Gulati S K, Cook L J, Ashes J R, Scott T W
Lipids. 1978 Nov;13(11):814-9. doi: 10.1007/BF02533482.
Feeding 1-2 g/day of cholesterol protected against ruminal hydrogenation caused a 20-30% drop in the secretion of milk fat by goats and cows. The effect was observed with goats fed conventional rations or with goats and cows fed rations supplemented with protected lipids, but was not observed with cows fed conventional rations, or when unprotected cholesterol and protected beta-sitosterol was fed to these animals. The results suggest that this depression in milk fat is due to a decreased uptake of plasma triacylglycerol fatty acids by the mammary gland, induced by dietary cholesterol.
每天喂食1 - 2克胆固醇以防止瘤胃氢化作用，这导致山羊和奶牛的乳脂肪分泌量下降了20 - 30%。在喂食传统日粮的山羊身上，以及在喂食添加了保护性脂质日粮的山羊和奶牛身上都观察到了这种效果，但在喂食传统日粮的奶牛身上未观察到这种效果，或者当给这些动物喂食未受保护的胆固醇和受保护的β-谷甾醇时也未观察到这种效果。结果表明，乳脂肪的这种降低是由于日粮胆固醇诱导乳腺对血浆三酰甘油脂肪酸的摄取减少所致。
