Thorne Riboflavin 5'-Phosphate is the bioactive form of vitamin B2 that supports methylation and B vitamin formation. Free from gluten and major allergens, it comes in a 60-capsule bottle and is trusted by athletes and health-care practitioners alike.

• Active B2: The active form of vitamin B2 more readily used by the body*
• B Vitamin Formation: Important for the formation of other B vitamins, including niacin and active B6
• Methylation: Provides support for healthy methylation*
• Free From: Every Thorne product is made with the purest possible ingredients - without gluten or other major allergens (eggs, tree nuts, peanuts) This product also contains no soy, dairy, shellfish, or fish
• Trusted: Thorne is chosen by champions and trusted by 100+ professional sports teams, a proud partner of U.S. National Teams, and the #1 recommended clinical brand by health-care practitioners (2023 Health-Care Practitioner Seller Survey)