It is produced by cold-pressing the seeds of the evening primrose plant, which are rich in a fatty acid called GLA (gamma-linolenic acid). It contains an effective and concentrated dose of 1,300 mg in one capsule! Solgar evening primrose oil comes in a glass jar with a dark shade that protects against light, heat, and moisture, which can cause spoilage and loss of freshness. No sugar, no preservatives, no food coloring, no salt, does not contain yeast, wheat, soy, milk and its products, sweeteners, artificial flavors, and colors. Compliance with standards: FDA, GMP, HACCP. Instructions for use: One capsule a day with a meal. 60 capsules