100% PURE® products are truly 100% pure: no synthetic chemicals, chemical preservatives, artificial fragrances, artificial colors, harsh detergents or any other unhealthy toxins. Rather than using chemical preservatives, 100% PURE® uses natural preservatives and anti-bacterial herbs. It has several other unique proprietary technologies that distinguish the company from competitors. 100% PURE® uses unique technology to stabilize active ingredients from oxidizing and also has a proprietary 100% natural preservative system, using Japanese Honeysuckle, Thyme, Oregano, Goldenseal, Rosemary, Lavender and a high concentration of vitamins and antioxidants, to preserve all products. On each product, there is an open jar symbol with a number on it. That number indicates how long you can use the product once it is opened.