Abstract
Vitamin K deficiency is very rare except in neonatal populations. This is due to dietary sources, particularly plant-derived phylloquinones (vitamin K1) being abundantly distributed in nature and ubiquitously available in common foods. However, there is very little information on the bioavailability of vitamin K from foods. Furthermore, despite the increased understanding of vitamin K's biological roles, there are difficulties in establishing a causal link between plausible biomarkers of vitamin K deficiency and reproducible health outcome measures. Additionally, with vitamin K there is the added complication that this vitamin is also synthesized in the gastrointestinal tract by gut microflora. As a result, the exact dietary requirements for vitamin K in numerical terms have not been fully established. Clinically significant vitamin K deficiency is almost nonexistence in healthy populations. However, there are states in which it is compromised in some population cohorts other than neonatal populations. This review illustrates some examples of vitamin K insufficiency states, which include eating disorders, undernourished children, inflammatory bowel disease, and chronic kidney disease. It also describes some biomarkers of vitamin K status used in recent studies.
Original language | English |
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Title of host publication | Handbook of Famine, Starvation, and Nutrient Deprivation |
Subtitle of host publication | From Biology to Policy |
Publisher | Springer International Publishing Switzerland |
Pages | 1753-1768 |
Number of pages | 16 |
ISBN (Electronic) | 9783319553870 |
ISBN (Print) | 9783319553863 |
Publication status | Published - 6 Mar 2019 |
Keywords
- Carboxylation
- Glutamate residues
- Menaquinones
- Natto
- Phylloquinones
- Uncarboxylated
- Vitamin k