Riboflavin 5'-Phosphate

6 Reviews

Veg Capsules 60

Riboflavin 5’™ phosphate is the active form of riboflavin, also known as vitamin B2.

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SKU: riboflavin-5-phosphate-THR
60Veg Capsules
In Stock
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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

Riboflavin, also known as vitamin B2, plays a key role in the activation and conversion of other B vitamins. For instance, it is necessary for activation of vitamin B6, conversion of tryptophan to niacin, and conversion of folate to its various active forms. Riboflavin also plays a crucial role in fat and glucose metabolism, red blood cell synthesis, and the production and regulation of certain hormones.

As with many B vitamins, riboflavin must be converted to its active form – riboflavin 5'-phospate (R5P) – in order for it to be utilized by the body. Because absorption of riboflavin occurs in the upper GI tract, a compromised digestive system can adversely affect the body's ability to convert riboflavin to R5P. In addition, certain prescription medications can interfere with the proper absorption of riboflavin and deplete the body of its stores.

  • •the active form of vitamin B2 more readily used by the body
  • •Riboflavin 5'-Phosphate is yeast free

Ratings & Reviews

6 reviews

  • 3 stars
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  • 1 star
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12/28/2011 11:00:00 pm

Works as Advertised

by Brandon -

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

5/7/2015 12:00:00 am

Riboflavin 5 Phosphate

by Mar A.

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

10/10/2015 12:00:00 am


by Annette B.

This is a good product!

Not medical or professional advice

10/10/2015 12:00:00 am

No problems.

by Brian A.

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

Not medical or professional advice

3/18/2017 12:00:00 am

Excellent Supplement To Keep On Hand!

by Deepender -

Use daily for vitamin insufficiencies!

Not medical or professional advice

6/26/2023 4:40:00 pm

Great product

by MDD -

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