Astaxanthin is a natural substance found in microalgae, krill and such seafood as salmon, trout and shrimp. It's a carotenoid, so it's related to vitamin A, beta-carotene and the other carotenoids lutein and zeaxanthin. It may have antioxidant and anti-inflammatory properties. If so, then it's possible that astaxanthin is part of the reason why fish and seafood are good for you (along with being low in calories and rich in healthy omega-3 fats).
Carotenoids in general are thought to be beneficial for your health because of their antioxidant capacity. Population studies show that people who eat diets rich in carotenoids tend to have a lower risk of cardiovascular disease. But it's really not possible to know how much of that benefit is due to any specific foods or carotenoids.
Salmon, trout and shrimp are all good sources of astaxanthin. They're low in calories and total fat, plus they contain the essential omega-3 fatty acids. Here are a few healthy recipes that feature salmon, trout and shrimp:
- Garlic Shrimp Tapas Recipe - Gambas al Ajillo
- Easy Grilled Salmon with Pomegranate Vinaigrette
- Salmon Fillet with Avocado Sauce
- Grilled Trout with Parsley
Of course, strong evidence isn't always necessary for a natural substance to be extracted, packed into pills and sold as a dietary supplement. Astaxanthin is marketed with the claims that it supports muscle endurance, improves sperm quality, promotes healthier skin and is good for your vision. But these claims are made with little or no evidence.
Astaxanthin appears to be safe, but right now there isn't any evidence that the supplements will help prevent or treat any health condition. You're probably better off getting your astaxanthin from such foods as salmon and trout, and skipping the supplements. And always, speak to your healthcare provider before taking any dietary supplements.
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