Vitamin K
First IMPORTANT. The body only soaks up five pc of vitamins from pills or tablets the rest is washed down the toilet. Discover how you can absorb 98%. Glance at the bottom of this page.
Introduction Vitamin K is an essential fat-soluble micronutrient, which is necessary for a unique post-translational chemical modification in a miniscule group of proteins with calcium-binding properties, known generally as vitamin K-dependent proteins or Gla proteins. This far, the sole undoubted role of vitamin K in health is in the upkeep of ordinary coagulation. The vitamin K dependent coagulation proteins are synthesized in the liver and comprise factors II, VII, IX, and X, which have a haemostatic role ( i.e. They’re procoagulants that arrest and forestall bleeding ), and proteins C and S, which have an anticoagulant role ( i.e. They hold back the clotting process ). In spite of this duality of function, the overriding effect of nutritive vitamin K deficiency is a bleeding disposition thanks to the relative immobility of the procoagulant proteins.
Vitamin K-dependent proteins synthesized by other tissues include the bone protein osteocalcin and matrix Gla protein, though their functions wait to be explained. Biological role of vitamin K is the family name for a sequence of fat-soluble compounds which have the standard 2-methyl-1,4-naphthoquinone nucleus but differ in the structures of a side chain at the 3-position.
Vitamin K are synthesized by plants and bacteria. In plants the sole significant molecular form is phylloquinone ( vitamin K1 ) that has a phytyl side chain.
Bacteria synthesize a family of compounds called menaquinones ( vitamin K2 ), which have side chains based fully on repeating unsaturated 5-carbon ( prenyl ) units. These are delegated menaquinone-n ( MK-n ) according to the number ( n ) of prenyl units. Some bacteria also synthesize menaquinones in which a few of the double bonds is saturated. The compound 2-methyl-1,4-naphthoquinone ( common name menadione ) may be accepted as a provitamin because vertebrates can change it to MK-4 by adding a 4-prenyl side chain at the 3-position.
The biological role of vitamin K is to act as a cofactor for a specific carboxylation reaction that transforms selective glutamate. .
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Beauty Advantages Of Antioxidants for Healthy Skin
Although there isn’t conclusive proof that antioxidants keep skin from aging, experts do agree they have the ability to ‘capture’ free radicals and may protect us from certain ailments. Antioxidant-rich foods can also give us a healthier, glowing complexion.
As outlined by Susan M. Kleiner, R.D., Ph.D, a Seattle-based nutritionist, eating foods rich in antioxidants is best. “There’s no replacement for getting nutrients through food. Your body absorbs and assimilates them much better than in supplement form.”
Kleiner suggests following the U.S. Department of Agriculture’s Food Guide Pyramid, and eating three to five servings of vegetables and two to four servings of fruit each day. Choose at least one citrus fruit, such as an orange, a tangerine, or a grapefruit, for vitamin C. To increase beta-carotene intake, eat at least two orange-yellow or leafy green vegetables each day.
Eat Right for Younger Looking Skin
Maintaining a healthy diet equals younger looking skin. Drinking a cup of orange juice and eating one raw carrot provides twice the Recommended Dietary Allowance (RDA) of vitamin C and beta-carotene. The RDA for vitamin E is harder to meet, especially for those on a low-fat diet.
“Don’t be afraid to add a couple of tablespoons of olive oil to your diet, or to eat some nuts or seeds,” advises Dr. Kleiner.
The following guideline can be used for RDAs for three of the most common antioxidant nutrients, vitamin C, vitamin E, and beta-carotene; good sources and how best to maximize benefits of each are included.
Vitamin C: RDA at least 60 mg. (1/2 cup orange juice = 70 mg.) Citrus fruits and juices and tomatoes are good sources of vitamin C. Eat whole fruit for extra fiber. Avoid juice in glass containers, and heat-pasteurized juice. Light and heat destroy some of the vitamin C.
Vitamin E: RDA 8 mg for women / 10 mg. for men (1 tablespoon of canola oil = 9 mg.) Good sources include nuts, seeds and their oils, fatty fish such as salmon, mackerel, halibut, and trout, and wheat germ. Use canola, olive, or another vegetable oil in place of butter or margarine when cooking.
Beta-carotene: no established RDA. Expert Dr. Kleiner, however, recommends 5-6 mg. ( One carrot = 12 mg.) Orange and yellow vegetables, and leafy green vegetables, including broccoli, are all good sources. Instead of potato chips or popcorn for an evening snack while watching tv, opt for prepackaged, washed and peeled baby carrots.
If you feel you are unable to meet the RDAs through diet alone, by all means take an all-in-one antioxidant vitamin supplement a day, but continue to focus on rich food sources.
Summary
Because many over-the-counter cosmetics containing antioxidants don’t have enough to be totally affective by themselves, it is best to ‘feed’ them to your skin in combination with a healthy, antioxidant rich diet for younger looking skin.
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