title: Plasma beta-carotene response in humans after meals supplemented with dietary pectin.
abstract: The purpose of this study was to determine the effect of pectin on plasma response to beta-carotene in humans. Using a crossover design, we evaluated the effect on plasma beta-carotene in seven subjects when 12 g citrus pectin was added to a 2092 kJ (500 kcal) controlled meal with 25 mg beta-carotene. Plasma samples were collected at 0, 8, 30, 48, and 192 h after the meals. Plasma beta-carotene was quantified with the use of HPLC. The increase in plasma beta-carotene concentration was significantly reduced by pectin at 30 and 192 h (paired t test; P less than 0.005 and less than 0.05, respectively). Mean percent increase in plasma beta-carotene concentration at 30 h after the meal with beta-carotene was reduced by more than one-half when pectin was added to the meal. These results indicate that the inhibitory effect of pectin may provide one explanation for observations of reduced plasma beta-carotene response in humans after the ingestion of carotenoid-rich foods when compared with equivalent doses of beta-carotene supplements.
authors.affiliation: Program in Human Nutrition, School of Public Health, University of Michigan, Ann Arbor 48109-2029.
authors.forename: C L
authors.initials: CL
authors.lastname: Rock
authors.forename: M E
authors.initials: ME
authors.lastname: Swendseid
mesh_terms: D000328:Adult; D015992:Body Mass Index; D002338:Carotenoids / Q000008:administration & dosage / Q000097:blood*; D002784:Cholesterol / Q000097:blood; D008076:Cholesterol, HDL / Q000097:blood; D004043:Dietary Fiber / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D010368:Pectins / Q000008:administration & dosage*; D011897:Random Allocation; D019207:beta Carotene
chemical_list: D008076:Cholesterol, HDL; D004043:Dietary Fiber; D019207:beta Carotene; D002338:Carotenoids; D010368:Pectins; D002784:Cholesterol