Health Aid Evening Primrose Oil 500mg capsules combine cold-pressed evening primrose oil with vitamin E in an easy-to-take supplement form. Each capsule contains 500mg of evening primrose oil with 10% GLA (gamma-linolenic acid) and is hexane-free. This supplement comes in a pack of 30 capsules and is currently available with a buy 2 get 1 free offer. The evening primrose oil is cold-pressed to preserve its natural properties and beneficial compounds. The addition of vitamin E helps protect the oil from oxidation while providing its own nutritional benefits. The capsules are hexane-free, indicating they are produced without using this chemical solvent in the extraction process.