Supports Eye Health Potent Free Radical Scavenger Healthy Immune System Response Vegetarian/ Vegan Non GMO Kosher A Dietary Supplement General Health Halal Family Owned Since 1968 Quality GMP Assured 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 neutralise 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. This NOW product features Zanthin®, which can help to support overall ocular health and promote a healthy nervous system.