Astaxanthin: New Meta-Analyses Reveal Modest Metabolic Gains but No Clinical Breakthroughs
Astaxanthin, a carotenoid found in salmon and krill, is often marketed as a 'super antioxidant' for anti-aging and performance enhancement. Recent 2026 meta-analyses indicate it may slightly lower blood glucose and A1c levels in people with prediabetes or type 2 diabetes, but it does not significantly reduce weight or improve athletic performance. While some studies show minor benefits for skin hydration and eye strain, evidence for preventing chronic diseases, neurodegeneration, or boosting metabolism remains insufficient. Safety data suggests an 8 mg daily dose is acceptable for adults, though higher doses lack long-term safety confirmation.