What Are the Benefits of Astaxanthin?

In What Is Astaxanthin? we covered where this red algae pigment comes from and how strong an antioxidant it really is. So what does the research say it actually does in people?

Human trials cluster in four areas: skin, eyes, exercise recovery, and blood fats.

Does Astaxanthin Help Skin?

Skin is where the trials have looked hardest at something you can see. A systematic review found eleven clinical studies at doses around 3 to 6 mg a day, most of them reporting better skin texture, moisture or wrinkles, with no serious side effects (1). Those trials were small, ran mostly in Japanese women, and many were funded by companies with a commercial interest.

A meta-analysis then pooled nine of the randomised ones, a stricter test, and found that skin held more moisture and was more elastic than with placebo. Wrinkles improved too little to be sure the effect was real (2). Wrinkle reduction is a common selling point for astaxanthin, and it is the one claim that has not held up so far.

Does Astaxanthin Help Eye Strain?

A trial in people who work at a computer all day gave 6 mg of astaxanthin with 10 mg of lutein and 2 mg of zeaxanthin, two related pigments that build up in the eye itself, for eight weeks. Eye-hand coordination after a stint at the screen held up better than placebo, and macular pigment rose, meaning more protective pigment in the part of the retina that handles detailed central vision. Eye-tracking did not change (3). Three ingredients means nothing can be pinned on astaxanthin alone, and of the three, lutein and zeaxanthin have the longer research record (4).

The cleanest trial of astaxanthin by itself ran 4 mg a day for twelve weeks in 64 children who used screens for four hours or more daily. Symptom scores improved by about 20% against placebo, though visual acuity and focusing did not shift (5). It is a children's trial, though, so whether the same holds for adults at a higher dose is still an open question. It was also industry-sponsored, with several authors employed by the astaxanthin manufacturer.

Does Astaxanthin Help Exercise Recovery?

A 2026 meta-analysis pooled 24 randomised trials and split the question in two, which turns out to matter (6).

On recovery, creatine kinase, a blood marker of muscle damage, improved, meaning it came down. That was the most consistent finding in the analysis.

On performance, no clear benefit: nothing on VO2max, the standard measure of aerobic fitness, nor on time trials or maximum power. An earlier and smaller analysis did find a performance gain when astaxanthin was paired with regular training, with bigger effects at 20 mg a day and above (7), well over the 8 mg EU limit.

So the finding is less muscle damage showing up in the blood. Whether that lower marker reliably means less soreness, or a better session the next day, is much less clear.

Cholesterol and Triglycerides

A 2025 meta-analysis of eight randomised trials found higher HDL and lower triglycerides, and no change in LDL or total cholesterol (8). HDL and LDL are the particles that carry cholesterol around the body; triglycerides are fats circulating in the blood.

The catch is the dose. Those trials used 6 to 20 mg a day. EU supplements stop at 8 mg.

Emerging Research: Inflammation, Cognition and Bone

Inflammation has reached human trials, with results that depend on the marker and the population. A 2022 meta-analysis found lower IL-6, an inflammation marker, in people with type 2 diabetes, while two other inflammatory markers did not shift (9).

Cognition has trials too. A 2024 meta-analysis found accuracy only marginally improved, and no change in reaction time (7). Bone research is still mostly cells and animals (10).

No astaxanthin health claim is authorised in the EU. Proposed claims were assessed, found insufficiently substantiated, and sit in the register as non-authorised (11).

The Takeaway

Astaxanthin improved skin moisture and elasticity, but not wrinkles. For eye strain, some trials are positive, but the evidence is small and includes combination formulas and a children's trial. In exercise, it lowered a blood marker of muscle damage without improving performance. Blood fats improved in trials using 6 to 20 mg a day, which leaves it unclear how much an 8 mg supplement delivers.

At Augment Life, Astaxanthin provides 8 mg per capsule from Haematococcus pluvialis.

Read More

• What Is Astaxanthin?
• How to Take Astaxanthin: Best Time, Forms and Other Considerations
• Why Is Coenzyme Q10 Taken as a Supplement?

Literature Sources

1. Ng QX, De Deyn MLZQ, Loke W, Foo NX, Chan HW, Yeo WS. Effects of Astaxanthin Supplementation on Skin Health: A Systematic Review of Clinical Studies. Journal of Dietary Supplements. 2021;18(2):169-182. https://doi.org/10.1080/19390211.2020.1739187
2. Zhou X, Cao Q, Orfila C, Zhao J, Zhang L. Systematic Review and Meta-Analysis on the Effects of Astaxanthin on Human Skin Ageing. Nutrients. 2021;13(9):2917. https://doi.org/10.3390/nu13092917
3. Yoshida K, Sakai O, Honda T, Kikuya T, Takeda R, Sawabe A, et al. Effects of Astaxanthin, Lutein, and Zeaxanthin on Eye-Hand Coordination and Smooth-Pursuit Eye Movement after Visual Display Terminal Operation in Healthy Subjects. Nutrients. 2023;15(6):1459. https://doi.org/10.3390/nu15061459
4. Mrowicka M, Mrowicki J, Kucharska E, Majsterek I. Lutein and Zeaxanthin and Their Roles in Age-Related Macular Degeneration. Nutrients. 2022;14(4):827. https://doi.org/10.3390/nu14040827
5. Hecht KA, Marwah M, Wood V, Nishida Y, Bach AE, Gerson J, et al. Astaxanthin (AstaReal) Improved Acute and Chronic Digital Eye Strain in Children: A Randomized Double-Blind Placebo-Controlled Trial. Advances in Therapy. 2025;42:1811-1833. https://doi.org/10.1007/s12325-025-03125-7
6. Liu S, Yao W, Wei Y, Azhati S, Wu Y, Zhong W, et al. The Effects of Astaxanthin Supplementation on Exercise Recovery Biomarkers and Exercise Performance: A Systematic Review and Meta-Analysis. Nutrients. 2026;18(10):1570. https://doi.org/10.3390/nu18101570
7. Liu C, Dong X, Jia J, Ha M. Effects of Astaxanthin Supplementation on Fatigue, Motor Function and Cognition: A Meta-Analysis of Randomized Controlled Trials. Biological Research for Nursing. 2024;26(3):469-480. https://doi.org/10.1177/10998004241227561
8. Laurindo LF, Rodrigues VD, Carneiro DP, Marangão Filho LS, Pereira ESBM, Tofano RJ, et al. Assessing the Effects of Moderate to High Dosage of Astaxanthin Supplementation on Lipid Profile Parameters. Pharmaceuticals. 2025;18(8):1097. https://doi.org/10.3390/ph18081097
9. Ma B, Lu J, Kang T, Zhu M, Xiong K, Wang J. Astaxanthin supplementation mildly reduced oxidative stress and inflammation biomarkers: a systematic review and meta-analysis of randomized controlled trials. Nutrition Research. 2022;99:40-50. https://doi.org/10.1016/j.nutres.2021.09.005
10. Davan I, Fakurazi S, Alias E, Ibrahim NI, Hwei NM, Hassan H. Astaxanthin as a Potent Antioxidant for Promoting Bone Health: An Up-to-Date Review. Antioxidants. 2023;12(7):1480. https://doi.org/10.3390/antiox12071480
11. EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA). Scientific Opinion on the substantiation of health claims related to astaxanthin and maintenance of joints, tendons and connective tissue, protection of DNA, proteins and lipids from oxidative damage, maintenance of visual acuity, maintenance of blood cholesterol concentrations and maintenance of low plasma concentrations of C-reactive protein. EFSA Journal. 2009;7(9):1253. https://doi.org/10.2903/j.efsa.2009.1253