There are two sources of cholesterol, one is through food intake, which is called exogenous cholesterol; Second, it is synthesized by our body itself, which is called endogenous cholesterol. Usually, the ratio of exogenous cholesterol to endogenous cholesterol is 4:6. If we avoid cholesterol in food all the time, then endogenous cholesterol will increase synthesis, and its ratio will increase to 2:8, or even 1:9.
Extended data
Standard intake of cholesterol
Cholesterol mainly comes from the body's own synthesis, and cholesterol in food is a secondary supplement. For example, an adult with a weight of 70kg has about cholesterol 140g in his body, and it is updated about 1g every day, of which 4/5 is metabolized in his body, and only 1/5 needs to be supplemented from food, and each person can take 200mg of cholesterol from food every day to meet his physical needs.
The absorption rate of cholesterol is only 30%. With the increase of cholesterol content in food, the absorption rate will decrease. 200mg is about equivalent to the cholesterol content in 1 egg or the cholesterol absorption of 3-4 eggs. Experts suggest that it is better to take 50mg~300mg of cholesterol every day.
Baidu encyclopedia-cholesterol