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European Journal of Clinical Nutrition (2007) 61, 536541 & 2007 Nature Publishing Group All rights reserved 0954-3007/07 $30.00 www.nature.com/ejcn
ORIGINAL ARTICLE Efficacy of as1-casein hydrolysate on stress-related symptoms in women
JH Kim1, D Desor2, YT Kim3, WJ Yoon3, KS Kim4, JS Jun5, KH Pyun1 and I Shim1
1Department of Integrative Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea; 2Laboratoire de Neurosciences Comportementales, Unit de recherche sur lAnimal et les Produits Animaux, Universit Henri Poincar, Institut National Polytechnique de Lorraine/Institut National de la Recherche Agronomique, Facult des Sciences, Vandoeuvre Les Nancy Cedex, France;
3Department of Pharmaceuticals and Health Foods, Lotte R&D Center, Seoul, Korea; 4Department of Family Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea and 5Department of Psychiatry, Inha University Hospital, Incheon, Korea
Objective: To examine the effects of as1-casein hydrolysate on females with stress-related symptoms.
Design: Double-blind, randomized, crossover, placebo-controlled trial.
Setting: The as1-casein hydrolysate was manufactured by INGREDIA (Arras, France) and the placebo was manufactured by DIETAROMA (Bourg, France). Study was designed and performed at PROCLAIM (Rennes, France), and the statistical analyses were performed by D Desor (Nancy, France).
Subjects: A total of 63 female volunteers suffering from at least one disorder that may be related to stress such as anxiety, sleep problems and general fatigue.
Interventions: A total of 63 volunteers participated in a double-blind, randomized, crossover, placebo-controlled study. Subjects were randomly allocated to receive either tablets containing as1-casein hydrolysate or placebo at the dose of 150 mg/ day for 30 days. After a 3 weeks washout period, they were crossed over for a new 30-day period of tablets intake. The outcome measure was a questionnaire including 44 items of symptoms that may be related stress in which the severity of each sign was evaluated using a 10-degree scale. These measures were studied repeatedly at the day of 0, 15 and 30 after the start of each interventional period.
Results: The 30-day treatment by as1-casein hydrolysate in females with stress-related symptoms reduced their symptoms, particularly in digestion (Po0.01), cardiovascular (Po0.05), intellectual (Po0.01), emotional (Po0.05) and social problems (Po0.05).
Conclusion: This study showed that a 30-day ingestion of as1-casein hydrolysate decreased the stress-related symptoms in females suggesting that this product may be used as an effective functional...