Polyunsaturated Fatty Acid Liposome Stabilization
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Solution Overview
Problem
Polyunsaturated fatty acids in cosmetic and pharmaceutical compositions for external use have poor stability over time, leading to decreased effectiveness and potential issues like discoloration and bad smells, necessitating effective stabilization techniques to maintain 90% or more of the active ingredient for three years as required by regulations.
Innovation Solution
Incorporating polyunsaturated fatty acids or their derivatives into liposomes and dispersing them in a dispersion medium containing tocopherol and phytic acid, which enhances stability and prevents degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polyunsaturated fatty acids are mixed in compositions for external use, then skin-whitening effect is achieved, but stability over time deteriorates
Solution Approach 1:
The patent uses tocopherol and phytic acid as intermediary substances that mediate between the polyunsaturated fatty acids and the surrounding environment. These intermediaries act as antioxidants that protect the polyunsaturated fatty acids from oxidation and degradation, thereby maintaining both the skin-whitening effect and stability over time without requiring extreme isolation or modification of the active ingredient.
Solution Approach 2:
The patent creates a composite formulation by combining polyunsaturated fatty acids with tocopherol and phytic acid in specific proportions. This composite material leverages the synergistic effects of its components: the polyunsaturated fatty acids provide skin-whitening benefits while tocopherol and phytic acid provide stabilization, resulting in a formulation that maintains both efficacy and stability over three years.
2Reliability
If polyunsaturated fatty acids are used as active ingredient, then skin-whitening effect is achieved, but composition develops discoloration and bad smells
Solution Approach 1:
The patent converts the harmful oxidative degradation of polyunsaturated fatty acids (which causes discoloration and bad smells) into a beneficial stabilized state. By incorporating tocopherol and phytic acid, the formulation transforms the inherently unstable polyunsaturated fatty acids into a stable composite material that maintains its appearance and odor characteristics over time while preserving skin-whitening activity.
Solution Approach 2:
Tocopherol and phytic acid serve as intermediary protective agents that intervene in the degradation process of polyunsaturated fatty acids. These intermediaries prevent direct exposure of the polyunsaturated fatty acids to oxidative conditions that would cause discoloration and unpleasant odors, thereby maintaining aesthetic and sensory quality.
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 composition achieves high stability of polyunsaturated fatty acids over time, maintaining their skin-whitening effect and preventing unwanted changes like discoloration and odor, thus ensuring effective use in treating melasma and post-inflammatory hyperpigmentation.
Implementation Method 1
incorporating the polyunsaturated fatty acid or a derivative thereof into liposomes
Implementation Method 2
polyunsaturated fatty acids are known to have poor stability over time
Implementation Method 3
adding at least one member selected from the group consisting of tocopherol and phytic acid to the continuous phase
Data Source
AI summary
An object of the present invention is to provide a composition for external use comprising a polyunsaturated fatty acid having higher stability over time. The present invention provides the following composition, in which the stability over time of a polyunsaturated fatty acid is high. A composition comprising a component (A) and a component (B) shown below, the component (B) being dispersed in a continuous phase that contains the component (A): (A) at least one member selected from the group consisting of tocopherol and phytic acid; and (B) liposomes containing a polyunsaturated fatty acid or a derivative thereof.