Source Naturals R-Lipoic Acid is a natural form of lipoic acid that your body can synthesize and safely metabolize Suggested Use: 1 tablet 1 to 2 times daily, preferably between meals. Well Made Supplement: Suitable for vegetarians. Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, starch, preservatives, or artificial color, flavor or fragrance. Over 40 Years of Trust. Source Naturals was created in 1982 by CEO Ira Goldberg to support each individual's potential to enjoy optimal health. Manufactured in the USA. Manufactured in Scotts Valley, CA, under the Good Manufacturing Practices (cGMPs) established by the US Food and Drug Administration (FDA).