<p>The objectives of the study were to define the dose-response relation of the amount of added oil and: 1) the absorption of carotenoids, phylloquinone and tocopherols in salad vegetables and 2) the absorption of retinyl palmitate formed from the ingested provitamin A carotenoids, |A- and |A-carotene. Women (n = 12) each consumed 5 salads containing equivalent amounts of carrot, cherry tomato, romaine lettuce and spinach. The salads with salad dressings containing 0, 2, 4, 8 or 32 g tocopherol-stripped soybean oil were ingested in random order separated by !Y 2 weeks. Blood samples were collected at baseline and 2, 3.5, 5, 7, and 9.5 h postprandially. Chylomicron fractions were extracted and analyzed by HPLC with coulometric array electrochemical detection. When the salads were ingested with 0 g oil, there was negligible absorption of |A- and |A-carotenes, lutein, lycopene, phylloquinone, retinyl palmitate, |A- and |?-tocopherols. For |A- and |A-carotenes, lycopene, retinyl palmitate, and |A- and |?-tocopherols, absorption was increased with each amount of oil compared with 0 g oil (P <0.05). Starting from 4 g oil, all analytes (|A-carotene, |A-carotene, lutein, trans-lycopene, vitamin A, |A-tocopherol, |?-tocopherol, and vitamin K1) showed significant increases in absorption compared with 0 g oil salad dressing. The absorption of each carotenoid and fat-soluble vitamin was highest with 32 g ingested oil (P < 0.002).
| Identifer | oai:union.ndltd.org:PROQUEST/oai:pqdtoai.proquest.com:1596916 |
| Date | 17 September 2015 |
| Creators | Agustiana, Agatha |
| Publisher | Iowa State University |
| Source Sets | ProQuest.com |
| Language | English |
| Detected Language | English |
| Type | thesis |
Page generated in 0.0017 seconds