unspecified/undisclosed form
unspecified/undisclosed form is a unrated form of Zeaxanthin, used in 1,075 on-market products .
1,075
on-market products
unrated
quality tier
n/a
elemental fraction
Why this tier: Label discloses only "Zeaxanthin" with no isomer. The largest RCT (AREDS2) dosed 2 mg zeaxanthin together with 10 mg lutein, so zeaxanthin-alone evidence at a defined isomer is not available to rank.
Source: AREDS2 Research Group 2013, JAMA 309(19):2005-2015, PMID 23644932