for VK. Inefficient levels of VK may have significant effects on blood coagulation and bone formation. There are also some data indicating that VK may play a key role on regulation of inflammation. Supplementing CF patients with VK seems rational, but the appropriate dosing regimens are still a matter of debate. This review will try to delineate the problem and communicate the latest opinions on this controversial issue.