Ultra Prim is made from the highest quality evening primrose oil, a natural source of the omega-6 essential fatty acid gamma-linolenic acid (GLA). GLA is a fatty acid that is important for healthy inflammatory response, immune response, and promotes women’s health by providing nutritional support for PMS. * The oil is extracted by cold pressing, also called expeller pressing. This gentle method crushes the seed to release its nutritional oil, without the application of external heat or harsh solvents such as hexane. Cold pressing enhances stability and helps preserve the nutritional components of the oil. Ultra Prim is also ultra-purified to remove any organic residues or impurities, giving you a stable product without preservatives.