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A red carotenoid pigment, C40H52O4, produced by certain bacteria, fungi, and green algae and found in wild salmon, trout, and some crustaceans. It is used in animal feed to impart color and as an antioxidant.

[From New Latin Astacus, former genus name of Homarus gammarus, the species of lobster from which the pigment was first extracted (from Latin astacus, lobster, from Greek astakos, variant of ostakos; see ost- in Indo-European roots) + xanth(o)- + -in.]
References in periodicals archive ?
Astaxanthine secured apoptotic death of PC12 cells induced by beta-amyloid peptide 25-35: its molecular action targets.
The in vitro effects of Xancor, a synthetic astaxanthine derivative, on hemostatic biomarkers in aspirin-naive and aspirin-treated subjects with multiple risk factors for vascular disease.
Astaxanthine treatment significantly decreased hepatic conversion of XDH to XO and tissue protein carbonyl levels following IR injury.