Natural esterified astaxanthin from Haematococcus pluvialis algae extract
Natural esterified astaxanthin from Haematococcus pluvialis algae extract is a unrated form of Astaxanthin, used in 392 on-market products .
392
on-market products
unrated
quality tier
n/a
elemental fraction
Why this tier: A row whose own name is the algal source (e.g. "Haematococcus pluvialis Extract") declares biomass mass, not astaxanthin, and is kept unresolved rather than counted. By far the most common labeled source (the single most frequent on-market raw_form, ~180 rows for the bare string alone) and the material in most human trials, but no verified head-to-head human study compared algal esters against free/synthetic or krill-derived astaxanthin at equal dose, so it is not ranked.
Source: Park JS et al. 2010, Nutr Metab 7:18, PMID 20205737 (efficacy trial; source form not compared)