1, overnight meal. Overnight vegetables may produce nitrite, which is a carcinogen, eating in is very harmful to human health. In addition to vegetables, other foods overnight must be preserved to avoid deterioration.

2, roadside stalls. Roadside stalls breakfast is difficult to ensure hygiene, but also mixed with dust, car exhaust and other harmful ingredients. Many young office workers are eating while walking, so the disease is more harmful to health from the mouth.

3, snacks for breakfast. Usually hungry can eat appropriate snacks, but snacks for breakfast is very unscientific. Fasting can not eat sugar, sugar will destroy the body's acid-base balance and metabolic balance, the human body's health is unfavorable.

4, fruit. Bananas, pineapples, oranges, hawthorn, persimmons, these fruits, if eaten on an empty stomach will make excessive secretion of gastric acid, destroying the body's digestive system.