Astaxanthin is the red carotenoid that colours salmon and shrimp, and it has become one of the signature ingredients of Japanese beauty and eye-care supplements. Brands abroad ask for it because Japanese research and Japanese products made it familiar.
This guide is for brand owners planning an astaxanthin product made in Japan. It sets out what the human studies show, where the evidence is weaker than the marketing around it, how the ingredient is usually formulated, and what to decide before asking for a quotation.
Health supplements are foods, not medicines, and are not a substitute for medical treatment. Nothing here is a claim that any product prevents, treats or cures a disease.
💬 Planning an astaxanthin product made in Japan? We check the full formula against Japanese food law first. See Japan-made supplement OEM.
What the research shows for skin
A 2021 meta-analysis reported improvements in skin moisture and elasticity with oral astaxanthin but no significant change in wrinkle depth, and a broader 2022 analysis judged the evidence for skin moisture insufficient.
| Study | What was analysed | Reported result |
|---|---|---|
| Systematic review and meta-analysis, Nutrients 2021, 13(9):2917 (PMID 34578794) | 11 studies, including 9 randomised controlled trials of oral astaxanthin | Moisture content and elasticity improved compared with placebo; no significant decrease in wrinkle depth |
| Meta-analysis of dietary supplements for skin moisturising in healthy adults, Frontiers in Nutrition 2022 (PMID 35719159) | 66 randomised controlled trials of several supplements, analysed by ingredient | For astaxanthin, the improvement in stratum corneum water content was not significant; the evidence was judged insufficient |
Two careful reviews reached different conclusions about moisture, and neither found an effect on wrinkles. The accurate description is that astaxanthin has been studied for skin moisture and elasticity with mixed results — not that it removes wrinkles or reverses ageing.
What the research shows for eyes after screen work
Randomised trials have looked at eye comfort and focusing after screen use, with some positive results, but several of them tested astaxanthin combined with other ingredients.
| Study | Design | Reported result |
|---|---|---|
| Randomised, double-blind, placebo-controlled trial in children, Advances in Therapy 2025 (PMID 40014233) | 64 children aged 10–14 with at least four hours of daily screen time and mild to moderate screen-related eye-strain symptoms, 84 days; funded by an ingredient manufacturer | Screen-related eye-strain questionnaire scores improved after 84 days |
| Randomised, double-blind trial in healthy Japanese adults, Journal of Clinical Biochemistry and Nutrition 2021 (PMID 34376917) | 44 adults with eye fatigue after screen work; a test food combining anthocyanin, astaxanthin and lutein, 6 weeks; authors included employees of two food companies | Improvements in pupillary response measures before and after screen work, and in self-rated trouble focusing the eyes, compared with placebo |
| Randomised, double-blind trial in healthy adults who regularly use screens, Nutrients 2023 (PMID 36986186) | 6 mg astaxanthin combined with 10 mg lutein and 2 mg zeaxanthin daily, 8 weeks; funded by a pharmaceutical manufacturer | Eye–hand coordination after screen work improved at 8 weeks; no clear improvement in smooth-pursuit eye movement |
When a trial tests a combination, the result belongs to the combination, not to astaxanthin alone. If you plan to cite a study on your pack or website, your formula should match what that study tested.
Checked against the published abstracts on 25 September 2026.
💬 Want an evidence summary for your regulatory adviser that matches your exact formula? We prepare it with the manufacturing documents. Tell us your market.
What Japanese products say
In Japan, astaxanthin appears in Foods with Function Claims notified for functions such as supporting the eye’s focusing and helping to keep skin moist.
Foods with Function Claims are products notified to Japan’s Consumer Affairs Agency with evidence for a stated function. The notified wording for astaxanthin products describes functions of healthy eyes and skin, not treatments. That tone is a useful model, but it is your own market’s rules that govern your label abroad.
How astaxanthin is formulated
Astaxanthin is oil-soluble and sensitive to light and oxygen, so it is most often made as a soft capsule.
| Dosage form | Why | What to weigh up |
|---|---|---|
| Soft capsule | Holds the oil-based extract and protects it from light and air | The standard choice; capsule shell (gelatin or plant-based) affects dietary suitability |
| Hard capsule or tablet | Possible with powdered, stabilised forms | Stability and colour need testing |
| Drink or jelly | Combined beauty products | Protecting a light-sensitive ingredient in a liquid needs formulation work |
Decisions that shape the specification:
- Source. Astaxanthin used in supplements is commonly extracted from the microalga Haematococcus pluvialis. Ask the supplier for the source, the extraction method and the astaxanthin content of the extract, not only the brand name.
- Daily amount. Trials use milligram-level daily amounts. If you want to cite a study, match its daily amount; if your market sets a maximum daily intake for astaxanthin, that limit governs your label.
- Companion ingredients. Lutein, zeaxanthin, anthocyanin-rich extracts, collagen and vitamin E are common partners. Each one needs its own check against Japanese food law and against your market’s rules.
- Packaging. Light protection matters. Blister packs, aluminium pouches or opaque bottles are the usual choices.
The check that comes first
Every ingredient must be permitted in foods in Japan, or a Japanese factory cannot make the product.
Astaxanthin itself is used in foods in Japan. The risk sits in companion ingredients: some herbal extracts sold freely as supplements elsewhere are treated as medicines in Japan. A formula containing one of them cannot be made as a food, and cannot obtain a Japanese Certificate of Free Sale. See the Japan-made supplement OEM page for how we run that check, and the collagen peptide guide if you plan a combined beauty product.
Before you ask for a quotation
A factory can quote accurately once the extract, the daily amount, the form and the packaging are fixed.
- Astaxanthin source and extract specification
- Daily amount and servings per pack
- Dosage form and capsule shell
- Companion ingredients and their amounts
- Packaging and light protection
- Countries you will sell in, and first order and annual volume
💬 Ready to design a Japan-made astaxanthin product? Send us the concept — extract, daily amount, form and the countries you will sell in.
Frequently asked questions
1. Does astaxanthin improve skin?
A 2021 meta-analysis reported improvements in skin moisture and elasticity but no significant effect on wrinkle depth, while a 2022 analysis judged the evidence for skin moisture insufficient. Describe it as studied for skin moisture and elasticity, with mixed results.
2. Is there research on astaxanthin and eye comfort?
Yes. Randomised trials have assessed eye comfort and focusing after screen work, including a 2025 trial in children with heavy screen use that was funded by an ingredient manufacturer. Several trials tested astaxanthin combined with other ingredients, so match your formula to the study you cite.
3. Why are astaxanthin products usually soft capsules?
Astaxanthin is oil-soluble and sensitive to light and oxygen. A soft capsule holds the oil-based extract and protects it.
4. Where does supplement astaxanthin come from?
It is commonly extracted from the microalga Haematococcus pluvialis. Ask the supplier for the extract specification and astaxanthin content.
5. Can I combine astaxanthin with collagen in one product?
Yes, it is a common beauty combination. Each ingredient must be permitted in foods in Japan and in your market, and the dosage form must suit both.
Sources: “Systematic Review and Meta-Analysis on the Effects of Astaxanthin on Human Skin Ageing”, Nutrients 2021, 13(9):2917 (PMID 34578794); “Effectiveness of Dietary Supplement for Skin Moisturizing in Healthy Adults: A Systematic Review and Meta-Analysis of Randomized Controlled Trials”, Frontiers in Nutrition 2022 (PMID 35719159; PMC9201759); randomised, double-blind, placebo-controlled trial of astaxanthin in school-aged children with screen use, Advances in Therapy 2025 (PMID 40014233); “Effects of anthocyanin, astaxanthin, and lutein on eye functions: a randomized, double-blind, placebo-controlled study”, Journal of Clinical Biochemistry and Nutrition 2021 (PMID 34376917); “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 (PMID 36986186; PMC10054128); Consumer Affairs Agency notifications for Foods with Function Claims. Checked on 25 September 2026.