Vitamin D3 Topical Composition for Stability at Higher Water Content
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Solution Overview
Problem
Vitamin D3 stability decreases upon dissolution in water, especially with increasing water content in topical compositions.
Innovation Solution
A topical composition comprising vitamin D3, a nonionic surfactant A (polyoxyalkylene hydrogenated castor oil) and a nonionic surfactant B (other than polyoxyalkylene hydrogenated castor oils), with specific HLB values and content ranges, enhances stability even with higher water content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If water content is increased in the topical composition, then the composition becomes more suitable for topical application and patient comfort, but the stability of vitamin D3 decreases
Solution Approach 1:
The patent introduces nonionic surfactants (specifically polyoxyethylene hydrogenated castor oil and other nonionic surfactants) as intermediary substances that mediate between water and vitamin D3. These surfactants form micellar structures that solubilize vitamin D3 in aqueous environments, allowing high water content formulations while maintaining vitamin D3 stability through the protective micellar environment.
Solution Approach 2:
The patent creates a composite surfactant system combining polyoxyethylene hydrogenated castor oil (nonionic surfactant A) with other nonionic surfactants (nonionic surfactant B). This composite approach leverages the synergistic effects of different surfactant molecules to enhance both the solubilizing capacity and stabilizing effect on vitamin D3, enabling stable high-water-content formulations.
2Ease of operation
If vitamin D3 is dissolved in water to create a topical composition, then the composition achieves good spreadability and patient compliance, but the therapeutic efficacy is reduced due to decreased stability
Solution Approach 1:
Nonionic surfactants serve as intermediary agents that enable vitamin D3 to be dispersed in water-based formulations while maintaining molecular integrity. The surfactant micelles protect vitamin D3 from degradation pathways that would otherwise occur in aqueous environments, thereby preserving therapeutic efficacy while achieving the spreadability benefits of water-based formulations.
Solution Approach 2:
The patent optimizes specific parameters including the HLB values of surfactants (combining surfactants with complementary HLB characteristics), the molar ratio of different surfactants, and the concentration ranges to maximize both stability and spreadability. By carefully controlling these parameters, the formulation achieves optimal balance between therapeutic efficacy and application properties.
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 maintains improved stability of vitamin D3, even with increased water content, ensuring effective therapeutic efficacy.
Implementation Method 1
a nonionic surfactant A, which is a polyoxyalkylene hydrogenated castor oil, and a nonionic surfactant B, which is a nonionic surfactant other than polyoxyalkylene hydrogenated castor oils
Data Source
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AI summary
The present invention provides a technique for further improving the stability of vitamin D3 in a topical composition comprising vitamin D3, even when the amount of water present in the topical composition is increased. Provided is a topical composition comprising vitamin D3, a nonionic surfactant A, which is a polyoxyalkylene hydrogenated castor oil having an average number of moles of alkylene oxide added of 55 or less, and a nonionic surfactant B, which is a nonionic surfactant other than polyoxyalkylene hydrogenated castor oils.