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( Vitamin K) Vitamin K (K from "Koagulations-Vitamin" in German, Danish, Swedish and Norwegian^[1]) denotes a group of lipophilic, hydrophobic vitamins that are needed for the posttranslational modification of certain proteins, mostly required for blood coagulation. Chemically they are 2-methyl-1,4-naphthoquinone derivatives.

Vitamin K₂ (menaquinone, menatetrenone) is normally produced by bacteria in the intestines, and dietary deficiency is extremely rare unless the intestines are heavily damaged or are unable to absorb the molecule^{[citation needed]}.

All members of the vitamin K group of vitamins share a methylated naphthoquinone ring structure, and vary in the aliphatic side chain attached at the 3-position (see figure 1). Phylloquinone (also known as vitamin K₁) invariably contains in its side chain four isoprenoid residues, one of which is unsaturated.

Menaquinones have side chains composed of a variable number of unsaturated isoprenoid residues; generally they are designated as MK-n, where n specifies the number of isoprenoids.

Vitamin K Subcategories Thinking and Attitude > Hypnosis for Change > Thinking and Attitude > Neuro Linguistic Programming > Thinking and Attitude > Emotional Freedom Techniques (EFT) > Fitness Courses > Will Brink > Frank's Column > > Fitness Links > > Skin Health and Care > > The 6 Critical Keys to Dynamic Senior Living > > Making it Happen - Taking Action to Change Your Life > > Will Brink > > Vitamin K Articles Is restorAGE right for you? by Jennifer Baxt restorAGE was developed by Stuart Consumer Product Labs in conjunction with Joseph G. Olivieri M.D., an antiaging and growth hormone specialist. restorAGE is a powdered formula that contains 100% vegetarian, all natural ingredients. It was designed a... What You Need to Know About Natural Healthy Skin Care by Laurel Levine Don't you just hate it when products on the market promise natural healthy skin care, only to learn that what you bought wasn't natural at all or giving you the results you expected? If you're searching for a quality skin care product, you wa... 5 Reasons For Working With A Personal Trainer by Bryon Zirker By Bryon Zirker A lot of people think of personal trainers as people who show you how to go about lifting weights. This is actually a small part of what a personal trainer does. When certified a personal trainer provides his/her clients with... Necessary Vitamins in Skin Care Products by Carol Belanger Reading the ingredients on skin care products can be quite confusing. The labels use terms such as pentapeptides 3, Rentinyl, Palmitate and Ascorbyl Pamitate and to the average person these terms are bewildering. However, terms such as the ones li... How Important is Packaging Design to Your Product's Success? by Kevin A Packaging is the third largest industry in America valued at $110 billion per annum. It is estimated that there are 350 billion packages which comprise of the tiniest item in pharmaceuticals to supersacks used that are used to carry thousands of poun... Beauty & Healthy Body From Within by Jerzy George With over ten thousand different dietary supplements on the market, how do you know which one to choose? All of these products promise a slim, trim, body that is free of fat, but not all of them actually fulfill that promise. Instead, most of them fa... Increased Interest in Natural Products by Terry Christensen In the past several years there has been an increased interest in natural products, and natural skin care products are no exception. It's the simplest, most basic ingredients that have been the most effective in healing and maintaining healthy skin t... Cut through All the Hype When Looking for Quality Nutrition: Here's a Simple Solution by Mark Petticord Convenience technologies and automation - we all depend on it. We want it and we want it now! There is a drive-through for every product and service imaginable. Consumers thrive on getting FAST access to their products and services. Convenien... Anti-Aging Vitamins by Judith Emardel For decades now scientists and medical researchers have been laboring relentlessly in an effort to unlock the mysteries of the aging process. One area of some of the most intense study has been the relationship between nutrition and the effects of ag... Vitamins and Polyphenols in Skincare by Francis Adam The whole cosmetic market is trying to turn back the clock on maturing skin. There is the growth in products designed to prevent the skin from aging, and also to force the skin to act "Younger"., reprogramm it to be healthy and younger. Among...