Astaxanthin ni keto karotenoide yakuwe muri Haematococcus Pluvialis kandi ibora ibinure. Ibaho cyane ku isi y’ibinyabuzima, cyane cyane mu mababa y’inyamaswa zo mu mazi nka shitingi, igikona, amafi, n’inyoni, kandi igira uruhare mu gutanga amabara.Bakina ibintu bibiri mu bimera na algae, bikurura ingufu zoroheje zifotora no kurinda chlorophyll ituruka ku kwangirika k'umucyo. Twabonye karotenoide binyuze mu gufata ibiryo bibikwa mu ruhu, birinda uruhu rwacu gufotora.
Ubushakashatsi bwerekanye ko astaxantine ari antioxydants ikomeye ikora inshuro 1.000 kurusha vitamine E mu kweza radicals yubusa ikorwa mu mubiri. Radikal yubusa ni ubwoko bwa ogisijeni idahindagurika igizwe na electron zidakozwe neza zibaho zinjiza electron ziva kuri atome zindi. Iyo radical yubuntu imaze gukora hamwe na molekile ihamye, ihinduka mo molekile ihamye yubusa, itangiza urunigi rwimikorere yubusa. radicals yubuntu. Astaxanthin ifite imiterere ya molekile idasanzwe nubushobozi bwiza bwa antioxydeant.