Vitamin B12: What It Can Do, and What It Can’t

Vitamin B12 supplements are hailed as a remedy for everything from weight loss to infertility to Alzheimer’s. Do they really help?

Vitamin B12: What It Can Do, and What It Can’t
photo of man taking supplement

Vitamin B12 supplements are hailed as a remedy for everything from weight loss to infertility to Alzheimer’s. Do they really help?