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Registered dietitians explain what vitamin B12 is, how much you need, and the potential side effects of taking too much.
The elderly are at increased risk because they tend to produce less stomach acid as they age, a condition known as achlorhydria, thereby increasing their probability of B 12 deficiency due to reduced absorption. [2] Nitrous oxide overdose or overuse converts the active monovalent form of vitamin B12 to the inactive bivalent form. [37]
6% (< 60 years old), 20% (> 60 years old) [ 4 ] Vitamin B12 deficiency, also known as cobalamin deficiency, is the medical condition in which the blood and tissue have a lower than normal level of vitamin B 12. [ 5 ] Symptoms can vary from none to severe. [ 1 ] Mild deficiency may have few or absent symptoms. [ 1 ]
Vitamin B12 is a water-soluble vitamin that plays an essential role in many bodily functions, like red blood cell formation and nerve function. It can be found in foods like beef, fish, and eggs.
Frequency. 1 per 1000 people [8] Pernicious anemia is a disease where not enough red blood cells are produced due to a deficiency of vitamin B 12. [5] Those affected often have a gradual onset. [5] The most common initial symptoms are feeling tired and weak. [4]
B12 is crucial for many important functions, and, with a few exceptions, the only way to get it is through animal-based foods or B12 supplements. “Vitamin B12 is an essential water-soluble ...
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