what is vitamin k for? how is it good for your body? and how does it help it?

Question

does it have anything to do with skin lightening? for dark circles or anything?

Answer 1

Vitamin K

Vitamin K is a fat-soluble vitamin. The "K" is derived from the German word "koagulation". Coagulation refers to blood clotting, because vitamin K is essential for the functioning of several proteins involved in blood clotting (1). There are two naturally occurring forms of vitamin K. Plants synthesize phylloquinone, also known as vitamin K1. Bacteria synthesize a range of vitamin K forms, using repeating 5-carbon units in the side chain of the molecule. These forms of vitamin K are designated menaquinone-n (MK-n), where n stands for the number of 5-carbon units. MK-n are collectively referred to as vitamin K2 (2). MK-4 is not produced in significant amounts by bacteria, but appears to be synthesized by animals (including humans) from phylloquinone. MK-4 is found in a number of organs other than the liver at higher concentrations than phylloquinone. This fact, along with the existence of a unique pathway for its synthesis, suggests there is some unique function of MK-4 that is yet to be discovered (3).

Function

The only known biological role of vitamin K is that of the required coenzyme for a vitamin K-dependent carboxylase that catalyzes the carboxylation of the amino acid, glutamic acid, resulting in its conversion to gamma-carboxyglutamic acid (Gla) (4). Although vitamin K-dependent gamma-carboxylation occurs only on specific glutamic acid residues in a small number of proteins, it is critical to the calcium-binding function of those proteins (5, 6).

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Answer 2

There are many causes of dark circles, from age, heredity, allergies, cold or sinus infection, bone structure and glasses which are not so commonly known.
http://www.mydarkcirclesblog.com/2006/11/27/causes-of-dark-circles/

If you would like to apply home remedies to reduce dark circles, here are some of my suggestions:
Buy a box of regular, old fashioned unflavored gelatin (e.g. Knox) from grocery store. Take a small cup or bowl and put in 1 teaspoon of the gelatin mix. Add one tablespoon of boiling water & stir for a minute. Test it on your wrist to make sure it is not too hot. Then, using a cotton ball, pat it under your eyes as you would an eye cream or gel. Go lie down and listen to some music, or take a bath & let it stay on for at least 30 minutes. Then just rinse it off.Gelatin is very high in Vitamin K & Biotin. It will not remove your dark circles on the first application (but you will notice a difference), but if you do it daily for a week, and then 2-3 times a week for maintenance, you should notice a drastic reduction in dark circles.
http://www.mydarkcirclesblog.com/2007/01/01/special-spa-home-remedy-to-reduce-dark-circles/

Answer 3

Vitamin K makes the blood clot up, If someone is bleeding bad, it will help stop the bleedin.

Answer 4

read this:

http://en.wikipedia.org/wiki/Vitamin_K