How often should the frying oil be changed

Fried foods are usually very popular in life. Many people like to eat fried foods. We all know that when making fried foods, oil is generally needed. When frying things, we all know that it is best not to reuse the oil several times. If you often eat such fried things that are repeatedly used, it is harmful to your health. How often should the frying oil be changed?

How often should you change the frying oil?

Generally, it needs to be determined based on the frying temperature, frying amount and frequency of use, and not simply based on time. The intuitive judgment is that it is time to change it if the smoke volume is large and the color becomes darker. A more scientific way is to test the peroxide value.

What harm will frequent consumption of fried foods have on the body?

1. Causes obesity.

Fried foods, whether they are Western fast food or our old traditional Chinese fried dough sticks and fried cakes, are all high-fat foods. It smells good and tastes delicious, but once it’s put into your stomach, the high fat content is not conducive to digestion, which not only affects your stomach and intestines, but also causes obesity. For your slim body, it is better to eat less. Obesity can also cause many health problems, such as high blood pressure, cardiovascular and cerebrovascular diseases, etc.

2. Produce toxic and harmful substances.

Repeated high-temperature heating of oils and fats will produce toxic and harmful substances. Because after repeated high-temperature heating of oils and fats, the unsaturated fatty acids in them produce polymers that are highly toxic. Most fried and baked foods, especially French fries, contain high concentrations of acrylamide, a carcinogen.

3. Nutrients are severely damaged.

When food is fried at high temperature, the various nutrients in it are severely destroyed. High temperatures can fry and spoil proteins, reducing their nutritional value. They can also destroy fat-soluble vitamins in food, such as vitamin A, carotene and vitamin E, hindering their absorption and utilization by the human body.

4. The aluminum content seriously exceeds the standard.

Many people often eat fried dough sticks and fried cakes for breakfast. However, due to the addition of alum, the aluminum content is seriously exceeded. Excessive intake of aluminum can be harmful to the human body. Aluminum is an amphoteric element, which means that aluminum can react with both acids and alkalis. The compounds formed after the reaction are easily absorbed by the intestines and can enter the brain, affecting the intellectual development of children and may cause Alzheimer's disease in the elderly. In addition, the dough used to make fried dough sticks is treated with alum, which makes it highly alkaline and causes the loss of vitamin B1.

5. Induce diseases.

Fried foods are high in fat and difficult to digest. Eating fried foods frequently can cause indigestion, chest fullness after eating, and even nausea, vomiting, diarrhea, etc. People who often eat fried foods are prone to getting inflamed and constipated due to lack of vitamins and water.