Top 10 Best Vitamin B2 (Riboflavin) Supplements 1. Nutricost Vitamin B2 (Riboflavin) 400mg, 120 Capsules 2. Nature’s Way Vitamin B2 100 mg Riboflavin, 100 Capsules (Pack of 2) 3. BioTech Pharmacal – B2-400 Riboflavin – 100 Count 4. NOW Foods…