Eladiet Donnaplus Evening Primrose Oil 150ml syrup. Evening Primrose Oil is a product designed for women in premenstrual period. It is a nutritional supplement for this period with nutrient deficiencies. How to use: The recommended dose is one teaspoon of coffee per day (2.5 ml) equivalent to 5 pearls of Evening Primrose Oil 500 mg. This dose should be taken for at least 12 consecutive weeks to fill the body stores of essential fatty acids. After this time, a lower intake is sufficient to maintain the body's levels. You must keep the jar in a cool dry place. Once opened, store in refrigerator and use within three months. Presentation: Bottle of 150 ml.