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GREEN TEA REPORT

Labdoor analyzed 10 best-selling green tea supplements in the United States for caffeine, primary catechin and total polyphenol content, and heavy metal (arsenic, cadmium, lead, mercury) contamination.

Products ranged from containing less than 38.1% of its label claim to having more than 86.8% more than its label claim for an active ingredient group - total polyphenols, primary catechins, EGCG (epigallocatechin gallate) or caffeine. All products recorded heavy metal concentrations under the USP limit.

Analytical chemistry methods used to generate this report include High Performance Liquid Chromatography (HPLC) to quantify caffeine, total polyphenols, and individual catechins and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) to screen for heavy metals. Tests for individual catechins consist of measurements for epigallocatechin (EGC), epicatechin (EC), epigallocatechin gallate (EGCG), and epicatechin gallate (ECG).