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Humans get Vitamin D from the sun, and it is necessary for bone growth. People who do not get enough Vitamin D will experience improper bone growth, among other problems, and will die earlier.
Wiki User
∙ 9y ago
Wiki User
∙ 10y agoYes, the requirement for production of Vitamin "D" in the skin has lead to the geographic selection of white and black coloured humans.
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Why whites are white and blacks black?
It is an adaptation to sunlight intensity, the risk of sunburn, and the need to manufacture vitamin D in the skin with the help of sunlight.In Africa where modern humans evolved the sunlight intensity is strong and risk of sunburn is high, dark skin evolved to protect from sunburn and there was no problem making more than enough vitamin D.As modern humans migrated out of Africa they entered areas with less sunlight, vitamin D deficiency diseases began to be a problem but the risk of sunburn was much lower, light skin evolved to raise vitamin D production.The fact that we can now take vitamin D supplements and can use sunscreen to prevent sunburn has removed those selection pressures, so skin color differences will no longer be driven by natural selection. Instead they will most likely be controlled by personal preferences and sexual selection in the future.
Which of the vitamin will not be synthesized in a person confined to a dark cell for a long time?
Vitamin D is not synthesized in the body when a person is confined to a dark cell for a long time. However, it can be obtained through diet or supplements. Vitamin D is primarily synthesized in the skin in response to sunlight exposure, so lack of sunlight would hinder its natural production in the body.
Name two fat-soluble and 2 water soluble vitamin?
vitamin D is produced by the body from exposure to sunlight and vitamin k is produces by the body in the large intestine by bacteria wiki on! :)
Which vitamin provides for the absorption of calcium and phosphorus by bones and teeth?
Vitamins A , C and D. Calcium also helps
What does the D stand for in vitamin D?
The term "vitamin D" refers to several different forms of this vitamin. ergocalciferol (vitamin D2) and cholecalciferol (vitamin D3). Vitamin D2 synthesized by plants. Vitamin D3 is synthesized by humans in the skin. D is the fourth letter in the Latin alphabet and the vitamin D was the fourth vitamin discovered.
Which is a good source of vitamin d?
There is no known good natural source of vitamin D other than exposure to sunlight. If needed, there are always Vitamin D supplements, however these aren't as efficiently absorbed compared to the natural source.
What vitamin do you get from sunlight?
Natural sunlight is an excellent source of vitamin d. The skin absorbs vitamin d from the sun's rays, but it is still essential to use sunblock to prevent skin damage.
Does vitamin D supplement interact with natural vitamin D?
Believe it or not, it doesn't matter if you take a vitamin D supplement, acquire it through your diet or your skin makes it with the help of the sun. All sources of vitamin D supply the same chemical formulation.
Where can you naturally get vitamin d from?
All mammals can naturally synthesise vitamin D from cholesterol via sunlight. All ingested forms of vitamin D are actually additives or supplementary; there is no vitamin D in milk or other staple foods (it is added, and therefore not natural). Strictly speaking, vitamin D is not a vitamin at all, as a vitamin is, by definition, a chemical compound that cannot be synthesised by an organism.
What is the difference between natural vitamin d and synthetic vitamin d pills?
Your question depends upon what kind of natural vitamin D you are talking about and what kind of vitamin D pills you are talking about. There are two kinds of natural Vitamin D. 1)Sunshine is the best and most efficient way to get your Vitamin D. If you are fair skinned, you can make up to 20,000 IU of Vitamin D in one half hour of full body exposure. A feedback loop prevents you from EVER overdosing on Vitamin D from sunshine. 2) Natural Vitamin D is present in only a few foods - fatty fish and sun exposed mushrooms being the only real significant sources. There is no real difference between natural food source vitamin D and synthetic pills. The only difference is that it would be next to impossible to overdose on food sourced vitamin D. The answer to the question of synthetic Vitamin D pills, is that there are 2 kinds. Vitamin D2 is the most common kind, and the only kind found in prescription Vitamin D pills and shots. Some researchers claim that Vitamin D2 should not be used for supplementation or enrichment of foods due to its decreased potentcy. Vitamin D3 is less common in supplements, but is absorbed much better and has a longer half-life, making it the clear winner for human supplementation
Why was natural selection an important contribution to the theory of evolution?
D
Where can we get vitamins d?
sunshine and fish are natural sources of vitamin D, or over the counter supplements.
What natural element does kelp contain?
It contains minerals for vitamin D
Does Vitamin D help asthma decrease?
Vitamin D alone is not believed to decrease Asthma. Vitamin D has been shown to increase the effect of Steroids when used to treat asthma. Hear is a link that will explain the use of vitamin D and Steroid in asthma treatment http://pittsburgh.cbslocal.com/2011/04/21/can-vitamin-d-help-asthma-sufferers/
What contains vitamin D or vitamin A?
Sunshine contains the best and most efficiently absorbed vitamin D. A fair skinned person can make up to 20,000 IU's of Vitamin D in a half and hour with no risk of ever overdosing on vitamin D. Fatty fish and cod liver oil are the richest natural sources of vitamin d. Sun dried or UV light exposed mushrooms contain a surprising amount of vitamin D, up to 2500 IU's per serving. These are virtually the only significant natural vitamin D sources. Many other foods are fortified with vitamin d by the manufacturers: Bread, milk and some orange juices are fortified, but the amounts vary and the stated amount of vitamin d on the label is not always the amount the food actually contains.
Why whites are white and blacks black?
It is an adaptation to sunlight intensity, the risk of sunburn, and the need to manufacture vitamin D in the skin with the help of sunlight.In Africa where modern humans evolved the sunlight intensity is strong and risk of sunburn is high, dark skin evolved to protect from sunburn and there was no problem making more than enough vitamin D.As modern humans migrated out of Africa they entered areas with less sunlight, vitamin D deficiency diseases began to be a problem but the risk of sunburn was much lower, light skin evolved to raise vitamin D production.The fact that we can now take vitamin D supplements and can use sunscreen to prevent sunburn has removed those selection pressures, so skin color differences will no longer be driven by natural selection. Instead they will most likely be controlled by personal preferences and sexual selection in the future.
Which of the vitamin will not be synthesized in a person confined to a dark cell for a long time?
Vitamin D is not synthesized in the body when a person is confined to a dark cell for a long time. However, it can be obtained through diet or supplements. Vitamin D is primarily synthesized in the skin in response to sunlight exposure, so lack of sunlight would hinder its natural production in the body.
