# Astaxanthin: An Exceptional Carotenoid

> Astaxanthin is a natural carotenoid from microalgae with an exceptionally high antioxidant capacity in laboratory analyses. What the studies say and which WOO® products contain it.

Astaxanthin is often promoted as an exceptional antioxidant, but how relevant are this carotenoid's impressive laboratory results for the human body? A critical look at the scientific data is essential to understand the real benefits and limits of astaxanthin and to put its role in supplementation into proper perspective.

## Origin and Properties

Astaxanthin is a **xanthophyll carotenoid** produced primarily by the microalga *Haematococcus pluvialis*. The alga synthesizes the pigment as a protective mechanism against environmental stress such as UV radiation or nutrient scarcity. Animals like salmon and flamingos get their characteristic coloring by taking in astaxanthin through the food chain. For dietary supplements, **natural astaxanthin** is extracted from cultivated *Haematococcus pluvialis*, which, unlike synthetic variants, contains a broader spectrum of accompanying carotenoids.

## A Unique Cell Protection Function

The molecular structure of astaxanthin allows it to span the entire width of a **cell membrane**. This means it can protect both the water soluble (hydrophilic) and the fat soluble (lipophilic) regions of the cell. Unlike other antioxidants, which often act in only one of these environments, astaxanthin offers **comprehensive protection** for cell membranes. This unique property contributes significantly to its potential benefits.

## Antioxidant Activity and Human Studies

In laboratory tests, astaxanthin shows a high antioxidant capacity, but this cannot be directly translated into biological effects in the human body. The FDA has withdrawn **ORAC values** as a reference for health claims, since the complexity of metabolism in the body cannot be reproduced in a test tube. Nevertheless, there are promising human studies showing positive effects in areas such as **skin health**, **athletic endurance** and **eye health**. The EFSA considers a daily intake of 4 mg safe, and clinical studies have tested doses of 4-12 mg without notable side effects.

Astaxanthin is fat soluble, so taking it with a meal that contains dietary fat considerably improves its **bioavailability**.

**[WOO® Beauty Caps](/en/shop/woo-beauty-caps-can)** contains natural astaxanthin combined with collagen, hyaluronic acid and Q10. **[WOO® Liquid Energy](/en/shop/woo-liquid-energy)** contains astaxanthin for the sports context. Available in our shop.

## Frequently Asked Questions

**What is the best way to take astaxanthin?**
Astaxanthin is fat soluble. For optimal absorption, take it with a meal that contains some fat. This considerably improves bioavailability.

**Can astaxanthin change your skin color?**
At very high doses, a harmless slight orange tint of the skin can occur, known as carotenodermia. This is comparable to the effect of eating too many carrots.

**Is synthetic astaxanthin as effective as natural astaxanthin?**
Natural astaxanthin from *Haematococcus pluvialis* shows higher antioxidant activity than synthetic astaxanthin in laboratory comparisons. The clinical relevance of these differences in humans is still the subject of ongoing research.

## Sources
Tominaga et al. (2012), Journal of Clinical Biochemistry and Nutrition - Cosmetic benefits of astaxanthin.
Earnest et al. (2011), Int J Sports Med - Effect of astaxanthin on cycling time-trial performance.
EFSA (2014), Scientific Opinion on astaxanthin from Haematococcus pluvialis.

*WOO® Beauty Caps in the NEMAPO shop.*