1, hazelnut is a high-fat nuts, containing a large amount of fat, should not be consumed too much, consuming too much can easily cause fire. Therefore, it is recommended to eat hazelnuts must be moderate.

2, hazelnut rich in oil and protein, these two nutrients in the human gastrointestinal tract are not very easy to digest and absorb. Hazelnut containing oil is supposed to promote the body's absorption of fat-soluble vitamins, but too much consumption is likely to lead to hazelnut in the gastrointestinal tract deposition, causing indigestion.

3, hazelnut has a special flavor, people in the consumption of hazelnut often can appetite, appetizing effect. However, hazelnut is rich in fat, after consuming too much hazelnut, people will feel greasy, gastrointestinal discomfort, seriously affecting people's appetite for other foods, but will reduce appetite.

4, hazelnut contains a lot of fat, protein and sugar, 100g hazelnut kernel contains fat 49.7g, protein 15.9g, less sugar, calorie can reach 590 calories, therefore, hazelnut is not suitable for excessive consumption, easy to lead to obesity. Although most of them are unsaturated fatty acids, but hazelnut is still not advisable to eat, eat too much easy to cause obesity.