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low stomach acid due to swelling (inflammation) in the lining of the stomach (atrophic gastritis) or certain medicines
However, there is currently no scientific evidence to confirm that vitamin B12 supplements actually help prevent heart disease.
When to see a GP
Foods with B12 are always the first choice, but if you have trouble eating B12-rich foods, or have problems absorbing B12, another potential vitamin B12 source is a multivitamin. In fact, the federal government's Dietary Guidelines for Americans suggest that people older than age 50 take a multivitamin supplement as a way to ensure adequate B12 intake.
People who have issues absorbing vitamin B12, such as those with Crohn’s disease or other gastrointestinal issues, may benefit from B12 injections, which bypass the need for absorption by the digestive tract ( 3). B12 for memory and mood High doses of B vitamins should also not be taken by those with kidney disease unless recommended by a doctor ( 25). The absorption of vitamin B12 can vary from about 56% of a dose of 1 mcg to 0.5% of a dose of 1,000 mcg. Therefore, if someone consumes vitamin B12 less frequently, they will need a higher total amount to achieve a sufficient absorbed quantity.As you age, your body naturally makes less stomach acid and intrinsic factor — both of which can affect the absorption of vitamin B12. But in a few cases when people have taken large amounts of vitamin B6, particularly for more than a few months, the effect can be permanent.
Vitamin B12 supplements are also available in several forms, including tablets, capsules, liquids, and lozenges.Therefore, more research is needed to make sound conclusions on the effect of vitamin B12 supplements on memory and cognitive function. Summary It’s responsible for many bodily functions and may benefit your health in various ways, such as by preventing major birth defects, supporting bone health, improving mood, and maintaining healthy skin and hair. Two large eggs (100 grams) supply about 46% of the DV for vitamin B12, plus 39% of the DV for vitamin B2 ( 35).
Most healthy adults get sufficient B12 from their regular diet. However, it is common for older people to have some level of B12 deficiency. This is often due to a poor diet and less stomach acid, which the body needs to absorb B12 from food. It’s not suitable for everyone. To make sure it’s safe for you, tell your doctor before starting cyanocobalamin if you: Those who consume a diet with no meat or animal-basedproducts such as vegans and strict vegetarians (ovo-vegetarians). Risk increases further in these groups during pregnancy.Also sometimes referred to as cobalamin, vitamin B12 is a water-soluble vitamin that’s essential for several aspects of health. Vitamin B12 deficiency in the beginning stages of pregnancy may increase the risk of birth defects, such as neural tube defects. Furthermore, maternal vitamin B12 deficiency may contribute to premature birth or miscarriage ( 4, 5, 6). One review concluded that vitamin B12 plays a key role in fat metabolism, noting that a deficiency could be linked to increased fat accumulation and obesity ( 3). In a large review, vitamin B12 supplements had no effect on depressive symptoms in the short term but may help prevent relapse over the long term ( 23).
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