write the function and source of vitamin ADE andK
Answers
Answer:
vitamin A
Function
Vitamin A supports several functions throughout the body. Some of the most important functions it supports include vision and the immune system.
Dietary sources
Vitamin A can be obtained through natural sources. Some sources include:
fish liver oil
liver of animals
butter
Animal sources provide the active components to help create retinols within the human body.
Some plants also provide pro-vitamin A compounds known as carotenoid antioxidants. The most common is called beta carotene, which can be found in foods such as:
kale
carrots
spinach
vitamin D
Function
Once vitamin D is absorbed into the bloodstream, the liver and kidneys change calciferol into calcitriol, the biologically active form of vitamin D.
When used in the body, vitamin D performs two major roles:
bone maintenance
immune system support
Dietary sources
Vitamin D absorption is one of the only arguments for a person exposing large, unprotected areas of skin to the sun. When exposed regularly, people can actually absorb enough rays to produce vitamin D to function properly, without need for supplements.
However, many people do not spend hours in the sun. When people do, they are also often covered in sunscreen and clothing. As a result, a person is not likely to absorb as much vitamin D through sunlight alone.
Instead, people can obtain vitamin D through some food sources, including:
fish oil
fatty fish
mushrooms exposed to ultraviolet light
fortified dairy products
Vitamin E
Function
As an antioxidant, vitamin E protects fatty tissues from free radicals that can cause cancer. Some water-soluble vitamins, such as C and B, help aid vitamin E's functions.
In higher doses, vitamin E can also function as a blood thinner.
Dietary sources
Vitamin E is most abundant in seeds, vegetable oils, and nuts. Some of the best sources of vitamin E include:
wheat germ oil
sunflower seeds or oil
hazelnuts
almonds
Vitamin K
Function
The main role that vitamin K plays in the body is blood clotting. However, vitamin K can also help with:
reducing risk of heart disease
bone health
reducing the buildup of calcium in the blood
Dietary sources
Vitamin K-1 and K-2 are found in a variety of sources. Some of these sources include:
kale
liver
spinach
parsley
butter
egg yolks