Isochrysis Extract for Stable Self-Tanning
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Solution Overview
Problem
Current self-tanning products using dihydroxyacetone and erythrulose induce oxidative stress, generate free radicals, and lack natural sun protection, while biologically acting tanners like acetyl tyrosine require medical indications and have stability issues in cosmetic formulations.
Innovation Solution
A supercritical fluid CO2 extract of Isochrysis sp., particularly Tahitian Isochrysis, with controlled carotenoid, chlorophyll, and fatty acid content, which increases cutaneous melanin, reduces oxidative stress, and improves skin and hair hydration without intense color or odor, allowing for stable and easy formulation in cosmetic products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If dihydroxyacetone is used as a self-tanning agent, then skin browning is achieved, but oxidative stress and free radical generation occur
Solution Approach 1:
The patent extracts and isolates specific antioxidants (vitamin E, carotenoids, polyphenols) from plant sources to create a composition that counteracts the oxidative stress caused by dihydroxyacetone, while maintaining the desired skin browning effect
Solution Approach 2:
The patent converts the harmful oxidative stress and free radicals generated by dihydroxyacetone into beneficial effects by adding antioxidants that neutralize these harmful byproducts, transforming a harmful chemical reaction into a beneficial protective mechanism
2Ease of manufacture
If dihydroxyacetone is used for self-tanning, then skin browning is achieved, but the tan lacks natural sun protection
Solution Approach 1:
The patent creates a composite formulation combining dihydroxyacetone (for browning) with natural antioxidants from plant sources (for protection), resulting in a multi-functional product that provides both cosmetic tanning and protective benefits
3Quantity of substance
If carotene preparations are consumed to increase skin carotene levels, then skin turns orange-yellow, but the tone does not resemble natural tan
Solution Approach 1:
The patent applies antioxidants locally to the skin surface through topical application, allowing the active ingredients to work directly at the site of dihydroxyacetone action without altering the overall skin tone to an unnatural orange-yellow hue
4Ease of manufacture
If self-tanning products are used to achieve skin browning, then tan is obtained, but formulation stability is poor
Solution Approach 1:
The plant-derived antioxidants serve as intermediary substances that stabilize the formulation by neutralizing free radicals and preventing degradation of the dihydroxyacetone and other formulation components, thereby improving overall product stability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The extract provides a natural, stable, and effective means to enhance skin and hair pigmentation, reduce oxidative stress, and improve hydration, offering a faster and longer-lasting tan with improved formulation properties compared to existing products.
Implementation Method 1
a supercritical fluid CO2 extract of Isochrysis sp. and/or Tisochrysis sp. for increasing pigmentation of human skin
Implementation Method 2
the extract according to the invention significantly reduces oxidative stress induced changes
Data Source
AI summary
Suggested is a supercritical fluid CO2 extract of Isochrysis sp. and/or Tisochrysis sp. comprising: a) not more than 1.5% b.w. of carotenoids; b) not more than 2.0% b.w. of chlorophylls; and c) at least 15% b.w. of free fatty acids, each weight percentage amount based on the total weight of the extract, wherein the extract has a gardner color value of not more than 9 at an extract concentration of 0.018% in oil.