Vitamin B2 (Riboflavin)

Vitamin B2, or riboflavin, helps the body turn food into energy and is needed to activate vitamin B6 and folate. Riboflavin also supports healthy eyes, skin and antioxidant defenses through glutathione. Dairy, eggs, meat, almonds and mushrooms are good sources. Riboflavin turns urine bright yellow, which is normal.

This collection includes riboflavin 100 mg and 400 mg and riboflavin 5'-phosphate, the active form, from brands such as Integrative Therapeutics, Thorne, Bio-Tech, NOW, Nature's Way and Carlson Labs.

How to Choose a Vitamin B2 Supplement

• Riboflavin 400 mg: The high dose used in research on head comfort. Riboflavin 400 mg by Integrative Therapeutics is our top seller.
• Riboflavin 5'-phosphate: The active coenzyme form, such as R5P by Thorne, for people who prefer activated B vitamins.
• Riboflavin 100 mg: A moderate dose for general B2 needs, from NOW, Nature's Way and Carlson Labs.
• Food-based B2: Cataplex B2 by Standard Process is a whole-food option.
• Pairing: B2 helps activate B6 and folate, so it is also included in every B complex.

Bright yellow urine after taking riboflavin is normal and harmless. High-dose riboflavin is usually taken daily for at least three months before judging results. See also B complex and magnesium.

Frequently Asked Questions

What is vitamin B2 good for?

Riboflavin supports energy production, healthy eyes and skin and antioxidant defenses. It also activates vitamin B6 and folate.

Why is riboflavin 400 mg so popular?

400 mg is the daily amount used in studies on head comfort and is often paired with magnesium. It is much higher than the daily value of 1.3 mg.

Why does riboflavin turn urine yellow?

Riboflavin is naturally yellow, and the body releases what it does not need in urine. This is harmless.

What is riboflavin 5'-phosphate?

It is the active form of vitamin B2 that the body uses directly. It is a good choice for people who prefer activated B vitamins.

Related categories: B Complex | Magnesium | CoQ10 | Eye Health | Energy Supplements

*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.