Standardized extract (EGCG / catechins / polyphenols declared)
Standardized extract (EGCG / catechins / polyphenols declared) is a unrated form of Green Tea Extract, used in 701 on-market products .
Typical standardization: EGCG, total catechins or total polyphenols declared as a % of the extract (varies by product)
Why this tier: The form that matches the literature's EGCG-based dose basis, and the one carrying the hepatotoxicity caution (EFSA: >=800 mg EGCG/day as supplement raised transaminases; USP label caution), but efficacy/safety was not compared across standardization levels, so it is not ranked. A row named "EGCG" declares the catechin itself, not the extract, and is kept unresolved (never summed with extract mg).
Source: EFSA ANS Panel 2018, EFSA J 16(4):e05239, PMID 32625874; Oketch-Rabah HA et al. 2020, Toxicol Rep 7:386-402, PMID 32140423