Astaxanthin: proven protection against solar damage

Astaxanthin is one of the most powerful natural antioxidants identified within microalgae biotechnology. Its ability to neutralise free radicals generated by UV radiation makes it an essential ingredient for cosmetic formulations aimed at protecting, repairing and strengthening the skin. Recent trials using extracts from Haematococcus pluvialis, the richest natural source of astaxanthin, have shown up to a 17% increase in cell viability in irradiated in vitro models.

Why astaxanthin is highly effective against solar damage

Astaxanthin outperforms many other antioxidants thanks to its unique characteristics:

Lipophilic nature, allowing it to embed within cell membranes.
Highly stable molecular structure, preserving its antioxidant capacity under stress.
Multi‑pathway antioxidant action, including anti‑inflammatory benefits.

These properties make natural astaxanthin from Haematococcus pluvialis particularly valuable for anti‑ageing, advanced photoprotection and post‑sun recovery formulations.

Trial results: up to 17% higher cell viability

Studies using liposomed Haematococcus pluvialis extracts demonstrated significant increases in the viability of UV‑exposed HaCaT cells. When combined with advanced delivery technologies, the active ingredient showed enhanced bioavailability and cellular protection.

These results confirm that astaxanthin is not only a powerful antioxidant, but also a highly functional cosmetic ingredient when properly formulated.

Advanced delivery systems: unlocking astaxanthin’s full potential

Formulating oleoresin rich in astaxanthin presents challenges related to stability and handling. For this reason, the use of liposomal and enhanced ethosomal systems has become crucial, offering:

improved skin penetration
enhanced stability of sensitive compounds
controlled release into deeper layers
better dispersion in cosmetic matrices

These technologies enable natural microalgae extracts to achieve levels of performance comparable to —or even surpassing— synthetic ingredients.

The sustainable value of Hamatococcus pluvialis

Beyond efficacy, Haematococcus pluvialis is a model of sustainable biotechnology, capable of producing high‑value bioactives in scalable, resource‑efficient systems such as photobioreactors. Its natural origin, combined with potent functional benefits, fits perfectly with the growing demand for sustainable and traceable cosmetic ingredients.

The role of the IMPRESS Project

This research is part of NEOALGAE’s work within the IMPRESS Project (Horizon Europe), which aims to develop sustainable value chains based on marine and freshwater ingredients.
Within IMPRESS, NEOALGAE contributes to:

optimised microalgae cultivation
development of new bioactive ingredients
creation of innovative prototypes (food, agricultural and cosmetic)
industrial validation of natural molecules such as astaxanthin

IMPRESS accelerates the transition from laboratory research to industrial application, reinforcing the potential of microalgae-derived ingredients across multiple markets.

Conclusion: measurable protection driven by natural innovation

The latest findings reinforce astaxanthin’s role as a cornerstone ingredient in advanced solar damage protection. Combined with novel delivery systems and supported by projects such as IMPRESS, natural microalgae‑based actives are shaping the future of effective and sustainable cosmetics.

By David Alonso Suarez