Greater Absorption

Thorne’s 5-MTHF includes an active ingredient that is tissue-ready and in its most bioavailable form for better use by the body.*

One study found a 600-percent greater blood level of 5-MTHF after supplementation with 5-MTHF compared to folic acid supplementation.*

(Source: Willems F, Boers G, Blom H, et al. Pharmacokinetic study on the utilization of 5-methyltetrahydrofolate and folic acid. . . . Br J Pharmacol 2004;141:825-830.)

Well-Researched Benefits

In conjunction with vitamin B12, 5-MTHF functions as a methyl-group donor, which facilitates the conversion of the undersirable amino acid homocysteine to the more desirable methionine.* Methyl-group donation is vital to many necessary biochemical conversion processes, including the synthesis of serotonin, melatonin, and DNA.*

Trusted Manufacturer

Sourcing Exceptional Ingredients

Manufacturing the Right Way

We manufacture our own products to ensure full supply chain transparency. For more than 30 years, we have invested in clean manufacturing practices. We refuse to use ingredients that can inhibit absorption. We perform our final production in the United States.

Four Rounds of Testing

We perform four rounds of testing for each product we manufacture – far above the industry standard. Thorne has invested in two state-of-the-art in-house laboratories that enable us to conduct four rounds of testing, including raw material testing, in-process batch testing, finished product testing, and expiration date stability testing for each lot of product that we manufacture.

Our Impact

We’re thinking sustainably to protect our environment. We believe the environment should never be compromised for the sake of business gain. At Thorne, we believe that doing our part to protect the environment and its most valuable resources goes hand in hand with our product quality standards.