Free (unesterified) Lutein
Free (unesterified) Lutein is a tier 1 form of Lutein, used in 1,799 on-market products .
1,799
on-market products
tier 1
quality tier
n/a
elemental fraction
Why this tier: The form used in AREDS2, the largest RCT evidence base for lutein; directly absorbed without requiring ester hydrolysis.
Source: AREDS2 Research Group 2013, JAMA 309(19):2005-2015, PMID 23644932