What is Astaxanthin? Astaxanthin is a multipurpose red-orange carotenoid. Haematococcus pluvialis is the richest source of natural astaxanthin. Astaxanthin has antioxidant (reference) and anti-inflammatory (reference) actions. In-vitro studies show that Astaxanthin has immune-enhancing effects (reference). It will be interesting to see if this tran...