Vitamin B12 plays an important role in keeping your body functioning properly, although it's often overlooked. It's involved in everything from energy production and muscle repair to supporting your mood and nervous system, and it also contributes to healthy hair growth. Despite its importance, many people don't get enough of it.
Experts say older adults and people following vegan or vegetarian diets are among those most at risk of a vitamin B12 deficiency. However, it's not limited to these groups. Younger people can also become deficient, particularly if they don't eat a balanced, nutrient-rich diet.
