Adjusting Serum/Gel Formula for Oily Skin: DMAE Compatibility and Preservation

Question

I have developed a serum/gel formula for skin tightening, wrinkle reduction, and brightening, and I have oily skin. The formula includes Natto Gum, Panthenol, DMAE, and a gel base. I would like feedback on the formula, specifically regarding ingredient compatibility, recommended concentrations for oily skin, potential irritation from DMAE, and the need for a preservative, especially considering the inclusion of Galactomyces Ferment Filtrate.

MySkinRecipes Expert · Accepted Answer

Based on the feedback regarding your formula for skin tightening, wrinkle reduction, and brightening, and considering your oily skin type, here are the recommended adjustments:

Gel Base: The original gel base has an issue with DMAE due to it being an electrolyte, which can weaken the gel. It is recommended to use Pro Polymer at 2-3% as the gel base instead.
DMAE: Reduce the concentration of DMAE to 5%. For first-time users, it is advisable to start with a lower concentration as it can cause skin irritation.
Natto Gum: For oily skin, it is recommended to remove Natto Gum from the formula.
Panthenol: Reduce the concentration of Panthenol to 1-2%.
Preservative: A preservative is necessary for the formula unless the concentration of Galactomyces Ferment Filtrate is more than 60%. If it is less than 60%, you should add a preservative. Consider adding 1,2-Hexanediol at 3% to enhance preservation or use a gentle preservative like Mild Preserved Eco™ (Ethylhexylglycerin + Caprylyl Glycol).

These changes address the stability issue with the gel base, reduce the potential for irritation from DMAE, and tailor the formula for oily skin by adjusting Natto Gum and Panthenol concentrations, while also clarifying the need for a preservative.