Should you take vitamin K with food?

Yes, a meal with some fat helps. Vitamin K1 is absorbed together with fat from food.^[1] In the gut, bile and enzymes from the pancreas mix vitamin K with fat before the small intestine absorbs it.^[2]

The body absorbs about 80% of vitamin K1 in its free form, but much less from food. From spinach it absorbs only 4% to 17% as much as from a tablet. Eating vegetables with some fat raises this amount.^[2]