What is Astaxanthin? The Antioxidant That Can Cross the Blood-Brain Barrier

Astaxanthin is a powerful antioxidant found in algae and sea life — and it's one of the few that can actually cross the blood-brain barrier. Here's what the latest research says about its benefits.
Coach Susan

This month’s topic is astaxanthin — and it’s one of the most exciting nutrients I’ve come across in a while.

What is Astaxanthin?

Astaxanthin is a red-orange pigment that occurs naturally in certain plants, algae, and sea life. It’s what gives salmon, shrimp, and flamingos their distinctive pink and red hues. It has powerful anti-inflammatory properties that may benefit brain, skin, and eye health, and more.

Research suggests that astaxanthin has various beneficial properties that set it apart from other antioxidants.

Brain Health Benefits

A 2023 review highlights that astaxanthin’s unique chemical structure allows it to cross the blood-brain barrier and reach a person’s brain directly — something most antioxidants cannot do.

The review suggests that astaxanthin can activate certain genetic pathways and support the regeneration and growth of adult brain nerve cells. Its anti-inflammatory properties may also help to limit neuroinflammation, which research associates with aging.

According to a 2024 review, astaxanthin is also a potent antioxidant and may help protect against:

  • Neurodegeneration — a progressive loss of brain nerve cells
  • Cognitive aging — the natural changes in a person’s ability to think, remember, and learn as they age
  • Cognitive decline — the loss of ability to think, learn, and remember

The review suggests astaxanthin has positive effects on cognitive functions. It may help slow neurodegeneration and help protect brain nerve cells from oxidative stress.

Other Potential Benefits

  • Skin health: May help reduce UV-induced skin damage and improve skin elasticity.
  • Eye health: Shown in some studies to help reduce eye fatigue and support retinal health.
  • Exercise performance: Some research suggests it may help reduce muscle damage and inflammation after exercise, supporting faster recovery.
  • Immune support: Its antioxidant activity helps combat oxidative stress throughout the body.

Where to Get Astaxanthin

Natural food sources include wild-caught salmon, trout, shrimp, lobster, and red algae. Because food amounts are often low, many people supplement with astaxanthin capsules. Sport Research is one reputable brand that offers astaxanthin supplements if you’d like to explore adding it to your routine.

As always, talk to your healthcare provider before starting any new supplement.

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