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Redefining Red: Microbial Polyketides in Eco-Friendly Cosmetic Development.

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Natural microbial colorants from Talaromyces amestolkiae offer eco-friendly alternatives in cosmetics. This study shows their antioxidant benefits and improved formulation properties, presenting a sustainable option over synthetic dyes.

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Area of Science:

  • Cosmetic Science
  • Natural Product Chemistry
  • Microbial Biotechnology

Background:

  • Growing consumer demand for natural, health-conscious cosmetics drives research into alternatives for synthetic colorants.
  • Synthetic colorants in cosmetics are often linked to adverse health effects, necessitating safer options.
  • Microbial azaphilone pigments represent a potential source of natural colorants for cosmetic applications.

Purpose of the Study:

  • To develop cosmetic formulations (facial cream, shampoo, jelly stick) using a lyophilized polyketide azaphilone red colorant from *Talaromyces amestolkiae*.
  • To evaluate the antioxidant activity, cytotoxicity, and impact of the natural colorant on cosmetic formulation properties.
  • To assess the stability of the colorant in cosmetic bases and identify limitations and opportunities.

Main Methods:

  • Lyophilization of *Talaromyces amestolkiae* extract to obtain the azaphilone red colorant.
  • Characterization of antioxidant activity (ROS reduction) and cytotoxicity (cell viability).
  • Incorporation into cosmetic bases and assessment of physicochemical properties (pH, rheology, texture analysis, stability).

Main Results:

  • The lyophilized extract exhibited significant antioxidant capacity, reducing ROS by over 75% while maintaining cell viability above 60% at 1 and 5 wt %.
  • Cosmetic formulations showed suitable pH and desirable application properties, with improved spreadability at 1 wt % concentration due to reduced adhesiveness and hardness.
  • Color stability was mainly affected by temperature, with UV light having a minor impact.

Conclusions:

  • The lyophilized polyketide azaphilone colorant from *Talaromyces amestolkiae* is a viable, eco-conscious alternative to synthetic dyes in cosmetic products.
  • The natural colorant provides antioxidant benefits and enhances the functional properties of cosmetic formulations.
  • Microbial colorants show promise for sustainable cosmetics, though stability and regulatory aspects require further investigation.