Hussein L, el-Tohamy M
National Research Center, Department of Nutrition, Giza.
Int J Vitam Nutr Res. 1989;59(2):229-33.
Thirteen young Egyptian males with initial low plasma retinol level were divided into three groups and received single oral vitamin A dose of 200,000 IU, or carotene supplement in the form of boiled spinach leaves, providing roughly 617 RE/day or carrots providing 394 RE/day. The three supplements were equally effective, when the plasma retinol level was measured 40 days later. On a price basis, the vitamin A capsules and the carrots were much cheaper than the spinach supplement.
13名最初血浆视黄醇水平较低的年轻埃及男性被分为三组，分别接受单次口服200,000国际单位的维生素A，或以水煮菠菜叶形式补充胡萝卜素（每天约提供617视黄醇当量），或食用胡萝卜（每天提供394视黄醇当量）。40天后测量血浆视黄醇水平时，这三种补充剂的效果相同。从价格方面来看，维生素A胶囊和胡萝卜比菠菜补充剂便宜得多。
