Hazelnut oil has no efficacy and effect, moderate consumption of hazelnut oil can supplement the body with unsaturated fatty acids and other nutrients, but should not eat too much hazelnut oil. Hazelnut oil belongs to the food, does not have the efficacy and effect of drugs. But 100 grams of hazelnut oil contains 884 kilocalories of energy, 100 grams of fat, 7.4 grams of saturated fat and other nutrients, the rest of the unsaturated fatty acids, usually eaten in moderation full of hazelnut oil, can be supplemented for the body of the required nutrients and energy. Hazelnut oil unsaturated fatty acid content in about 90%, moderate consumption, beneficial to cardiovascular health. Due to the relatively high fat content in hazelnut oil, usually to avoid excessive intake, so as not to cause the accumulation of fat in the body, thus inducing obesity. It is recommended to eat hazelnut oil in moderation, and the people during the weight loss period should eat less hazelnut oil, peanut oil, lard and other high fat content of food.