The article provides an in-depth review of astaxanthin (AX), highlighting its antioxidant, anti-inflammatory, and neuroprotective properties, as well as its potential applications in human health, aging, and sustainable production from microalgae. In the C60a formula, astaxanthin contributes by enhancing cellular protection against oxidative stress and supporting longevity. This research directly supports the C60a product’s goal by reinforcing astaxanthin’s role as a potent antioxidant that promotes cellular health and vitality.