Taking vitamin B12 as a pill, spray, or shot. Commonly used by vegans, older adults, and people on metformin to help support energy, nerve health, and red blood cells.
Vitamin B12 supplements have not reliably prevented heart disease, even though low blood levels are linked to higher risk.
A review in Nutrition Journal explored [Vitamin B12 Supplementation](/health-practices/supplements-botanicals/vitami
Taking extra B12 has not consistently prevented major heart problems, though stroke prevention showed the most promise.
The review examined past research on [Vitamin B12 Supplementation](/health-practices/supplements-botanicals/vitamin-b12