B12 from diet vs supplements: Which is better for heart health, immunity?

• Vitamin B12 is a critical component of the diet and can be found in animal food sources.
• Vitamin B12 and its available forms have been the subject of ongoing research.
• A recent comprehensive review discusses key aspects of vitamin B12 and components of natural versus synthetic forms of the vitamin.

Vitamin B12 is important for several things, including proper formation of red blood cells and central nervous system function. The vitamin comes from animal sources, but can be added to plant sources, too.

Vitamin B12 is available in natural and synthetic forms, and a recent comprehensive review discusses the two, as well as how vitamin B12 relates to different health conditions, like megaloblastic anemia.

The review was published in Cureus.