Finley D A, Lönnerdal B, Dewey K G, Grivetti L E
Am J Clin Nutr. 1985 Apr;41(4):787-800. doi: 10.1093/ajcn/41.4.787.
Milk from vegetarians contained a lower proportion of fatty acids derived from animal fat and a higher proportion of polyunsaturated fatty acids derived from dietary vegetable fat. No significant differences were observed between dietary groups in percent fat in the milk or in proportions of fatty acids synthesized de novo in the mammary gland. Among women consuming less than 35 g animal fat per day, percent milk fat was significantly correlated with animal fat intake. Among women consuming greater than 35 g animal fat, percent fat in milk was positively correlated with percent of C10:0, C12:0, and C18:3 and negatively correlated with percent of C16:0 and C18:0 in the milk fat. These findings suggest that there is a maximum amount of C16:0 and C18:0 that can be taken up from the blood and subsequently secreted into the milk.
素食者的乳汁中，来自动物脂肪的脂肪酸比例较低，而来自膳食植物脂肪的多不饱和脂肪酸比例较高。在乳汁中的脂肪百分比或乳腺中从头合成的脂肪酸比例方面，不同饮食组之间未观察到显著差异。在每天摄入动物脂肪少于35克的女性中，乳汁脂肪百分比与动物脂肪摄入量显著相关。在每天摄入动物脂肪超过35克的女性中，乳汁中的脂肪百分比与乳脂中C10:0、C12:0和C18:3的百分比呈正相关，与C16:0和C18:0的百分比呈负相关。这些发现表明，血液中能够被吸收并随后分泌到乳汁中的C16:0和C18:0存在最大量。
