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ingestible · for eye health & vision support

Astaxanthin

Reviewed by the Nimbera editorial team · Last updated May 2026

Sekikawa 2023 Journal of Clinical Biochemistry and Nutrition (PMID 36777084) - randomised double-blind placebo-controlled parallel trial in 60 healthy adults; 9 mg/day astaxanthin for 6 weeks significantly protected corrected visual acuity in the dominant eye after visual display terminal work in participants aged 40+ (p<0.05).$15-$35 per month for 6-12 mg daily dosing

How to use

Take 4-12 mg astaxanthin daily with a fat-containing meal (it is fat-soluble). The studied dose for digital eye strain is 6-9 mg/day. Take consistently for at least 4-6 weeks before assessing effect. Natural (fermented) astaxanthin from Haematococcus pluvialis algae is preferred over synthetic forms.

How it works

Astaxanthin is a ketocarotenoid with exceptional antioxidant potency. It crosses the blood-retinal barrier and accumulates in retinal tissue, where it scavenges reactive oxygen species generated by photoreceptor phototransduction and high-energy blue light from screens. It also supports ciliary muscle function and accommodation, reducing the eye strain associated with prolonged near-focus work.

Where to buy

AstaReal-branded astaxanthin (from Fuji Chemical Industries) is the most clinically researched form and is found in Jarrow Formulas AstaXanthin, NOW Foods Astaxanthin, and Sports Research Astaxanthin with Organic Coconut Oil. BioAstin Hawaiian Astaxanthin (Cyanotech) is another well-regarded brand. Available at iHerb, Amazon, and Whole Foods.

Typical cost: $15-$35 per month for 6-12 mg daily dosing

Safety notes

Astaxanthin is generally well tolerated across clinical trials. It may cause skin to take on a slightly orange-pink tint at very high doses (uncommon at standard 6-12 mg doses). Theoretical additive effect with anticoagulants and antihypertensives - monitor if combined. Choose only algae-derived sources, not synthetic (petrochemical-derived) forms. Safety data in pregnancy is insufficient; avoid during pregnancy and breastfeeding.

Drug & supplement interactions

  • Always tell your doctor or pharmacist about any supplements you take.
  • Interactions can occur with prescription medications, blood thinners, and immunosuppressants.
  • Herbal remedies can affect how the body absorbs or metabolises drugs.
  • Check drugs.com interactions checker before starting.

Clinical source

Sekikawa 2023 - J Clin Biochem Nutr (PMID 36777084)

This information is compiled from primary clinical literature and is for informational purposes only. It is not a substitute for professional medical advice. Read our full disclaimer.