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Thorne Research, Riboflavin 5' Phosphate - 60 Vegetarian Capsules

  • $27.09
  • $25.00

the bioactive, tissue ready form of riboflavin*

  • the active form of vitamin B2 more readily used by the body*
  • important cofactor for formation of other B vitamins, including niacin and active B6
  • necessary for methylation pathways in the body*
  • not derived from yeast

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.

Suggested Use Take 1 capsule one to three times daily or as recommended by your health-care practitioner.

Supplement Facts
Serving Size: One Capsule
 Each Capsule Contains:% DV
Riboflavin (as Riboflavin 5' - Phosphate Sodium)36.5 mg2,147%
Daily Value (DV)

Other Ingredients

Microcrystalline cellulose, hypromellose (derived from cellulose) capsule, silicon dioxide.


Tamper Evident: Use only if bottle is sealed.

If pregnant, consult your health-care practitioner before using this product.

Store tightly sealed in a cool, dry place.

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