Micronutrients & recovery
Antioxidant capacity (measured by TEAC and ORAC assays) in green tea dietary supplements is strongly correlated with total polyphenol content, but absolute values vary widely across products.
Higher polyphenol content generally means higher antioxidant capacity in green tea supplements. However, because the actual polyphenol content varies widely (14-36% of tablet weight) and labels are often inaccurate, you cannot assume a high antioxidant value based on the product name alone. Look for products that specify actual polyphenol or EGCG content verified by testing.
The antioxidant activities for GTDS determined by TEAC and ORAC were well-correlated with each other and with the total polyphenol content... TEAC and ORAC values for GTDS ranged from 187 to 15340 and from 166 to 13690 (cid:237)mol Trolox/g for tablet or capsule, respectively.
Why this rating
Strong statistical correlation (r=0.98 for TEAC/ORAC, r=0.95 for polyphenols) across 19 products.
Source
Catechin and Caffeine Content of Green Tea Dietary Supplements and Correlation with Antioxidant Capacity
Navindra P. Seeram et al. · Journal of Agricultural and Food Chemistry · 2006
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →