1, containing additives. In order to make canned food more delicious, additives such as spices, pigments and artificial flavoring agents will be added during processing, which will be harmful to human body if eaten frequently.
2. Loss of vitamins. After canning, about 10%~60% of vitamin C, 20%~80% of vitamin B, nearly 10% of vitamin P and 15%~20% of vitamin A are lost.
3. Many canned fruits contain high sugar content, which is ingested into human body as a liquid carrier, so that the absorption rate of sugar is greatly increased, blood sugar is greatly increased in a short time after eating, and the pancreatic load is aggravated. At the same time, due to high energy, it will lead to obesity.