What Is Vitamin B Complex? Vitamin B complex is a supplement that contains eight B vitamins that perform important and related roles in your body’s cellular function. The vitamins that make up B ...

Vitamin B complex supplements usually contain all eight B vitamins. A person may consider taking these supplements to prevent vitamin B deficiency. Share on Pinterest Research suggests that vitamins ...

Taking too much vitamin B6 can cause nerve damage and numbness in hands and feet. Niacin at high doses can cause flushing and ...

If you need more B vitamins, Nordic Naturals, Thorne, and Klean Athlete all offer quality supplements. See what else our dietitians recommend, and learn if a B complex supplement is right for you.