People who are allergic to black garlic should not eat black garlic, while people who are not allergic to black garlic, usually eat black garlic in moderation can supplement the body with carbohydrates and other nutrients. Black garlic is fresh garlic fermented in the fermentation box, if the human body is allergic to garlic, to avoid eating black garlic, to prevent eating black garlic after the skin itching, rashes, breathing difficulties and other allergic reactions. Generally 100g of black garlic contains 66.6g of water, 4.5g of protein, 0.2g of fat, 27.6g of carbohydrates, 1.1g of ash, 0.04mg of thiamine, 0.60mg of niacin, 7.0mg of vitamin C, as well as minerals such as 117mg of phosphorus, 302mg of potassium and 39mg of calcium. If the organism is not allergic to garlic, usually eat black garlic can add nutrients to the body. It is recommended to eat black garlic in moderation, should not eat too much black garlic, otherwise it is easy to stimulate the gastrointestinal tract.