Dietary Vitamin K Absorption

Finally vitamin k is a fat soluble vitamin and dietary fat can significantly increase its absorption from food.
Dietary vitamin k absorption. This is a fact sheet intended for health professionals. These new insights may lead to a revision of the recommended daily intake for vitamin k. For a reader friendly overview of vitamin k see our consumer fact sheet on vitamin k.
Vitamin k plays an essential role in blood clotting heart health and bone health. The bioavailability of dietary vitamin k phylloquinone menaquinones is lower than generally assumed and depends on the form in which the vitamin is ingested. Intestinal absorption of dietary phylloquinone k 1 and mk 7 in the intestinal lumen k 1 and mk 7 are incorporated into mixed micelles comprising bile salts the products of pancreatic lipolysis and other dietary lipids.
Introduction vitamin k the generic name for a family of compounds with a common chemical structure of 2 methyl 1 4 naphthoquinone is a fat soluble vitamin that is naturally present in some foods and is available as a dietary supplement. Great foods for getting vitamins a to k in your diet medically reviewed by natalie butler r d l d. For example the absorption of vitamin k from kale and spinach foods identified as having a high vitamin k content are on the order of 4 to 17 regardless of whether raw or cooked.
Mixed micelles are taken up by intestinal enterocytes of the small intestine and are incorporated into nascent cm which have apoa and apob 48 on their surface. May help prevent heart disease calcium build up in the arteries around your heart is a huge risk factor for heart. There is a need for stable isotope studies with enhanced sensitivity to expand knowledge of the bioavailability absorption disposition and metabolism of different molecular forms of vitamin k.
The bioavailability of vitamin k 1 in spinach differs from that in supplements. Estimates for absorption are on the order of 80 for vitamin k 1 in its free form as a dietary supplement but much lower when present in foods. Written by the healthline editorial team updated on december 21 2017 vitamin a.
The diet contained 15 of energy from protein 32 from fat and the remainder from carbohydrate. From seeds or nuts to meals containing vitamin k rich foods can help increase absorption. Most sources of vitamin k contain little or no fat and therefore adding some fat e g.