The disadvantages of eating too much garlic are as follows: 1. It is easy to damage the mucous membrane of the gastrointestinal tract because the sulfur-containing chemicals and allicin in garlic have a corrosive effect on the mucous membrane of the gastrointestinal tract, which can cause gastritis, gastric ulcer, enteritis and intestinal ulcer if too much is consumed. 2. From the perspective of Chinese medicine, garlic is warm and hot, so if too much is eaten, it can cause yin deficiency and fire, resulting in 3. If you eat too much garlic, it may cause a decrease in taste buds, leading to a decrease in appetite and tastelessness.