Natural astaxanthin is a carotenoid antioxidant taken from the microalgae *Haematococcus pluvialis*. The natural form may absorb better than synthetic versions, which can boost antioxidant activity in the body.
People use it to support skin health against UV-induced oxidative stress and to ease muscle soreness after exercise. Others take it for general eye health support.
Take astaxanthin with a meal that contains fat to help your body absorb it. Mild digestive upset can happen with high doses. Anyone using blood thinners or with a bleeding disorder should check with a healthcare professional first. Its safety during pregnancy or breastfeeding is not yet confirmed.