what is the skin responsible for the formation of vitamin D?
605608
You got it backwards, Vitamin D helps the formation of the skin.
431636
The short answer is the small intestine. The small intesting does the primary job of absorption, absorbing the nutrients (i.e., proteins, carbohydrates, lipids, vitamins [water and fat soluble], water and electrolytes. However, the large intestine does absorb the remaining additional water, vitamin B, and some electrolytes.\n\nLike I said, that is the short answer...if you need additional information let me know!
884
Vitamin S aka steroids.
414640
In plant cells, sunlight plays an active part in photosynthesis, which helps a plant grow. In human cells, sunlight stimulates the activation of vitamin D in your body. The term vitamin D actually refers to a group of steroid molecules. Vitamin D3, also known as cholecalciferol is generated in the skin of animals when light energy is absorbed by a precursor molecule 7-dehydrocholesterol. Vitamin D is thus not a true vitamin, because individuals with adequate exposure to sunlight do not require dietary supplementation. There are dietary sources of vitamin D, including egg yolk, fish oil and a number of plants. The plant form of vitamin D is called vitamin D2 or ergosterol
805268
If you are referring to natural Vit D synthesis in our body for calcium absorbtion...10 minutes a day is sufficient.\n\nIf you are referring to mood enhancement...hmmm i guess that is very subjective. Sunlight usually cheers me up...i get moody sometimes when there is prolong rain and the day seems so glummy. How about u?
910943
they contain vitamin D
503511
Get out in the sun more!  If you're fair-skinned, 45 minutes a week is beneficial.  If dark-skinned, a few hours a week.  \n\nHere's other sources of D:\n\nCod liver oil (best source)\nFatty fish such as salmon, mackerel, tuna, sardines, herring\nVitamin D-fortified milk and cereal\nEggs\n\nWatch out taking supplements, you can OD with serious health consequences.
903733
Now thats an intresting question..\nA few senarios that jump to mind are -\na) Vitamin D intoxication: Remember Vit. D is a fat soluble vit. and can accumulate in the body.\n\nb) Granulomatous diseases like sarcoidosis..reason is that they cause an artificial state of vit.D excess due to synthesis of 1,25D3 by the macrophages in the granulomas.\n\nc) Blood malignancies- Myeloma would be the classical one but leukemia and lymphomas too.\n   hypercalcemia is due to bone mets, synthesis of PTH like peptides while the high cell turnover (especially when on chemotherapy- tumor lysis) will cause hyperphospatemia.\n\nd) Solid tumors can also cause the above mentioned senarios for pretty much the same reasons.\n\nHope that helps.
494172
NO, ANY TAN IS ACTUALLY A SYMPTOM OF CELLS THAT HAVE BEEN DAMAGED. TANNING BEDS HURT EVEN WITHOUT BURNING. UVA RAYS MAY BE LINKED TO MELANOMA, PREMATURE AGING, AND IMMUNE SYSTEM DAMAGE. A TAN DOESN'T MAKE VITAMIN D. THOUGH YOU DO NEED SOME SUNSHINE FOR VITAMINS, IT TAKES VERY LITTLE FOR YOUR BODY TO PRODUCE VITAMIN D, FAR LESS THAN IT TAKES TO GET A TAN.
1038350
I just love asking daft questions!\n\nI am a chemist not a dermatologist unfortunately, but I'l give it a go! \n\nWhen skin is burned all the cells which contain the relevant chemicals to maintain the up-keep of living tissue are destroyed-permanantly. Skin is a very complex organ, however damaged skin cells are restored by lots of reactions harmoneously occuring similtaneously, one of which is ascorbic acid(vitiman C) acting as an enzyme for the reaction between hydroxyprolase and hydroxylysine which are the foundation of collagen tissue which builds and restores skin. \n\nIn other words, increasing your water and vitiman C intake may help restore the cells not permanatly damaged and will give you better looking skin in the long run,hope that helps you a little!
293390
Lack of vitamin D causes rickets (insufficient deposition of salts resulting in soft bones). That's the most important you propably wanted to hear. I don't remember anything special about the other vitamins with respect to bone development.
51917
What probably ages the skin most is the UVA and B sun rays.  After taking a good one-a-day vitamin formulated for your age and sex, to insure you are getting at least the minimum required amounts of essential vitamins from your diet as supplimented, consider using a dermatologist approved skin lotion with perhaps SPF 15 sunscreen protection.  If you block the sun with sunscreen, be sure to take enough Vitamin D, to make up for lost Vitamin D, usually received from sun exposure.\n\nDrug stores should have a suitable product such as Lubriderm - Daily UV Lotion.  Read the instructions and keep it out of the eys and away from children.  Good luck.
1185059
D-2 (ergocalciferol) is derived from yeast, while D-3 (cholecalciferol) is derived from lanolin (from sheep) or fish. D-2 and D-3 are both used to fortify milk and other dairy products. Some D-3 vitamin supplements are made with fish oil. D-3 can also be produced by plants and fungi, but this isn't as common as using lanolin or fish as a source
533240
No.\nA vitamin is an organic molecule required by a living organism in minute amounts for proper health. An organism deprived of all sources of a particular vitamin will eventually suffer from disease symptoms specific to that vitamin.\n\nVitamins can be classified as either water soluble, which means they dissolve easily in water, or fat soluble, which means they are absorbed through the intestinal tract with the help of lipids.\n\nIn general, an organism must obtain vitamins or their metabolic precursors from outside the body, most often from the organism's diet. Examples of vitamins that the human body can derive from precursors include vitamin A, which can be produced from beta carotene; niacin from the amino acid tryptophan; and vitamin D through exposure of skin to ultraviolet light.\n\nThe term vitamin does not encompass other essential nutrients such as dietary minerals, essential fatty acids, or essential amino acids, nor is it used for the large number of other nutrients that merely promote health, but are not strictly essential.\n\nThe word vitamine was coined by the Polish biochemist Casimir Funk in 1912. Vita in Latin is life and the -amine suffix is for amine; at the time it was thought that all vitamins were amines.
980377
youl need a tank, a strip light that emits vitamin d and a 60 watt bulb. some reptile shops may sell u a second hand vivarium.
1161684
Well, it depends on which organisms you are looking at. First of all, light/the sun is absolutely essential for all life on the planet, as the sun provides the energy for photosynthesis to take place, which allows the production of glucose. This glucose is then transmitted to consumers who eat the plants.\n\nin terms of humans, light/sunlight is actually pretty essential for the production of vitamin D, because radiation from the sun actually causes skin cells to produce Vitamin D. A deficiency in this vitamin can cause rickets or osteoporosis. So, basically sunlight is important for humans for normal bone growth. Also, the light also affects how light/dark one is, because of tanning. Tanning/darkening of the skin occurs when the body creates more melanin to protect the body.
878872
Sunshine enhances the absorption of Vitamin D which increases dopamine and serotonin levels in the brain and body.