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Vitamin B12 is absorbed in the terminal ileum (the last part of the small intestine). The process of absorption occurs by dietary B12 becoming bound to R-protein in the saliva, the B12 is then cleaved from R-protein by the acidic conditions in the stomach. Gastric parietal cells secrete a substance called Intrinsic Factor, which binds the B12. In the terminal ileum there are receptors for intrinsic factor and both are absorbed. Problems with this absorption can occur if the body makes auto-antibodies to intrinsic factor, this means there is problems with B12 absorption and a condition called pernicious anaemia can result. The answer you wanted is the first line, but I hope the extra information is either helpful or of interest. Pete (medical student in the UK)
What else can I help you with?
Would the body store vitamin c or d and why?
The body will store Vitamin D first because it's a fat-soluble vitamin which means it can be dissolved in fat. Once it's dissolved in fat, it can be stored in the body. Vitamin C is a water-soluble vitamin which means it needs to be dissolved in water before the body can/will store it.
Which vitamin's might your body store c or d and why?
Vitamin D is the vitamin that your body can store because it can be synthesized and stored in fat cells for later use. Vitamin C, on the other hand, is not stored in the body and any excess is excreted through urine.
How do you reduce vitamin D in body?
The only way to reduce vitamin D in the body is to stop intake of vitamin D.
Which vitamin is synthesized in your body by sun rays?
vitamin d
Which vitamin can not be made in human body?
vitamin D
What vitamin is synthesized in the skin with exposure to the sunlight?
Vitamin D is produced by ultraviolet radiation on your skin. The UV light converts a precursor molecule to vitamin D.
How many types of vitamins can the body absorb?
The body stores Vitamin D in tissue and can store 60 or even 90 days worth. A daily dose of 600 IU is recommended. Vitamin D is a fat-soluble vitamin so it is stored in fat tissue.
Does the liver store vitamin d?
Yes
What is the physiology of vitamin D in the body?
Vitamin D is a fat-soluble vitamin, meaning it is able to be dissolved in fat.
Vitamin C and A are important for good health. Which of these might your body store?
Vitamin A. Humans cannot store Vitamin C.
What Vitamins come from sunlight?
Vitamin D. The body produces vitamin D when sunlight (ultraviolet light) strikes the skin.
Which vitamin can be made in the body after exposure to ultraviolet UV rays from the sun?
Vitamin D. It is made from cholesterol in response to extended exposure to sunlight.
