Swanson Bioperine Nutrient Absorption Enhancer is the one supplement that makes all others work better. Bioperine, a standardized extract from black pepper (piper nigrum), is the only product from piperine to obtain a patented status for its ability to increase the bioavailability of nutritional compounds. It is also the only source from piperine to have undergone clinical studies in the U.S. to substantiate its safety and effectiveness. Animal lovers appreciate the fact that Bioperine can be used for pets, too!