Patients with poor gastrointestinal condition should not eat raw garlic, mainly because raw garlic is a spicy food, which will stimulate the gastrointestinal mucosa. Patients with poor gastrointestinal condition usually have congestion and edema in the gastrointestinal mucosa, and if they eat spicy garlic, it will cause the congestion and edema in the gastrointestinal mucosa to increase, which may induce abdominal distension and abdominal pain. And raw garlic can also promote the secretion of gastric juice, which may lead to discomfort symptoms such as acid reflux and heartburn in patients. People with poor gastrointestinal condition can eat cooked garlic because the pungent taste of cooked garlic will be reduced and will not cause irritation to the gastrointestinal mucosa. Allicin in garlic has anti-inflammatory and antiseptic effects and can be combined with proteins and vitamins in food to facilitate digestion and absorption, and can also play a role in promoting metabolism and preventing tumors.