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血浆中的胆固醇和三酰甘油都有两来源:外源性者来自食物,经消化后由小肠吸收;内源性者由体内合成三酰甘油在肝内合成,而胆固醇主要在肝和小肠粘膜合成。机体有复杂的反馈机制调节胆固醇的吸收、合成、分解及排泄,保持其血中浓度的动态平衡。血清胆固醇主要来自体内合成,肠道的吸收量受到机体的严格调控,并不与进食的胆固醇量成正比。如每人每天胆固醇摄入量增加100毫克,血清胆固
Plasma cholesterol and triglycerides have two sources: exogenous from food, absorbed by the small intestine after digestion; endogenous by the body synthesis of triacylglycerol in the liver synthesis, and cholesterol mainly in the liver and small intestine mucosa synthesis. The body has a complex feedback mechanism to regulate cholesterol absorption, synthesis, decomposition and excretion, to maintain the dynamic balance of blood concentration. Serum cholesterol mainly from in vivo synthesis, intestinal absorption by the body’s strict regulation, not proportional to the amount of cholesterol consumed. As per person per day increased cholesterol intake 100 mg, serum cholesterol