Astaxanthin

Best for

Raise protective carotenoid levels

Large effect, needs confirmation · 7–12 mg/day for 4–8 weeks · 3 studies , n=70

36 papers · 4 claims · 127 outcomes scored · 3 positive

Outcomes

What astaxanthin actually does, by outcome

Each row is one outcome with effect size, evidence base, the dose that worked in trials, and time to first effect. Magnitude tiers come from native-unit MCID where available, Cohen's d otherwise.

Outcome Effect size Evidence Dose Weeks Rank

Raise protective carotenoid levels Large effect, needs confirmation

Plant pigments reach your bloodstream and protect cells from oxidation.

3 RCTs n=70 7–12 mg 4–8 wk #4/7

20205737·30379308·32231404

large

3 RCTs n=70

7–12 mg

4–8 wk

#4 /7

Build firmer, denser skin Likely benefit

More collagen density for skin that bounces back and holds its shape.

1 meta-analysis n=221 2–12 mg 8 wk #2/8

34578794

moderate

1 meta-analysis n=221 Meta-analyzed I²=75%

2–12 mg

8 wk

#2 /8

Reduce fine lines and wrinkles Likely modest benefit

Smooths crow's feet, forehead lines, and surface roughness.

1 meta-analysis n=162 2–12 mg 8 wk #2/5

34578794

small

1 meta-analysis n=162 Meta-analyzed

2–12 mg

8 wk

#2 /5

Smooth rough, uneven skin Not enough research

Refines texture, shrinks pores, and softens the surface.

1 RCT n=— 4 mg 9 wk

29941810

—

1 RCT n=—

4 mg

9 wk

—

Outcome	Effect	Evidence	Dose	Weeks	Rank
Raise protective carotenoid levels Large effect, needs confirmation	large	3 RCTs n=70	7–12 mg	4–8 wk	#4/7
Build firmer, denser skin Likely benefit	moderate	1 meta-analysis n=221 Meta-analyzed	2–12 mg	8 wk	#2/8
Reduce fine lines and wrinkles Likely modest benefit	small	1 meta-analysis n=162 Meta-analyzed	2–12 mg	8 wk	#2/5
Smooth rough, uneven skin Not enough research		1 RCT n=—	4 mg	9 wk	—

Buy well

Recommended Astaxanthin products

Real products that dose Astaxanthin where the research does, in a clean formulation, from brands we've audited. We only list ones we'd stand behind.

Chosen for adequate Astaxanthin dosing vs. the studied range, a clean formulation (grade A–C), and independent brand-quality audits. Not sponsored.

Risk profile

Adverse events and known drug interactions

Safety events

ecchymosis (bleeding/bruising) severe

elevated INR (INR 10.38) severe

hepatitis E (acute viral hepatitis) severe

headache mild

flatulence mild

muscle pain (myalgia) mild

muscle weakness mild

gastrointestinal upset / dyspepsia mild

Drug interactions

Warfarin major increases toxicity

Valproic Acid moderate increases effect

Indomethacin moderate decreases effect

Cisplatin moderate unknown

5-Fluorouracil moderate decreases concentration

Morphine moderate increases effect

Co-studied with

Supplements that share evidence with astaxanthin

Sources

Generated August 14, 2026

Astaxanthin

What astaxanthin actually does, by outcome

Recommended Astaxanthin products

Adverse events and known drug interactions

Supplements that share evidence with astaxanthin

More evidence for Astaxanthin

From Blue Lobsters to Sun-Safer Skin: How a Sea Pigment Became a Modern Health Tool

Best Supplements for Skin Hydration, Ranked by Clinical Evidence

Carotene (unspecified)

Carotenoid

Goji

Palm Oil

Astaxanthin

Recommended Astaxanthin products

More evidence for Astaxanthin

NewFrom Blue Lobsters to Sun-Safer Skin: How a Sea Pigment Became a Modern Health Tool

NewBest Supplements for Skin Hydration, Ranked by Clinical Evidence

NewCarotene (unspecified)

NewCarotenoid

NewGoji

NewPalm Oil

From Blue Lobsters to Sun-Safer Skin: How a Sea Pigment Became a Modern Health Tool

Best Supplements for Skin Hydration, Ranked by Clinical Evidence

Carotene (unspecified)

Carotenoid

Goji

Palm Oil