When to take Astaxanthin
Also known as ASX, Haematococcus pluvialis algae extract
Take astaxanthin with a meal, at any time of day. Skin studies gave it with or after a meal because that gave about 2.4 times better absorption than taking it before eating.
Last reviewed October 13, 2026
Timing
| Best time | Any time of day |
|---|---|
| Food | With a meal |
| Fat-soluble | Yes — take it with a meal that has some fat |
- Any time; consistency matters more than timing.
- Astaxanthin dissolves in fat, and how well you absorb it depends on fat in your diet.
- Skin trials gave it with or after a meal. One study found about 2.4 times better absorption than before a meal.
Check with your doctor first if…
- Medicines: how astaxanthin mixes with common medicines has been poorly studied. Ask your doctor or pharmacist if you take any medicine.
- Long-term use: long-term safety is largely unstudied.
- Reviews describe it as well tolerated, and eye studies reviewed in 2020 reported no side effects.
Amounts studied
Skin trials: mostly 4 to 12 mg/day (two used 2 mg/day) for 4 to 16 weeks. Other trials: 6 to 20 mg/day, most often 12 mg/day. One eye-strain trial: 4 or 12 mg once a day for 28 days.
Follow the serving size on your product’s label.
What the research says
| Area | Evidence | Summary |
|---|---|---|
| Skin | Moderate | A 2021 review of 8 small trials found astaxanthin improved skin moisture and elasticity compared with placebo, but not wrinkle depth. Most trials were small and done in healthy Japanese women.[1] |
| Eye comfort | Limited | A few small trials reported less eye strain in screen workers and quicker eye focusing in adults over 40 who took 4 or 12 mg a day for 28 days.[3] |
Questions
Should I take astaxanthin with food?
Yes. It dissolves in fat, and skin studies gave it with or after a meal. One study found about 2.4 times better absorption than taking it before eating.
How long does astaxanthin take to work for skin?
Skin trials lasted 4 to 16 weeks. Over that time they found better moisture and elasticity, but no clear change in wrinkle depth.
Does astaxanthin help with eye strain from screens?
A few small trials suggest it may help with eye strain and focusing, but the research is limited. Most of the eye research so far is in animals.
Can I take astaxanthin every day?
Trials gave it daily for up to about 24 weeks, and reviews describe it as well tolerated. Long-term safety and drug interactions are not well studied, so ask your doctor if you take medicines.
Plan your whole routine
Add Astaxanthin and everything else you take to the planner to see your morning, midday and evening, and what to keep apart.
Open the plannerFrom AT2A
Sources
- Systematic Review and Meta-Analysis on the Effects of Astaxanthin on Human Skin Ageing (Nutrients, 2021), PMC (accessed October 13, 2026)
- The Role of Astaxanthin as an Antioxidant and Anti-Inflammatory Agent in Human Health: A Systematic Review (Int J Mol Sci, 2026), PMC (accessed October 13, 2026)
- Clinical Applications of Astaxanthin in the Treatment of Ocular Diseases: Emerging Insights (Mar Drugs, 2020), PMC (accessed October 13, 2026)
These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease. It is general information, not medical advice: talk with your doctor or pharmacist before starting a supplement, especially if you are pregnant, breastfeeding, take medicine or have a health condition.