Benzoic Acid Skin-Darkening Composition for Natural Melanin Induction

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Solution Overview

Problem

Existing skin darkening methods, such as chemical agents and controlled UV exposure, are harsh, unpredictable, or have negative consumer perceptions, while natural methods to increase melanin synthesis for UV protection are lacking.

Innovation Solution

A composition containing specific benzoic acid derivatives (C7 to C12 alkyl and alkyloxy benzoic acids) is used to stimulate melanin synthesis in human skin, providing a safe and effective way to darken skin naturally.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If chemical agents are used to darken skin, then skin darkening effect is achieved, but the agents are harsh and wash off easily

Engineering Contradiction:
Improveskin darkening effectVSAvoidharshness and washability
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces chemical deposition mechanisms with a biological stimulation mechanism. Instead of using harsh chemical agents that deposit on skin and wash off, the invention uses benzoic acid derivatives to stimulate melanocytes to produce melanin naturally, creating a permanent color change that cannot be washed off.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces benzoic acid derivatives as intermediaries that mediate between the user's skin and the desired tanning effect. These compounds act as signaling molecules that trigger the skin's natural melanin production pathway, avoiding direct chemical deposition while achieving the same cosmetic effect.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If controlled UV exposure is used to get tanned, then skin darkening is achieved, but it is difficult to calculate the desired dose and may cause skin cancer

Engineering Contradiction:
Improveskin darkening effectVSAvoiddose calculation complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces the complex UV exposure system with a simple topical application system. Instead of requiring controlled UV dosing equipment and calculations, the user simply applies a cream containing benzoic acid derivatives, which then stimulates melanin production through natural biological pathways.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent converts the harmful effect of UV radiation (which stimulates melanin production as a protective response) into a beneficial effect by using benzoic acid derivatives to trigger the same melanin production pathway without the damaging UV exposure. This captures the protective benefit while eliminating the harmful effects.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

3Reliability

If DHA is used as sunless tanning agent, then skin darkening is achieved, but consumer perception is negative and it turns yellow rather than brown

Engineering Contradiction:
Improveskin darkening effectVSAvoidconsumer acceptance
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The patent changes the fundamental mechanism parameter from chemical deposition (DHA reacting with skin proteins) to biological stimulation (benzoic acid derivatives triggering melanin synthesis). This parameter change transforms the outcome from yellow-brown deposited color to natural brown melanin color, improving consumer acceptance.

Inventive Principle:
Principle #35Parameter changes

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 benzoic acid derivatives induce significant melanin production without cytotoxicity, offering UV protection and a natural-looking tan with improved safety and efficacy compared to traditional methods.

Implementation Method 1

Melanin is the black pigment present in our hair and skin and is synthesized by melanosomes from tyrosine. Melanocytes, a cell type present at dermis-epidermis junction. Tyrosine is acted upon by an enzyme, tyrosinase, which is the key step in melanogenesis.

Methodology Applied
Scientific EffectMelanogenesis: Chemical Bonding

Implementation Method 2

The melanocytes transfer melanin to the keratinocyces which are in their vicinity where it (melanin) serves to protect cellular DNA from UV-induced damage by virtue of its ability to absorb UV-radiation.

Methodology Applied
Scientific EffectUV radiation absorption: Absorption (EM radiation)

Data Source

PatentEP3720414B1A skin darkening composition
Publication Date: 2025.12.31 UNILEVER GLOBAL IP LTD
  • EP3720414B1 patent drawing
  • EP3720414B1 patent drawing
  • EP3720414B1 patent drawing

AI summary

The invention relates to a composition and a method of darkening human skin. The composition comprises select alkyl or alkyloxy benzoic acids.