Your body gets vitamin A from food sources such as liver, carrots, butter, egg, milk, and many more. In these foods there are the many forms of vitamin A. Some forms include Retinol, alpha-carotene, beta-carotene, as well as 2 or 3 more carotenes. Your body does not make vitamin A; it absorbs it.
Your body converts Beta Carotene, which serves as an antioxidant, to Vitamin A as needed
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Beta-carotene
Beta-carotene
Vitamin c
There are many foods that can be converted into vitamin A. These include carrots, leafy greens, as well as some vegetable oils.
precursors
Betacarotene
No actually, Vitamin C is one of the "Water-Soluble" vitamins, this means that it does not get deposited as fat in the body rather it remains soluble and is passed out of the human body in the form of faeces.
Nutrients help your body produce things that are necessary for life. Like when you drink milk, you are receiving pro- vitamin D and calcium, which once it enters your body it is converted to Vitamin D and calcium. Your body uses these things to protect and strengthen your bones.
Vitamin K is converted to active vitamin K in the body which helps to activate clotting factors in the liver. Coumadin (warfarin) prevents the body from activating vitamin K, therefore the clotting factors are never activated and your blood becomes thinner or more difficult to clot. When you eat vitamin K rich foods (green leafy vegitables, etc), the vitamin K competes with the Coumadin and can neutralize its effect.
vitamin D
"Sin oil" is not a recognized term or product in the culinary or beauty industry. It may be a typo or a misunderstanding. If you provide more context or clarify the term, I can try to assist you better.
retina