1, fried food production process is unknown, food raw materials may be unhygienic. Many fried raw materials are spoiled or frozen for a long time, through the deep-fried after adding a variety of flavorings, usually no way to taste out, raw materials are not fresh and easy to lead to the human body intake of harmful substances, and in serious cases will also cause cancer. At the same time, the vegetable oil used for deep-frying food is often cooked at high temperatures for a long time, the oil residues of harmful substances, repeated deep-frying of food is harmful to the human body.

2, deep-fried food is delicious and convenient, so by people's popularity, through the oil as a heat exchange medium, making the food become fragrant, coupled with a variety of marinade seasoning, so that the food itself to lose the original flavor. Deep-fried food is easy to scorch black after a long time, producing carcinogenic substances, very unfavorable to human health. In addition contains a large number of trans fatty acids, after entering the human body through the metabolism as well as the transformation, interfere with the body's normal metabolism, resulting in adverse effects.

3, fried food containing trans fatty acids will also increase the risk of cardiovascular disease, many diabetic patients eating fried food aggravation, but also easy to cause fatty acid deficiency, children often eat fried food is not conducive to healthy development. For street food stalls without a health license, the safety of fried food can be imagined, often eat gutter oil and poor quality food, easy to cause cancer.

4, fried food also contains a large amount of aluminum, long-term intake of accumulation in the human body, resulting in the calcification of the organization is affected, is not conducive to the development of bones, easy to lead to osteoporosis, chondromalacia and so on. After high-temperature frying, charred food will produce many harmful chemicals, many fried food will also add alum, the human body is very harmful.

5, fried food is low in nutritional value, contains very little dietary fiber, minerals and vitamins, seasoning most of them contain MSG and salt, it is difficult to ensure health. In addition, fried food is also easy to increase weight, for people with poor intestinal digestion, often eat fried food will further aggravate gastrointestinal conditions, and even cause stomach cancer, intestinal cancer.

Second, how to eat healthier

1. frying food to strictly control the oil temperature, frying food oil temperature is best controlled below 150 ℃, the fire do not burn too much, frying fish and meat do not continuous high-temperature cooking and frying, we must take frequent intermittent frying methods.

2. Hang a layer of starch paste on the outside of the fried fish and meat before frying, can also effectively prevent the formation of heterocyclic amines and mutants.

3. Frying food and oil residue should not be eaten more than once, and should not be eaten frequently in excess. For the dark color, too greasy, bad taste and has been moldy and spoiled fried food, do not eat.

4. When frying food, the oil should not be used continuously for too long, and new oil should be added in time.

5. The oil should be filtered immediately after deep-frying to remove decomposed substances and prolong the service life of the oil. 6. 6. Cooking oil used after repeated frying contains a large number of mutant sources and peroxidized lipids, and should not be consumed.

7. Fried food, it is best to fry now eat.

7.