In the United States, the UK, and Australia, concentrations of vitamin B12 in the blood are measured in different units. To provide a consistent comparison, the reference ranges for each country ...

This essential vitamin is generally considered safe, even at high doses. However, most people get enough B12 through diet alone, and unnecessary supplementing may lead to negative side effects.

Vitamin B12 is found naturally in a range of foods, including beef liver, clams, oysters, yogurt, eggs, and cheese, according to the National Institutes of Health (NIH). Given how much vitamin B12 ...

While vitamin B12 might not be as buzzy as calcium or an immediately recognizable household name like Vitamin C or D, it's just as important for your health—and particularly your brain health.

Research suggests that lower levels of vitamin B12, even within the normal range, may contribute to cognitive decline in older adults. One of the key findings is that individuals with lower B12 ...

Meeting the minimum requirement for vitamin B12, needed to make ... with lower concentrations of B12, but still in the normal range, showed signs of neurological and cognitive deficiency.

These conditions may include: Vitamin B12, also called cobalamin, helps regulate the nervous system and plays a role in the growth and formation of red blood cells. Vitamin B12 deficiencies can ...

Feeling low-energy? You could be among the estimated 3.6% of Americans who are deficient and 12.5% who get insufficient amounts of vitamin B12. Everyone requires a certain amount of B12 depending ...