Dietary Supplement Standardized to 70% Carvacrol Vegetarian Capsules Source Naturals Oil of Oregano is from wildcrafted true oregano ( Origanum vulgare ), an aromatic herb that is native to the Mediterranean region. Traditionally, oregano was used to support digestive, respiratory and joint health. recent in vitro research indicated that carvacrol, an active constituent of oil of oregano, may provide support to the immune system. Source Naturals Oil of Oregano is the most potent on the market and is standardized to 70% carvacrol.* Suitable for vegetarians. Contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.