Astaxanthin is a naturally occurring carotenoid with a unique structure that is known to be a potent free radical scavenger. Because Astaxanthin freely crosses the blood-brain and blood-retina barriers, it can neutralize free radicals in the eye and central nervous system. Scientific studies also demonstrate that Astaxanthin can support the body’s healthy and balanced immune system responses. Our NOW natural and organic Supplements are an effective way to ensure you and your loved ones are getting essential vitamins, minerals and nutrients for daily optimal health. Since 1968, NOW has been making top quality products that are tested to the highest standards to empower people to lead healthier lives. Our promise - what is on the label, is precisely what is in the bottle.