Astaxanthin Supplements in Ireland: Benefits, Dosage and Safety
Astaxanthin is one of the most searched supplement antioxidants, and one of the most over-claimed. This guide sticks to what human trials actually show, what they do not, how much to take, and the two options we stock in Ireland.
Astaxanthin is a red carotenoid antioxidant from the microalga Haematococcus pluvialis, sold in Ireland as a food supplement in 4mg to 12mg softgels. In Ireland it is regulated by the FSAI as a food supplement, not a medicine, and no authorised EU health claim exists for astaxanthin itself. The strongest human evidence is for skin: a 2021 meta-analysis of nine randomised trials (Zhou et al., Nutrients) reported improved skin moisture and elasticity, though the same analysis found no significant effect on wrinkle depth. EFSA concluded that up to 8mg per day from supplements is safe for adults. This guide covers the research, dosage including whether 12mg is too much, safety, and vegan options, plus the two products we dispatch from Dublin, normally within 24 hours: NOW Foods Astaxanthin 4mg (vegan, €22.95) and Healthy Origins Astaxanthin 12mg (€58.50).
Astaxanthin definition: a red-orange xanthophyll carotenoid produced by the freshwater microalga Haematococcus pluvialis, the pigment that gives salmon, trout and shrimp their pink colour, taken as a fat-soluble antioxidant food supplement.
It is a food supplement, usually a softgel, providing 4mg to 12mg of natural astaxanthin from Haematococcus pluvialis microalgae. It is regulated by the FSAI as a food supplement, not a medicine, and it is not a stimulant. The most consistent human evidence is for skin moisture and elasticity[1], while effects on wrinkles, heart, brain and hormones are not established in people. In Ireland we stock a vegan 4mg option and a 12mg option, both dispatched from Dublin, normally within 24 hours.
- What it is: a red xanthophyll carotenoid antioxidant
- Natural source: the microalga Haematococcus pluvialis
- Dietary sources: salmon, trout, shrimp, krill, crab
- Supplement source: algae extract (AstaPure, Zanthin), not synthetic
- EFSA safe supplement intake: up to 8mg/day assessed safe for adults (EFSA, 2020)
- Typical human trial dose: 4mg to 12mg per day
- Is it a stimulant or medicine? No. It is a fat-soluble food supplement.
- Vegan/vegetarian suitable? The 4mg softgel yes; the 12mg gelatin softgel no
- Irish regulatory status: food supplement under FSAI guidelines, not a medicine
- Irish VAT on supplements: 13.5%
- It is not a medicine and carries no authorised EU health claim
- It is not a proven treatment for any skin, eye, heart or brain condition
- It is not a hormone product, and there is no reliable evidence it changes estrogen or testosterone
- It is not a stimulant, and it does not need to be cycled
- A higher milligram figure does not mean a more effective product
- Synthetic astaxanthin is not the same as the algae-derived form sold here
What is well-supported: a 2021 meta-analysis of nine RCTs (Zhou et al., Nutrients 2021) found oral astaxanthin improved skin moisture (SMD 0.53, p=0.03) and elasticity (SMD 0.77, p=0.009) versus placebo.[1]
What is not proven: the same meta-analysis found no significant effect on wrinkle depth, and human evidence for heart, brain, hormone and "anti-ageing" claims is limited or absent.
Most relevant human dose range: 4mg to 6mg per day in most skin trials; up to 12mg in some studies.
Key safety note: EFSA assessed up to 8mg/day from supplements as safe for adults; the products here are for adults only.[4]
| Feature | Specification | Evidence Level |
|---|---|---|
| Skin moisture and elasticity | Improved vs placebo in 9-RCT meta-analysis | Meta-analysis |
| Wrinkle depth | No significant effect in same meta-analysis | Not shown |
| Eye fatigue | Studied, often in combination formulas | Mixed |
| Heart, brain, hormones | Limited or no human evidence | Not established |
| Irish regulatory status | Food supplement (FSAI), not a medicine | Confirmed |
The research in this article relates to astaxanthin as a studied compound. It should not be read as a claim that any product below produces these effects. Probiotic.ie sells the products discussed in this guide, and the links lead to our own store. These are food supplements, not medicines. No authorised EU health claim exists for astaxanthin. The only authorised claim relevant here is that vitamin E contributes to the protection of cells from oxidative stress, relating to the vitamin E in the 12mg product.
Healthy Origins Astaxanthin 12mg
Natural AstaPure astaxanthin from microalgae, with vitamin E and lutein. One softgel a day, 60-day supply.
Food supplement, not a medicine. No health claim is made for astaxanthin. Price includes Irish VAT at 13.5%. Dispatched from Dublin, normally within 24 hours. Free delivery over €75.
What astaxanthin is and what it does
Astaxanthin is a xanthophyll carotenoid, part of the same broad pigment family as beta-carotene and lutein. It is produced by the microalga Haematococcus pluvialis and concentrates up the food chain, which is why salmon, trout, shrimp and krill are pink.
As a supplement it is fat-soluble, so it is taken with food. It is studied as an antioxidant, meaning it can interact with reactive molecules in laboratory conditions. Whether that translates into a specific health outcome in people is a separate question, and one the human trials only partly answer.
The honest summary: the human evidence clusters around skin, with some work on eye fatigue. Broader claims about ageing, heart health, hormones and cognition are mostly preclinical or based on small studies. Astaxanthin is a well-studied antioxidant compound, but a well-studied antioxidant, like resveratrol, is not the same as a proven treatment.
Carotenoid antioxidant
Interacts with reactive molecules in lab conditions. It spans cell membranes, unlike some other antioxidants.
Evidence: mechanism, mostly preclinicalSkin
Was associated with improved moisture and elasticity in human trials. Wrinkle depth did not change significantly.
Evidence: RCTs and one meta-analysisEye fatigue
Studied for focusing and screen-related eye strain, frequently as part of combination formulas.
Evidence: mixed, often combined ingredientsSource and absorption
Derived from Haematococcus pluvialis microalgae. Fat-soluble, so taken with a meal.
Evidence: established chemistryAstaxanthin and skin: the strongest evidence
Skin is where astaxanthin has the most human data. In 2012, Tominaga and colleagues ran two small studies using 6mg per day, reporting improvements in skin parameters over 8 weeks, with a separate small controlled study in men.[2]
In 2018, Ito and colleagues ran a randomised, double-blind, placebo-controlled trial in 23 people using 4mg per day for around 10 weeks, focused on protection against UV-induced skin drying.[3]
The most useful single reference is a 2021 systematic review and meta-analysis by Zhou and colleagues, published in Nutrients, which pooled nine randomised controlled trials.[1] It found oral astaxanthin significantly improved skin moisture (SMD 0.53, p=0.03) and elasticity (SMD 0.77, p=0.009) compared with placebo.
The same analysis is why this guide stays balanced. It found no significant effect on wrinkle depth (SMD -0.26, p=0.11). So the fair reading is moisture and elasticity yes, wrinkles no, on current evidence.
Zhou et al., Nutrients 2021. Nine RCTs pooled. Oral astaxanthin improved skin moisture (SMD 0.53, p=0.03) and elasticity (SMD 0.77, p=0.009) vs placebo. PMC8472736.
Wrinkle depth, same meta-analysis. No significant effect (SMD -0.26, p=0.11). A clear example of astaxanthin not doing something it is often marketed to do. PMC8472736.
Trial quality. Many astaxanthin trials are small, short (6 to 16 weeks), and industry-funded. Findings are often dose-specific and tied to one branded extract rather than class-wide, so results do not automatically transfer between products. Effect sizes are modest, and results in healthy people do not prove a health outcome. No authorised EU health claim exists for astaxanthin.
Astaxanthin and eye fatigue
Astaxanthin is often marketed for screen-related eye strain. The human evidence exists but is weaker than the skin data and harder to attribute to astaxanthin alone.
For example, Kizawa and colleagues (2021) ran a randomised, double-blind, placebo-controlled study in 44 adults with eye fatigue from screen work.[5] The active group improved on pupillary response and on focusing-difficulty scores over 6 weeks. The catch: the test product combined anthocyanin, astaxanthin and lutein, so you cannot separate astaxanthin's specific contribution, and the study was industry-linked.
The takeaway for a buyer: eye-fatigue research is promising but not settled, and much of it uses combination formulas. If eye comfort is your only goal, the evidence does not yet single out astaxanthin as the deciding ingredient.
Dosage: how much, and is 12mg too much?
Most human trials used 4mg to 6mg per day, with some up to 12mg. There is no good evidence that higher doses give proportionally better outcomes, so more is not automatically better.
On the "is 12mg too much" question, lead with what EFSA actually concluded. In 2020 EFSA specifically assessed up to 8mg per day from food supplements as safe for adults.[4] A 12mg softgel is above that directly-assessed supplemental level.
There is also a separate, weight-based acceptable daily intake of 0.2mg per kg, about 14mg for a 70kg adult. That figure is a population-level toxicological limit, not a recommended supplement dose, so it should not be read as a green light for 12mg. Because it is weight-based, a lighter adult reaches it sooner. The sensible position: 12mg is best discussed with a pharmacist or doctor, particularly at a lower body weight, on medication, or if you use other astaxanthin-containing products. Both products we stock are for adults only, one softgel a day.
If you want to stay at or below the level EFSA assessed directly for supplements, the 4mg option does that. The 12mg option provides a higher single-softgel dose that is above EFSA's directly-assessed 8mg supplemental level, so it is best discussed with a pharmacist or GP, particularly at a lower body weight or if you take medication.
Safety, side effects and hormones
Astaxanthin is generally well tolerated in trials. In its safety review, EFSA reported that astaxanthin is neither mutagenic nor carcinogenic.[4] Reported effects tend to be mild.
On the "liver" and "dangers" searches: there is no established evidence of liver harm from astaxanthin at normal supplement doses. As with any supplement, if you have a liver condition or take medication, check with your doctor first.
On hormones, which is a common search: there is no reliable human evidence that astaxanthin raises or lowers estrogen. The hormone interest traces mainly to small studies of a combined saw palmetto and astaxanthin product, not astaxanthin on its own. It is not a hormone product and should not be taken as one.
For adults 18 and over. If you are pregnant, breastfeeding, taking medication, or have a medical condition, speak to your doctor or pharmacist before use. Both products contain soy. Do not exceed the recommended daily dose. This is general information, not medical advice.
Vegan astaxanthin options
Natural astaxanthin comes from algae, so the active ingredient is plant-based. The catch is usually the capsule shell.
The NOW Foods Astaxanthin 4mg softgel uses a plant-based shell made from modified corn starch, glycerin and carrageenan, with no gelatin, so it is suitable for vegans and vegetarians. The Healthy Origins 12mg softgel uses kosher gelatin, so it is not suitable for vegans or vegetarians. Both use natural astaxanthin from Haematococcus pluvialis and both contain soy.
| Comparison | NOW Foods 4mg | Healthy Origins 12mg |
|---|---|---|
| Astaxanthin per softgel | 4mg | 12mg |
| Formula | Single ingredient | With vitamin E and lutein |
| Vegan / vegetarian | Yes | No (gelatin) |
| Softgels per bottle | 60 | 60 |
| Price (inc. VAT) | €22.95 | €58.50 |
| Best suited to | Lower daily dose, plant-based buyers | Higher single-dose, once-daily buyers |
The research above relates to astaxanthin as a studied compound and is not a claim that either product produces these effects. Both are food supplements, not medicines. No authorised EU health claim is made for astaxanthin on this page.
Comparing the 4mg option
NOW Foods Astaxanthin 4mg. Vegan and vegetarian single-ingredient softgel, made in a GMP-certified facility.
Food supplement, not a medicine. No health claim is made for astaxanthin. Price includes Irish VAT at 13.5%. Dispatched from Dublin, normally within 24 hours. Free delivery over €75.
Astaxanthin in Ireland: rules, VAT and delivery
In the EU, astaxanthin-rich oleoresin from Haematococcus pluvialis is authorised for specified food uses, including food supplements, subject to conditions of use and labelling requirements.[6] Food supplements sold in Ireland must comply with EU and Irish food law, with the Food Safety Authority of Ireland (FSAI) responsible for food-safety oversight. Astaxanthin is sold over the counter as a food supplement, not a medicine, and no authorised EU health claim exists for it.
Irish VAT on food supplements is 13.5%[7], which is included in the shelf price. Both products here are dispatched from our Dublin base, normally within 24 hours, with free delivery over €75. Because they dispatch from within Ireland, there are no customs charges or import fees, which matters more since the EU customs rule change in July 2026.
Orders are picked and packed in Dublin and dispatched for nationwide delivery, normally within 24 hours. No customs charges apply to Irish orders, and cold-chain is not required for astaxanthin softgels, though we store all stock correctly. Free delivery over €75.
- Astaxanthin is a red carotenoid antioxidant from the microalga Haematococcus pluvialis.
- Astaxanthin is not a medicine and carries no authorised EU health claim.
- EFSA assessed up to 8mg/day from supplements as safe for adults (EFSA, 2020), with a 2019 ADI of 0.2mg/kg/day, about 14mg for a 70kg adult.
- Most human trials use 4mg to 12mg/day. Human evidence is strongest for skin and weakest for heart, brain and hormones.
- The strongest human signal is improved skin moisture and elasticity in a 9-RCT meta-analysis (Zhou et al., Nutrients, 2021).
- The same meta-analysis found no significant effect on wrinkle depth.
- A higher milligram figure does not mean a more effective product.
- There is no reliable human evidence that astaxanthin changes estrogen or testosterone.
- In Ireland, astaxanthin supplements are regulated by the FSAI as food supplements, not medicines. 13.5% VAT applies.
- Probiotic.ie stocks NOW Foods Astaxanthin 4mg (vegan, €22.95) and Healthy Origins Astaxanthin 12mg (€58.50), dispatched from Dublin, normally within 24 hours.
Product details on this page, including doses (4mg and 12mg per softgel), capsule counts (60), source (Haematococcus pluvialis), capsule type (vegan softgel for the 4mg, kosher gelatin for the 12mg), and prices (€22.95 and €58.50 inc. VAT at 13.5%), were verified by Probiotic.ie from the current NOW Foods and Healthy Origins listings. Product details should always be checked against the current label before use, as formulations and pricing may change.
Frequently asked questions
What does astaxanthin do?
Astaxanthin is a red carotenoid antioxidant produced by the microalga Haematococcus pluvialis. It is fat-soluble and has been studied mainly for skin and eye outcomes. The most consistent human signal is for skin: a 2021 meta-analysis of nine randomised trials (Zhou et al., Nutrients) reported improved skin moisture and elasticity versus placebo. No authorised EU health claim exists for astaxanthin, so these remain research findings rather than approved claims.
Is astaxanthin good for skin?
Skin is where the human evidence for astaxanthin is strongest. A 2021 meta-analysis of nine randomised controlled trials (Zhou et al., Nutrients 2021) found oral astaxanthin significantly improved skin moisture (SMD 0.53) and elasticity (SMD 0.77) compared with placebo, though it found no significant effect on wrinkle depth. Trials typically used 4mg to 6mg per day over 6 to 16 weeks. These are research outcomes, not an authorised EU health claim.
What is the best astaxanthin dosage for skin?
Human skin trials most often used 4mg to 6mg of astaxanthin per day. Tominaga et al. (2012) used 6mg daily and Ito et al. (2018) used 4mg daily. There is no evidence that higher doses give proportionally better skin outcomes, and no authorised EU health claim exists for astaxanthin and skin. Follow the dose on the product label and take it with a meal.
Is 12mg of astaxanthin too much?
EFSA has specifically concluded that 8mg per day from food supplements is safe for adults, so a 12mg softgel is above that directly-assessed supplemental level. A separate weight-based acceptable daily intake of 0.2mg per kg (about 14mg for a 70kg adult) is a population-level toxicological limit, not a recommended supplement dose, so it should not be read as a green light for 12mg. Anyone considering 12mg a day should check with a pharmacist or doctor first, especially at a lower body weight, on medication, or using other astaxanthin-containing products. Both products we stock are for adults only, one softgel a day.
Does astaxanthin increase estrogen?
There is no reliable human evidence that astaxanthin raises or lowers estrogen. The hormone questions around astaxanthin trace mainly to small studies of a combined saw palmetto and astaxanthin product, not astaxanthin on its own. No authorised EU health claim exists for astaxanthin and hormones, and it should not be taken for that purpose.
What are the side effects of astaxanthin?
Astaxanthin is generally well tolerated in trials, and EFSA reported it is neither mutagenic nor carcinogenic. Reported effects are usually mild and can include a harmless reddish tint to the skin at higher intakes. There is no established evidence of liver harm at supplement doses, but if you are pregnant, breastfeeding, or taking medication, speak to your doctor first. This is general information, not medical advice.
Is there a vegan astaxanthin supplement?
Yes. The NOW Foods Astaxanthin 4mg softgel uses a plant-based shell of modified corn starch, glycerin and carrageenan with no gelatin, so it is suitable for vegans and vegetarians. The Healthy Origins 12mg softgel uses kosher gelatin and is not suitable for vegans or vegetarians. Both use natural astaxanthin from Haematococcus pluvialis.
When should I take astaxanthin?
Astaxanthin is fat-soluble, so it is best taken with a meal that contains some fat to support absorption. Most labels direct one softgel daily. There is no strong evidence that a specific time of day matters, so consistency with food is the practical rule.
Is astaxanthin legal in Ireland?
Yes. Astaxanthin-rich oleoresin from Haematococcus pluvialis is authorised for use in food supplements in the EU, subject to conditions of use and labelling requirements. Food supplements sold in Ireland must comply with EU and Irish food law, with the Food Safety Authority of Ireland (FSAI) responsible for food-safety oversight. It is sold over the counter as a food supplement and is not a medicine.
Where can I buy astaxanthin in Ireland?
Probiotic.ie stocks two astaxanthin options: NOW Foods Astaxanthin 4mg (vegan, €22.95) and Healthy Origins Astaxanthin 12mg (€58.50). Both are dispatched from our Dublin base, normally within 24 hours, with free delivery over €75, and because they dispatch from within Ireland there are no customs charges. Irish VAT on food supplements is 13.5%.
This guide was prepared by Probiotic.ie using the following process:
- Reviewed the primary human sources: the Zhou et al. 2021 skin meta-analysis, the Tominaga 2012 and Ito 2018 skin trials, the Kizawa 2021 eye study, and the EFSA 2020 safety opinion.
- Separated research findings from approved claims, and stated clearly that astaxanthin carries no authorised EU health claim.
- Verified each citation against its source record, and used PMC accession numbers where a PMID was not directly confirmed.
- Checked FSAI food-supplement rules and EU claims rules for Irish compliance.
- Verified both product details (dose, capsule type, price) against the live Probiotic.ie listings.
- Made no disease-treatment claim for astaxanthin.
This guide was written from a retailer and regulatory-compliance perspective and has not been medically reviewed.
- 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. PMC8472736. DOI: 10.3390/nu13092917. ncbi.nlm.nih.gov/pmc/articles/PMC8472736
- Tominaga K, Hongo N, Karato M, Yamashita E. Cosmetic benefits of astaxanthin on human subjects. Acta Biochim Pol. 2012;59(1):43-47. PMID 22428137. pubmed.ncbi.nlm.nih.gov/22428137
- Ito N, Seki S, Ueda F. The Protective Role of Astaxanthin for UV-Induced Skin Deterioration in Healthy People: A Randomized, Double-Blind, Placebo-Controlled Trial. Nutrients. 2018;10(7):817. PMC6073124. DOI: 10.3390/nu10070817. ncbi.nlm.nih.gov/pmc/articles/PMC6073124
- EFSA NDA Panel. Safety of astaxanthin for its use as a novel food in food supplements. EFSA Journal. 2020;18(2):5993. PMID 32874213. DOI: 10.2903/j.efsa.2020.5993. pubmed.ncbi.nlm.nih.gov/32874213
- Kizawa Y, Sekikawa T, Kageyama M, Tomobe H, Kobashi R, Yamada T. Effects of anthocyanin, astaxanthin, and lutein on eye functions: a randomized, double-blind, placebo-controlled study. J Clin Biochem Nutr. 2021;69(1):77-90. PMID 34376917. DOI: 10.3164/jcbn.20-149. pubmed.ncbi.nlm.nih.gov/34376917
- Food Safety Authority of Ireland. Food Supplements: legislation and guidance. fsai.ie/legislation/food-legislation/food-supplements
- Office of the Revenue Commissioners. VAT treatment of food supplements (13.5% reduced rate). revenue.ie/en/vat/vat-on-goods/food-drinks-and-supplements/food-supplements.aspx