The disadvantages of eating too much garlic are as follows: 1. It can damage the mucous membrane of the gastrointestinal tract because garlic is rich in allicin and sulfur-containing chemicals, and if these ingredients are consumed in excess, they have a strong stimulating and damaging effect on the mucous membrane of the gastrointestinal tract, and excessive intake of garlic can cause inflammation and ulcers in the gastrointestinal tract; 2. From the perspective of Chinese medicine, garlic is pungent and warm, so if you eat too much of it, it can cause an increase in internal deficiency fire, which can easily cause sore throat, red eyes, and blurred vision, which can affect the overall health of the body.