Vitamins and Minerals Folian Quatrefolic 400µg new generation, 30 capsules Swanson SWA34 €4.22 The dietary supplement contains an incredibly active and patented form of Quatrefolic folate in the form of methyltetrahydrofolic acid, 400 µg of which is the equivalent of 800 µg of the glucosamine salt of (6S)-5-methyltetrafolic acid. Add to cart