B Complex: What It Actually Does (And What the Evidence Shows)
Our complete guide to vitamin B complex: what it does, who benefits, how much is too much, and how to choose one.
Written by Vita Globe Editorial Team | Reviewed against NIH Office of Dietary Supplements guidance | Updated October 7, 2026
QUICK ANSWER
A vitamin B complex combines several B vitamins that help your body release energy from food, make red blood cells and keep nerves healthy. It helps most if you're low in B vitamins, which is more common in vegans, adults over 50, people who drink heavily and people taking metformin or acid reducers. Extra B vitamins don't add energy if your levels are already fine. Niacin (35mg), B6 (100mg) and folic acid (1,000mcg) have daily upper limits from supplements[1][2][3].
Start here
- What Does a Vitamin B Complex Actually Do?
- Is B Complex Better Than a Single B Vitamin?
- B Complex vs. a Multivitamin: Do You Need Both?
- B Vitamins and Energy: What They Can and Can't Do
How to take it safely
- Best Time to Take a B Complex
- B Complex Side Effects and Upper Limits
- B Complex and Medications
- How to Read a B Complex Label
- B Complex Gummies vs. Pills
- Do Coffee and Alcohol Affect B Vitamins?
Who benefits most
- Signs You May Be Low in B Vitamins
- B Complex for Vegans and Vegetarians
- B Vitamins After 50
- B Vitamins During Pregnancy and Breastfeeding
- B Vitamins and Stress
Each B vitamin explained
Bundles
OUR OPTION
Vita Globe Vitamin B Complex Gummies
One strawberry gummy a day: B12 20mcg, niacin 12mg (as niacinamide), B6 1.2mg, folate 430mcg DFE, biotin 50mcg, pantothenic acid 6mg, vitamin C 10mg and inositol 3.5mg. Vegan, non-GMO and gluten-free, 60 per bottle.
Sources
- NIH ODS. Niacin Fact Sheet for Health Professionals.
- NIH ODS. Vitamin B6 Fact Sheet for Health Professionals.
- NIH ODS. Folate Fact Sheet for Health Professionals.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This content is for informational purposes only and is not a substitute for medical advice.
