✓ No active regulatory warningsFDA MedWatch, EMA EudraVigilance, WHO VigiBase, WADA Prohibited List · 2026-05-29
📰Read the full Astaxanthin evidence review on GMJ News →Complete clinical article, references and updates on news.gmj.ge. This page is the structured safety summary.⚠ Fat-soluble — take with fat-containing meal (2–3× absorption improvement) [2]
⚠ Natural > synthetic (different isomer profile) [1]
⚠ Does NOT have vitamin A activity — safe even at high doses [2]
ℹ️ Not obtained from food. A carotenoid from salmon, shrimp and algae; not a nutrient with an established daily target.
🔬 Lab interpreter
ℹ️ No validated blood test. There is no established laboratory test to assess status or guide dosing for this ingredient. Clinical response and symptoms are the practical guide.
⚕ For professionals — confirm ranges against your local laboratory.
Clinical verdict
Astaxanthin is the most potent lipid-soluble antioxidant measured — 6,000× vitamin C for singlet oxygen. Uniquely spans cell membranes. Does NOT convert to vitamin A or become pro-oxidant. Best evidence for skin photoprotection and exercise recovery. Natural H. pluvialis source preferred over synthetic. Take with fat [1] [2].
1 How much do I need?
👤 Adults: Specific dosage data under clinical review
👴 Elderly: Specific dosage data under clinical review
🤰 Pregnancy: See guidance
Food sources (salmon) safe. Supplemental doses not studied in pregnancy [1].
👦 Pediatric: See guidance
No pediatric supplementation data [1].
🏃 Athletes: Standard dose
⚖️ Obesity: Standard dose
Fat-soluble compounds may require dose adjustment in obesity.
🩺 Renal: Consult specialist
Dose adjustment may be needed in renal impairment.
🌱 Vegan: Standard dose
How to take
🍽 Timing: With a fat-containing meal (critical for absorption) [2].
💊 With food: Olive oil, avocado, nuts — any fat source [2].
🚫 Avoid: No significant contraindications [2].
2 Which form?
| Form | Bioavailability | Vegan | Cost |
|---|---|---|---|
| ['Natural astaxanthin (H. pluvialis)', 'preferred', "3S,3'S isomer. Contains esterified forms. Higher bioavailability and potency than synthetic. Most clinical trials use this source [1]."] | Standard | Check label | |
| ['Synthetic astaxanthin', '', 'Racemic mixture. Used primarily in aquaculture feed. Less potent than natural form [1].'] | Standard | Check label |
3 Common questions
How is astaxanthin different from other carotenoids? ▼
Unlike beta-carotene, astaxanthin: (1) does NOT convert to vitamin A (no hypervitaminosis A risk), (2) does NOT become pro-oxidant at high doses, and (3) uniquely spans the cell membrane bilayer, protecting both the hydrophilic and hydrophobic regions [1].
Why is wild salmon pink? ▼
Wild salmon eat krill and algae that produce astaxanthin. The carotenoid accumulates in their flesh, giving the characteristic pink-red color. Farm-raised salmon is often paler unless astaxanthin is added to feed [1].
Is 4 mg enough? ▼
Most clinical trials showing benefits used 4–12 mg/day. For skin: 4–6 mg/day is common. For exercise recovery: 12 mg/day. There is no established optimal dose [2].
Natural vs synthetic — does it matter? ▼
Yes. Natural H. pluvialis astaxanthin (3S,3'S isomer) has higher antioxidant potency than synthetic (racemic mixture) and is the form used in clinical trials [1].
4 Clinical evidence
Strong
Singlet oxygen quenching: astaxanthin is the most potent biological singlet oxygen quencher tested — 6,000× vitamin C [1]. Membrane-spanning antioxidant architecture: uniquely spans the lipid bilayer [1]. Skin photoprotection in animal models [2]. HIGH
Moderate
Skin health: RCTs (6–12 mg/day) showed improved skin elasticity, reduced wrinkles, and UV protection (increased MED) [2]. Exercise recovery: reduced CK and muscle soreness post-exercise in several trials [2]. Cardiovascular: improved lipid oxidation markers and HDL levels [2]. Eye fatigue: reduced visual display terminal fatigue in Japanese trials [2]. MODERATE
Insufficient
5 Safety, toxicity & adverse events
Relative
⚠ Concurrent antihypertensives — astaxanthin may lower blood pressure additively
⚠ Concurrent immunosuppressants — immunomodulatory effects
⚠ Hormone-sensitive conditions — may lower DHT (5α-reductase inhibition)
⚠ Shellfish allergy — most astaxanthin is synthetic or from microalgae (Haematococcus pluvialis), not shellfish, but verify source
🚩 Red flags
● Synthetic astaxanthin marketed as natural — verify source [1]
6 Interactions
Drug interactions
No clinically significant interactions None
Mechanism: Astaxanthin has no known significant drug interactions [2].
Effect: No concerns [2].
Action: No precautions needed [2].
Supplement synergies
Omega-3 fatty acids · 1–2 g EPA+DHA
Both are lipophilic membrane protectors. Astaxanthin also prevents omega-3 oxidation in supplements [1].
Both are lipophilic membrane protectors. Astaxanthin also prevents omega-3 oxidation in supplements [1].
Vitamin E · 15 mg/day
Complementary lipid-soluble antioxidants [1].
Complementary lipid-soluble antioxidants [1].
7 Regulatory
United States (FDA): GRAS as food colorant (since 1999). Dietary supplement [1].
European Union (EFSA): Approved food colorant (E161j). Available as supplement. No authorized health claims [2].
Japan: Widely used supplement. Major market for astaxanthin products [2].
South Korea: Available as dietary supplement. Approved claims: antioxidant.
8 US supplement products
211
on-market products containing Astaxanthin (NIH DSLD)
Brands carrying Astaxanthin (99)
Click a brand to see its Astaxanthin products.
9 Frequently paired with
10 Cite this page
Vancouver: Pkhakadze G. Astaxanthin — safety profile [Internet]. Tbilisi: PHIG; 2026 [cited 2026 Sep 01]. Available from: https://supplement.ge/ingredients/astaxanthin/
APA 7th: Pkhakadze, G. (2026). Astaxanthin — Safety profile. Public Health Institute of Georgia. https://supplement.ge/ingredients/astaxanthin/
📋 Editorial information
Author: Prof. G. Pkhakadze, MD, MPH, PhD
Institution: Public Health Institute of Georgia (PHIG)
Affiliation: David Tvildiani Medical University (DTMU)
First published: January 2026
Last reviewed: 2026-05-29
Next review: March 2027
References: 3 cited sources
COI: SupplementIndex receives no funding from supplement manufacturers. All content independently authored by PHIG.
Process: Systematic literature review
📄 License & reuse
Published under Creative Commons Attribution 4.0 International (CC BY 4.0). You may share and adapt for any purpose with attribution.
Pkhakadze G. "Astaxanthin — Safety Profile." SupplementIndex, PHIG, 2026. https://supplement.ge/ingredients/astaxanthin/ CC BY 4.0.
GP
Prof. G. Pkhakadze, MD, MPH, PhD
Professor of Public Health · Head of Department, DTMU
Editor-in-Chief, Georgian Medical Journal (ISSN 3088-4322)
Chair, Public Health Institute of Georgia · UEMS Public Health Section
Educational and public health purposes. CC BY 4.0. Consult your healthcare provider before starting any supplement. Corrections: info@accreditation.ge. Publisher: PHIG