Botanical initiative for the Dietary Supplement Ingredient Database: green tea pilot study (245.7)

Abstract

According to 2007‐2010 NHANES, 7.5% of the US population reports taking botanical dietary supplements (DS). One of the botanical ingredients in DS most commonly consumed and studied for its health benefits is green tea. Green tea consumption is associated with decreased risk for mortality, cardiovascular disease and cancer. However, DS labels and label databases provide only partial information about levels of bioactive components in botanicals. In the Dietary Supplement Label Database, 795 products list green tea ingredients in a variety of matrices, both with and without amount/serving data. Complete composition information for botanical DS must be determined analytically so researchers can obtain more accurate estimates of total intake for these bioactives. Green tea DS are being analyzed in a pilot study in order to determine ingredient variability and matrix/methodology limitations as the first step for the DSID Botanical Initiative. Multiple products from >25 green tea DS matrices are being analyzed for total polyphenols (spectrophotometry) and 7 catechins, caffeine and L‐theonine (HPLC/UV or /MS) in 3 labs. National studies for the DSID Botanical Initiative will estimate the level of green tea ingredients and other flavonoids in DS identified with a nationwide sampling plan.Grant Funding Source: Supported by ARS‐USDA and ODS‐NIH