75% of cholesterol in the body is produced inside the cell by a substance called acetyl CoA. Therefore, it does not mean that cholesterol level increases just because you take fatty meals. In other words, whether eating a low-fat diet will be useful for your health or not is actually fairly uncertain.
Finland used to be the country with the highest incidence of coronary artery disease in the world, that is, the country with high incidence of CHD, though the incidence decreased very much now. In a study conducted over 15 years, it was found that the mortality rate of the group who took the low-cholesterol diet was twice as high as that of the group who ate whatever they liked.
It has been said so far that over eating of too much cholesterol containing foods such as eggs and shrimp increases cholesterol in the blood causing atherosclerosis, leading to diseases such as myocardial infarction and stroke. However, when the US Department of Health and Human Services and the Ministry of Agriculture's Dietary Guidelines Advisory Committee (DGAC) examined the relationship between cholesterol intake and blood cholesterol, they found there was no evidence of relevance between them.
Scientific Report of the 2015 Dietary Guidelines Advisory Committee writes;
[Cholesterol. Previously, the Dietary Guidelines for Americans recommended that cholesterol intake be limited to no more than 300 mg/day. The 2015 DGAC will not bring forward this recommendation because available evidence shows no appreciable relationship between consumption of dietary cholesterol and serum cholesterol, consistent with the conclusions of the AHA/ACC report. Cholesterol is not a nutrient of concern for overconsumption. ]
However, this does not mean you should take high fat, high cholesterol diet. Do not get me wrong. Especially animal protein contains a large amount of methionine which becomes the source of homocysteine. And this amino acid may increase the risk of CHD events.
The crucial problem is not cholesterol, but it is the quality of lipids you take. That is, it is the type of fatty acids that make up the oil. It is not good if the saturated fatty acids and the ω - 6 unsaturated fatty acids are too much. In particular, if you take excess linoleic acid which is typical ω -6 unsaturated fatty acid, it is eventually metabolized to many malignant eicosanoids. They make you have allergy to many substances, and your platelets are likely to aggregate and, of course, cardiovascular diseases are also likely to occur.
Regarding to benign and malignant eicosanoids, please read ;
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