Introduction: Nowadays, there are always some people who do not eat certain foods such as garlic, ginger, onion, and so on. However, they do not realize that these foods have a lot of health effects on human body. 

Ginger——to promote perspire and bring down the fever
Ginger contains gingerol, a variety of vitamins, resin, starch, fiber, and a small amount of minerals. It can promote blood circulation, stimulate gastric secretion, excite intestinal tract, promote digestion and increase appetite. What's more, ginger can also kill oral and intestinal bacteria, so as to clean the mouth. In the hot summer, eating ginger can also play the effect of promoting perspire and bringing down the fever, and can alleviate fatigue, weakness, anorexia, insomnia, abdominal pain, and so on. However, it is worth noting that, although ginger is good for human body, it is not suitable for the hemorrhoids patients.

Garlic——to resist against virus
Garlic contains protein, fat, carbohydrates, B vitamins, vitamin C and other nutrients, as well as sulfur, selenium compounds (allicin), and a variety of active enzymes. Eating garlic can prevent influenza and treat fungal infection. In addition, it can also bring down the level of blood pressure, blood fat, and blood glucose, and has a strong anti-cancer effect. It is one of the most effective plant antibiotics by now. However, those who suffer from diarrhea, hemorrhoids, gastrointestinal bleeding and eye diseases should not eat garlic.

Pepper——to relieve pain
Pepper contains limonene, unsaturated organic acids and volatile oil. It can invigorate the stomach and expel toxins out of the body. What's more, it is also effective for the treatment of vomiting, joint muscle pain, dysentery, and so on. Modern pharmacological research also has found out that, pepper has some anesthetic and analgesic effect, and can inhibit the growth of various bacilli and cocci. However, those who suffer from bronchial asthma, diabetes and gout, or pregnant women should not eat pepper.

Onion——to prevent atherosclerosis
Onion contains various kinds of nutrients, such as protein, sugar, crude fiber, selenium, thiamin, riboflavin, prostaglandin A, amino acids and so on. Its volatile oil contains some substance——diallyl disulfide, which can lower the level of cholesterol. What's more, onion also has the effect of clearing away heat, eliminating phlegm, lowering blood sugar, promoting digestion, preventing colds, and so on. And it can also prevent and treat atherosclerosis disease and has an anti-cancer effect. However, people with eye diseases or fever should not eat onion.