howtosupplement
Beauty/Cognition/Inflammation

Astaxanthin

Marine carotenoid antioxidant that may improve skin hydration and ease visual fatigue in adults with high sun or screen exposure.

Astaxanthin

Astaxanthin

45
score
C
evidence
Caution
risk
Quick Take

Useful mainly for skin and possibly screen-related eye strain; promising, but not a must-have for most adults.

Astaxanthin is a red-orange xanthophyll carotenoid found in microalgae, salmon, trout, shrimp, and krill; supplements usually use Haematococcus pluvialis. It sits within cell membranes and helps limit singlet oxygen and lipid oxidation while also influencing antioxidant and inflammatory signaling. Human studies most often show better skin moisture, some reduction in photoaging and UV-related skin stress, and possible relief of screen-related visual fatigue. It is most relevant for adults with dry or sun-exposed skin and heavy daily screen use.

Proven Benefits

01
Improves skin moisture
02
Reduces visual fatigue
03
May reduce fine lines
04
May lower oxidative stress
05
May reduce UV skin damage
06
May lower CRP/inflammation

Protocol

Amount
6-12 mg
Frequency
Once daily
When
With a meal containing fat; any consistent time of day is fine.

Onset Time

4-8 weeks for skin and visual effects; 8-12 weeks for biomarkers

Who Should Consider

Adults with dry or photoaged skin
People with high daily screen time
Adults with frequent sun exposure
People who rarely eat salmon or trout
Adults seeking skin-focused antioxidant support

Food Sources

  • Sockeye salmon (~2-4 mg per 100 g)
  • Rainbow trout (~0.5-1 mg per 100 g)
  • Shrimp or crab (~0.1-0.5 mg per 100 g)

How It Works

Astaxanthin is fat-soluble and spans the cell membrane, where it helps neutralize singlet oxygen and lipid peroxides on both the inner and outer membrane surfaces. This can reduce oxidative damage and modestly dampen inflammatory signaling pathways such as NF-κB while supporting membrane stability in skin and eye tissues.

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