Crystalline Pure, Yeast Free Twinlab Folic Acid Caps are easier to swallow and assimilate. Well tolerated by the most highly allergic individuals .Â No tablet binders, coatings or colorings. Free of the most common allergens such as corn, yeast, rice, barley, wheat, lactose (milk sugar) and all milk citrus, fish and egg products. No added flavorings, sugars, salt, artificial sweeteners, colorings, preservatives or salicylates. Packaged in a glass bottle for maximum stability, quality and freshness. This product is manufactured at our own state-of-the-art facility.