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血液中的胆固醇若堆积太多会使血管阻塞硬化,而造成心脏疾病、脑中风。好的胆固醇(高密度脂蛋白胆固醇HDL)可以减少胆固醇在血管壁堆积；坏的胆同醇(低密度脂蛋白胆固醇LDL)会加速血管硬化。饱和脂肪酸高的油脂,如动物性油脂、椰子油、棕榈油、植物性奶油(玛琪琳)会刺激血胆固醇上升。精制糖会刺激另一种血脂肪三酸甘油酯的上升,而造成好的胆固醇(HDL)下降。降低血胆固醇的方法之一：以多元不饱和脂肪酸取代饱和脂肪酸。亚麻油酸及次亚麻油酸属于多元不饱和脂肪酸,是人体必须从食物中取得。以单元不饱和脂肪酸(橄榄油)取代饱和脂肪酸,不但会降低胆固醇,好的胆固醇(HDL)也不会减少。蛋黄摄取量一周不应超过3～4个,蛋白则不需限制。膳食纤维的功能：干扰胆固醇被人体吸收,也可与胆酸及胆盐结合而将胆固醇排除于体外。
If the accumulation of too much blood cholesterol will block the blood vessels and cause heart disease, stroke. Good cholesterol (high density lipoprotein cholesterol HDL) can reduce the accumulation of cholesterol in the blood vessel wall; bad bile alcohol (low density lipoprotein cholesterol LDL) will accelerate hardening of the arteries. High saturated fatty fats, such as animal fats, coconut oil, palm oil, vegetable butter (marjoram) will stimulate blood cholesterol. Refining sugar stimulates the rise of another triglyceride, resulting in a drop in good cholesterol (HDL). One of the ways to lower blood cholesterol is to replace saturated fatty acids with polyunsaturated fatty acids. Linolenic acid and linolenic acid are polyunsaturated fatty acids, the human body must obtain from food. Replacing saturated fatty acids with monounsaturated fatty acids (olive oil) not only lowers cholesterol but does not reduce good cholesterol (HDL). Egg yolk intake should not exceed 3 to 4 per week, while protein is not limited. The function of dietary fiber: interfere with the absorption of cholesterol by the body, but also with cholesterol and bile salts and cholesterol will be excluded from the body.