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Natural Factors Ultra Prim™ Evening Primrose Oil Description Highly Purified Chemical Free A Source of Omega-6 GLA Ultra Prim is made from the highest quality Evening Primrose Oil, a natural source of the Omega-6 essential fatty acid GLA. Ultra Prim uses an exclusive extraction process, a gentle method that crushes the seed to release its nutritional oil without the application of external heat or harmful solvents like alcohol, hexane and organic chlorines. Directions 1 softgel, 2-3 times per da...