Vitamin A is an essential vitamin required for vision, gene transcription, boosting immune function, and great skin health. A deficiency in vitamin A can lead to blindness and increased viral infection, however deficiency is only considered a problem in developing countries where it is a leading cause of blindness in children. Over consumption of vitamin A can lead to jaundice, nausea, loss of appetite, irritability, vomiting, and even hair loss. Vitamin A if a fat soluble vitamin, and therefore, needs to be consumed with fat in order to have optimal absorption
Vitamin D is an essential vitamin required by the body for the proper absorption of calcium, bone development, control of cell growth, neuromuscular functioning, proper immune functioning, and alleviation of inflammation. A deficiency in vitamin D can lead to rickets, a disease in which bones fail to properly develop. Further, inadequate levels of vitamin D can lead to a weakened immune system, increased cancer risk, poor hair growth, and osteomalacia, a condition of weakened muscles and bones. Conversely, excess vitamin D can cause the body to absorb too much calcium, leading to increased risk of heart attack and kidney stones. Vitamin D is oil soluble, which means you need to eat fat to absorb it. It is naturally found mainly in fish oils, fatty fish, and to a lesser extent in beef liver, cheese, egg yolks, and certain mushrooms. Vitamin D is also naturally made by your body when you expose your skin to the sun, and thus, is called the sun-shine vitamin. In addition, vitamin D is widely added to many foods such as milk and orange juice, and can also simply be consumed as a supplement.
Vitamin E is a group of fat-soluble vitamins which help prevent oxidative stress to the body, and other vitamins within the body. Adequate amounts of vitamin E can help protect against heart disease, cancer, and age related eye damage (macular degeneration). Conversely, too much vitamin E from supplements can lead to excessive bleeding, or hemorrhaging.
Vitamin K is an essential vitamin required for protein modification and blood clotting. Recent studies suggest that vitamin K may play a role in treating osteoporosis and Alzheimer's, and that consuming increased levels of vitamin K can help protect against cancer and heart disease. Unless you are taking medicaiton to prevent blood clots, like Warfarin or Coumadin, there is no known risk of vitamin K toxicity, and no reason not to eat a lot of it. If you are on Warfarin (Coumadin), please check the article on low vitamin K foods for a Warfarin diet. Below is a list of foods high in vitamin K1. The current percent daily value for Vitamin K is 80 micrograms (μg)
Vitamin K is an essential vitamin required for protein modification and blood clotting. Recent studies suggest that vitamin K may play a role in treating osteoporosis and Alzheimer's, and that consuming increased levels of vitamin K can help protect against cancer and heart disease. Unless you are taking medicaiton to prevent blood clots, like Warfarin or Coumadin, there is no known risk of vitamin K toxicity, and no reason not to eat a lot of it. If you are on Warfarin (Coumadin),
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