Effect of acute ingestion of fresh and stored lettuce (Lactuca sativa) on plasma total antioxidant capacity and antioxidant levels in human subjects
- 1 December 2002
- journal article
- clinical trial
- Published by Cambridge University Press (CUP) in British Journal of Nutrition
- Vol. 88 (6), 615-623
- https://doi.org/10.1079/bjn2002722
Abstract
The present study investigated whether storage under modified-atmosphere packaging (MAP) affected the antioxidant properties of fresh lettuce (Lactuca sativa). Eleven healthy volunteers (six men, five women) consumed 250 g fresh lettuce, and blood was sampled before (0 h) and 2, 3 and 6 h after consumption. The protocol was repeated 3 d later with the same lettuce stored at 5°C under MAP conditions (O2–N2(5:95, v/v)). Results showed that after ingestion of fresh lettuce, plasma total radical-trapping antioxidant potential (TRAP), measured as area under the curve, was significantly higher (1·3 (SEM 0·3) MMOL/L PER 6 H;Pp-coumaric acid were significantly different from baseline values (P≤0·05) 2 and 3 h after fresh lettuce ingestion. Caffeic acid increased significantly at 3 h (PPPPP<0·05) at 0, 2, 3 and 6 h respectively. No changes were observed after ingestion of MAP-stored lettuce for all the measured markers. Our present results showed that ingestion of MAP-stored lettuce does not modify plasma redox status in healthy subjects. Further research is needed to develop post-harvesting techniques able to preserve the bioactive molecule content of plant food.Keywords
This publication has 30 references indexed in Scilit:
- Oxidative StressPublished by Elsevier BV ,2007
- Plant polyphenols in cancer and heart disease: implications as nutritional antioxidantsNutrition Research Reviews, 2000
- Is the endogenous peroxyl-radical scavenging capacity of plasma protective in systemic inflammatory disorders in humans?Free Radical Biology & Medicine, 2000
- Antioxidants in Human Health and DiseaseAnnual Review of Nutrition, 1996
- Antioxidant Capacity of Tea and Common VegetablesJournal of Agricultural and Food Chemistry, 1996
- Accumulation of β‐carotene in normal colorectal mucosa and colonic neoplastic lesions in humansNutrition and Cancer, 1995
- Tutorial review—Multi-electrode array detectors in high-performance liquid chromatography: a new dimension in electrochemical analysisThe Analyst, 1993
- Optimization of a quantitative HPLC determination of potentially anticarcinogenic flavonoids in vegetables and fruitsJournal of Agricultural and Food Chemistry, 1992
- Fruit, vegetables, and cancer prevention: A review of the epidemiological evidenceNutrition and Cancer, 1992
- Modified atmosphere packaging of fruits and vegetablesCritical Reviews in Food Science and Nutrition, 1989