There are no special effects of eating onions for men. Onions can provide the body with carbohydrates and other nutrients, but long-term large intake is easy to stimulate the gastrointestinal tract, should be taken seriously. Onion is a common vegetable, in every 100 grams of onion, rich in 89.2g water, 1.1g protein, 9g carbohydrate, 20mg carotene, 8mg vitamin C, 147mg potassium, 39mg phosphorus, etc., can provide a variety of nutrients for the human body. But men eat onions have no special effects and can not achieve the purpose of treating diseases. However, if men eat onions in large quantities for a long time, it may cause irritation to the gastrointestinal tract, inducing stomach pain, burning sensation, diarrhea and other uncomfortable symptoms. It is recommended to consume fresh onions in moderation on a daily basis, and those with weak digestive ability should not eat onions raw or on an empty stomach. When the onion is spoiled, it is also forbidden to eat.