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Comparison of Lycium barbarum ‐containing Liquid Dietary Supplements to Caffeinated Beverages on Energy/Caloric Metabolism Activity and Salivary Adrenocortical Hormone levels in Healthy Human Adults
Author(s) -
Amagase Harunobu
Publication year - 2010
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.24.1_supplement.540.13
Subject(s) - caffeine , food science , chemistry , aspartame , polyphenol , taurine , lycium , phenylalanine , endocrinology , medicine , antioxidant , biochemistry , alternative medicine , amino acid , pathology
Impact of L. barbarum ‐containing liquid dietary supplements on energy metabolism was compared to caffeinated beverages (tea, coffee and other commercially available products). The tested products were GoChi ® (non‐caffeinated L. barbarum juice); Chi3 ® (caffeinated L. barbarum juice with B vitamins, folate, taurine, L‐phenylalanine, N‐acetyl‐L‐tyrosine, glucuronolactone and green tea extract); and TAI slim ® ( L. barbarum juice with caffeinated standardized tea polyphenols, soluble dietary fiber, L‐phenylalanine and N‐acetyl‐L‐tyrosine). Subjects (age=34.5 y) took single bout of 1 serving of test samples after a 12 h fast. Resting metabolic rate (RMR) was measured by indirect calorimeter immediately before (baseline), 1, 2 and 4 h after sample intake. Salivary cortisol and DHEA levels were analyzed by EIA one day prior and post intake. While non‐ L. barbarum ‐containing caffeinated beverages did not increase area under the curve (AUC, 0–4 h) of RMR from the control level (395 kcal‐h), all L. barbarum ‐containing products increased RMR AUC by 752–927 kcal‐h over baseline (1,761 kcal), higher than the control or other beverages (P<0.05). Unlike caffeinated beverages, cortisol and DHEA were significantly reduced by GoChi intake. These results suggest that L. barbarum ‐containing products exhibit energy stimulating effect, which may be related to acute adrenocortical hormonal reduction, a different mechanism than that of caffeine.