Joint Flex

Best Joint Flex Featuring UC-II uses a standardized, undenatured (or "native") type II collagen complex derived from chicken sternum cartilage.

About Doctor's Best

Doctor's Best produces products with the highest quality raw materials available on the market. They have direct control over and are an integral part of every aspect of product production, from formulation and raw material sourcing to finished product manufacturing. We directly purchase all active ingredients used in our products and use only the highest quality ingredients.

Every product is thoroughly researched and backed by the latest scientific studies conducted in the field. The formulations reflect the amounts of ingredients shown to be beneficial based on the results of scientific investigations. Doctor's Best uses patented, trademarked ingredients backed by scientific studies and clinical research. They never use insignificant quantities to enhance the label.

Doctor's Best directly purchases only the highest grade raw materials from proven and reputable suppliers to be put into product formulations. All raw material suppliers go through their stringent vendor qualification process, which includes a multi-step investigation including all aspects of the production and handling procedures, to insure the highest level of quality is reached.