Herb & supplement monograph

Astaxanthin Drug Interactions, Uses, Effectiveness, Safety & More

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS ·Updated July 2026

What is this page for?

First and foremost: how Astaxanthin interacts with medications. The heart of this page is the interaction list — every drug Astaxanthin is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what Astaxanthin is, what people use it for and how strong the evidence is, its safety and side effects, and answers to the questions we’re asked most — written and reviewed by the clinical staff at HelloPharmacist. It’s educational information from our licensed clinical databases, not medical advice, and we don’t sell or endorse products. Our editorial policy

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Reviewed by licensed pharmacists Sourced from Natural Medicines

On this page

Interaction report

Drugs that interact with Astaxanthin

673 medications have a known interaction with Astaxanthin, graded by severity. Select any drug for the full evidence-based detail.

Don’t want to scroll the list? Just ask.

Tell us the medications you take and we’ll check each one against Astaxanthin using our pharmacist-reviewed interaction data.

AI summaries are generated from our Astaxanthin interaction data for education only — always confirm with your pharmacist. How we use AI

2,830 drugs

Read The List Like a Pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
Each drug listed above links to the full report for that exact Astaxanthin combination — clinical detail, likelihood, evidence level, and citations.
Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

The big picture

The kinds of drugs Astaxanthin affects

Every type of medication (drug category) Astaxanthin is known to interact with. Open any category for the detail — or search your exact drug in the checker above.

All 2 drug categories Astaxanthin interacts with

Cytochrome P450 2b6 (cyp2b6) SubstratesCytochrome P450 3a4 (cyp3a4) Substrates

Cytochrome P450 2B6 (Cyp2B6) Substrates

Theoretically, astaxanthin may decrease levels of drugs metabolized by CYP2B6.
In vitro research shows that astaxanthin induces cytochrome CYP2B6 enzyme activity in human hepatocytes. This effect has not been reported in humans.

Likelihood Possible Evidence D

Cytochrome P450 3A4 (Cyp3A4) Substrates

Theoretically, astaxanthin may decrease levels of drugs metabolized by CYP3A4.
In vitro research shows that astaxanthin induces CYP3A4 enzyme activity in human hepatocytes. This effect has not been reported in humans.

Likelihood Possible Evidence D

Monograph

Astaxanthin: Uses, Safety & Side Effects

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Reviewed July 2026 ·

The bottom line

Astaxanthin is a reddish carotenoid pigment with strong antioxidant activity in the lab, and it is widely promoted for skin, eye, heart, and exercise benefits. Early human studies are promising for a few uses, but the overall evidence is still limited and not strong enough to make firm claims. It appears generally well tolerated at typical supplement doses, but talk with your pharmacist or doctor before starting it.

Part used: Pigment extracted from microalgae (mainly Haematococcus pluvialis), yeast, and some seafood
Common forms: Capsules, soft gels, tablets, and as an ingredient in some skin creams

People commonly use it for

Antioxidant support
Skin health and aging
Eye health
Exercise recovery
Heart and inflammation support

Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.

Safety at a glance

OverallUse caution

Generally well tolerated in studies, but long-term safety data are limited.

PregnancyInsufficient reliable information

Insufficient reliable information available; avoid using in amounts greater than those typically found in foods.

Read the full pregnancy detail

BreastfeedingInsufficient reliable information

Insufficient reliable information available; avoid using in amounts greater than those typically found in foods.

Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center). Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

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Overview

Astaxanthin is a natural pigment called a carotenoid. It belongs to the same family of colorful compounds that give carrots and tomatoes their bright colors, but astaxanthin is reddish-pink. It is what gives salmon, shrimp, krill, and flamingos their pink or red color.

Most astaxanthin supplements are made from a type of microalgae called Haematococcus pluvialis, which produces large amounts of the pigment to protect itself from stress and sunlight. It can also come from certain yeasts or be made synthetically. As a supplement, it is most often sold as soft gels or capsules.

People take astaxanthin mainly for its antioxidant properties. It is popularly used for skin health, eye health, heart health, reducing inflammation, and helping with exercise recovery.

How it works

Astaxanthin's main proposed action is as an antioxidant. Antioxidants help neutralize unstable molecules called free radicals, which can damage cells over time. In laboratory studies, astaxanthin appears to be a particularly powerful antioxidant compared with some other carotenoids.

It may also have anti-inflammatory effects by lowering certain signals the body uses to create inflammation. Its unique chemical structure lets it sit within cell membranes, which researchers think may help it protect cells.

It is important to know that much of this information comes from laboratory and animal research. How well these effects work in the human body is still being studied.

Effectiveness

Does Astaxanthin work?

Here’s what the research actually shows for each use — graded by Natural Medicines and reviewed by Dr. Brian Staiger, PharmD.

Evidence overview · 28 uses evaluated

28 Insufficient evidence

How to read these evidence grades

Natural Medicines’ 7-point scale. We show each rating’s label word-for-word.

1EffectiveStrong, consistent evidence it works.

2Likely EffectiveGood evidence, though not yet conclusive.

3Possibly EffectiveSome evidence suggests a benefit.

4Possibly IneffectiveSome evidence it may not help.

5Likely IneffectiveFairly strong evidence it doesn’t help.

6IneffectiveStrong evidence it doesn’t work.

7Insufficient Reliable Evidence to RateToo little research to say either way.

For Astaxanthin, current evidence isn’t strong enough to rate any specific use. The conditions it has been studied for are listed below.

Also studied for 28 conditions — evidence insufficient to rate

Insufficient Reliable Evidence To Rate Age-related cognitive decline