Thorne Research Riboflavin 5'-Phosphate

60 Veg Capsules
7 Reviews
The body requires a lot of nutrients to function, but they often have to be converted first. For optimal B2 supplementation, skip the conversion step and get straight to health.
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    Product Details

    Brand: Thorne Research

    Product Code: riboflavin-5-phosphate-THR

    Servings per Container: 60

    Quantity per Container: 60 Veg Capsules

    Second-to-None B2 Support

    Just because riboflavin is called vitamin B2 doesn't mean it's a second-rate nutrient. Riboflavin is key to health-supporting functions including nutrient conversion and energy and antioxidant production. Activate your health with active Riboflavin 5 Phosphate by Thorne Research.

    Riboflavin 5 Phosphate is the active form of vitamin B2 necessary for the activation and conversion of other B vitamins as well as a variety of important functions necessary for good overall health.

    Supporting other B vitamins, riboflavin helps activate B6 and also converts tryptophan into niacin (B3) and folate into its active forms.

    Riboflavin is also important for energy production, helping to metabolize fat and glucose. It's also needed for red blood cell synthesis and the production and regulation of certain hormones.

    In addition, riboflavin may help the body produce its natural antioxidant, glutathione, which helps protect cells from free radical damage that can contribute to an array of serious health conditions.

    Of course, none of this is possible until riboflavin is converted to its active form. For individuals with digestive disorders, this can be easier said than done. To ensure effective supplementation for everyone, Thorne Research provides riboflavin in its active form, Riboflavin 5 Phosphate, allowing the body to utilize riboflavin immediately and effectively.

    Actively support your health with active B2. Order Riboflavin 5 Phosphate today.

    Doctor Trusted Brand

    Professional-grade products adhere to the strictest standards for purity and potency, and use the highest-grade ingredients available.

    Customer Reviews


    7 reviews

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    • (1)
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    • (0)

    MDD -

    Great product

    My nutritionist recommended the R5P form of riboflavin as the body doesn't have to convert it before use. He said to use this one from Thorne because it's so clean (that is, no dyes, bad fillers, chemicals or gelatin caps that may have glyphosate). I've been taking it for some time. Works great and I've had no reactions, despite being overly sensitive to many foods and supplements.

    Not medical or professional advice


    Deepender -

    Excellent Supplement To Keep On Hand!

    Use daily for vitamin insufficiencies!

    Not medical or professional advice


    Annette B.


    This is a good product!

    Not medical or professional advice


    Brian A.

    No problems.

    My naturopath asked me to take this. A lot of supplements give me reactions, but this one has not.

    Not medical or professional advice


    Susie H.

    One of the Best Online Resources

    Natural Healthy Concepts is my favorite place to find the vitamin, herbal and homeopathic supplements I use. They give nice discounts and free shipping to members (membership is free), plus they ship very quickly. Thanks for making my supplement-buying an easy, pleasurable task!

    Not medical or professional advice


    Mar A.

    Riboflavin 5 Phosphate

    We dont tolerate all Bs yet so is very good to be able to purchase them separately and adjust our dose as necessary. Thanks.

    Not medical or professional advice


    Brandon -

    Works as Advertised

    works great for energy. May not be noticeable on its own but combined with other b-vitamins it can be incredibly potent.

    Not medical or professional advice