Interdepartmental Graduate Program in Nutritional Sciences, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
J Agric Food Chem. 2010 Mar 10;58(5):2877-81. doi: 10.1021/jf9041326.
Purple carrots contain anthocyanins in addition to the provitamin A carotenoids in typical orange carrots. Simultaneous consumption of these phytochemicals in carrots may affect the bioavailability of carotenoids. The bioavailability of beta-carotene in humans was assessed from an acute feeding of orange (OC) and purple (PC) carrots with white (WC) as a control. Carrot smoothies were served to female subjects (n = 5, aged 21-26 years) for breakfast after 1 week on a low carotenoid diet and overnight fast. OC and PC smoothies were equalized to 10.3 mg of all-trans beta-carotene. Plasma beta-carotene was measured for 144 h following treatments. Peak plasma concentrations of OC and PC treatments did not differ. The PC treatment 0-144 h area-under-the-curve for beta-carotene was 76% of the OC treatment (P < 0.05). However, when the first 24 h were compared, OC and PC treatments did not differ, suggesting that anthocyanins in purple carrots do not affect the absorption of beta-carotene postprandially.
紫色胡萝卜除了富含典型橙色胡萝卜中的维生素 A 原类胡萝卜素之外，还含有花青素。同时摄入这些类胡萝卜素可能会影响类胡萝卜素的生物利用度。从摄入橙色（OC）和紫色（PC）胡萝卜以及白色（WC）胡萝卜的急性饮食中评估了人类β-胡萝卜素的生物利用度，将这些胡萝卜制成的smoothies 作为早餐提供给 5 名年龄在 21-26 岁的女性受试者，在低类胡萝卜素饮食和过夜禁食后进行 1 周。OC 和 PC smoothies 中均含有 10.3mg 的全反式β-胡萝卜素。在处理后 144 小时内测量血浆β-胡萝卜素浓度。OC 和 PC 处理的血浆β-胡萝卜素浓度峰值无差异。然而，PC 处理的 0-144 小时 AUC 为 OC 处理的 76%（P<0.05）。但是，当比较前 24 小时时，OC 和 PC 处理没有差异，这表明紫色胡萝卜中的花青素不会影响餐后β-胡萝卜素的吸收。
