The Benefits of Astaxanthin

What You Need to Know About Astaxanthin

Astaxanthin is found naturally in microalgae and in fish such as salmon. Alexandre Tremblot de La Croix/Moment/Getty Images

Astaxanthin is an antioxidant found in certain algae and several types of seafood (including salmon, shrimp, and lobster). Also available in supplement form, astaxanthin is considered a carotenoid (a class of antioxidants that includes beta-carotene and lycopene.

Uses for Astaxanthin

Some alternative medicine proponents claim that astaxanthin can prevent or treat a variety of health conditions, including:

Astaxanthin is also said to reduce inflammation, improve skin, boost athletic performance (it is often said to help long distance runners or triatheletes), and stimulate the immune system. In addition, some proponents suggest that applying astaxanthin to the skin can help prevent or treat sunburn.

Benefits of Astaxanthin

The health benefits of astaxanthin have yet to be extensively examined in scientific studies. Here's a look at several findings from the available research on astaxanthin's potential benefits:

1) Heart Disease

Several studies indicate that astaxanthin shows promise for protection against heart disease. In a 2009 report published in Future Cardiology, for instance, researchers note that astaxanthin may help fight oxidative stress and inflammation (two key factors in the development of cardiovascular disease).

Analyzing findings from eight clinical trials (including a total of about 180 participants), the report's authors note that more studies are needed to determine the potential benefit of astaxanthin for people with (or at risk for) heart disease.

2) Immune System

Astaxanthin may boost the immune system, according to a small study published in Nutrition & Metabolism in 2010.

For the study, 14 healthy young women took 0, 2, or 8 mg of astaxanthin daily for eight weeks. Study results showed that astaxanthin helped enhance immune response and reduce levels of a biomarker linked to DNA damage. In addition, astaxanthin helped reduce levels of C-reactive protein (a marker of inflammation).

3) Skin

Preliminary findings from animal-based studies and test-tube research suggest that astaxanthin may shield the skin from damage caused by exposure to the sun's ultraviolet rays. However, more research is needed before astaxanthin can be recommended for defense against sun damage.


To date, little is known about the potential side effects associated with long-term use of astaxanthin. If you're considering the use of astaxanthin supplements, consult your doctor for help in determining a safe dosage.

It's important to keep in mind that supplements haven't been tested for safety and dietary supplements are largely unregulated. In some cases, the product may deliver doses that differ from the specified amount for each herb.

In other cases, the product may be contaminated with other substances such as metals. Also, the safety of supplements in pregnant women, nursing mothers, children, and those with medical conditions or who are taking medications has not been established. You can get further tips on using supplements here.

Using Astaxanthin for Health

Due to the limited research, it's too soon to recommend astaxanthin as a treatment for any condition. It's also important to note that self-treating a condition and avoiding or delaying standard care may have serious consequences. If you're considering using astaxanthin, make sure to consult your physician first.


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Karppi J, Rissanen TH, Nyyssönen K, Kaikkonen J, Olsson AG, Voutilainen S, Salonen JT. "Effects of astaxanthin supplementation on lipid peroxidation." Int J Vitam Nutr Res. 2007 Jan;77(1):3-11.

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Disclaimer: The information contained on this site is intended for educational purposes only and is not a substitute for advice, diagnosis or treatment by a licensed physician. It is not meant to cover all possible precautions, drug interactions, circumstances or adverse effects. You should seek prompt medical care for any health issues and consult your doctor before using alternative medicine or making a change to your regimen.

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