exposure to sunlight
medulla
You may not be able to absorb vitamin D if you have certain health conditions. This includes mucus buildup in the intestines and liver problems.
Under all conditions within human experience. That is, all non-relativistic conditions.
Liver disease (such as cirrhosis or hepatitis) is a medical condition that can increase vitamin B12 in the body. Some myeloproliferative disorders (for example, polycythemia vera and chronic myelocytic leukemia or CML) can also increase vitamin B12 in the body. Vitamin B12 excess is virtually harmful since it is a water-soluble vitamin. It will just be secreted from the body as urine. The conditions themselves are what is cause for concern. The increased vitamin B12 can just be used as an indicator for the disease.
Describe the body's mechanisms for controlling blood glucose levels under normal and stress conditions.?
No. human body can not synthesize vitamin B 12. You have to consume the same through your food only. Only non-veg food contains the most of the vitamin B 12 you get. Strict vegans should be given injections of vitamin B 12.
The only way to reduce vitamin D in the body is to stop intake of vitamin D.
vitamin D
The skin uses the sun to produce vitamin D. It is not literally absorbed through the skin from the sun, rather vitamin D is produced by the body under the skin in reaction to sunlight. Vitamin D is necessary to keep bones and teeth healthy as it helps to regulate the amounts of phosphate and calcium in the body.
Alfacalcidol is a type of vitamin D used to treat a number of conditions such as osteomalacia (rickets), familial hypophosphatemia, hypoparathyroidism, osteodystrophy, vitamin D deficiency, and so on. Also, this medication is used to increase the levels of vitamin D, calcium, and phosphate in the body. It belongs to a group of medicines called vitamin D analogues.
vitamin c is NOT stored in the body. It is excreted. So, there is no danger of build up of vitamin c in the body , if high doses are taken. Vitamin c is very good for us.
No, vitamins are by definition an essential nutrient that cannot be made by the body in sufficient quantities. Vitamin D is not really a vitamin. The human body can produce this nutrient and it is actually a hormone, not a vitamin.