What are the health effects of frequently eating leftover food?

Generally, frequently consuming leftover food can lead to malnutrition, reduced appetite, food poisoning, impaired digestive function, and an increased risk of cancer. If discomfort occurs after eating leftovers, it is recommended to seek medical attention promptly. The specific effects are as follows:

1. Malnutrition

Nutrients in leftover meals are easily lost during repeated reheating. Regular consumption may result in insufficient nutrient intake, leading to malnutrition.

2. Reduced Appetite

The color, aroma, and taste of leftover food tend to deteriorate, and the flavor often becomes less appealing. Frequent consumption may decrease appetite and even lead to厌食 (loss of appetite).

3. Food Poisoning

If leftovers are stored for too long or improperly, they may harbor various pathogenic microorganisms. Ingesting such food can cause symptoms of food poisoning, such as nausea and vomiting.

4. Impaired Digestive Function

During storage, fats and proteins in leftovers may undergo oxidation and denaturation, producing harmful substances. These substances can irritate the gastrointestinal tract upon ingestion, impairing digestive function and causing indigestion, bloating, and abdominal pain.

5. Increased Cancer Risk

The nitrite content in leftover food may increase over time. In the acidic environment of the stomach, nitrites can be converted into nitrosamines, and long-term intake may elevate the risk of cancers such as gastric and liver cancer.

In daily life, it is advisable to maintain a positive mindset, avoid spicy, stimulating, and greasy foods, get adequate rest, and develop healthy lifestyle habits.