Formulation Feasibility and Alpha Arbutin pH in Serum

Question

I would like to ask about the feasibility of the following serum formulation (100 ml volume):

Water 95%
Alpha Arbutin 2%
Bio-Yeast Essence™ 2%
Hyaluronic Nano Molecule 0.5%
Hyaluronic Standard Molecule 0.5%

Is this formulation possible? Also, since Alpha Arbutin has a slightly acidic to neutral pH, will adding 2% make the formula too acidic for the other ingredients? If so, can I add a pH adjuster, or should I omit Alpha Arbutin?

MySkinRecipes Expert · Accepted Answer

Formulation Feasibility and pH Concern

Regarding your proposed formulation with Water 95%, Alpha Arbutin 2%, Bio-Yeast Essence™ 2%, Hyaluronic Nano Molecule 0.5%, and Hyaluronic Standard Molecule 0.5% (total 100 ml):

Yes, this formulation is possible to create.
The resulting texture will be quite liquid, with only a slight viscosity provided by the Hyaluronic Acid Standard Molecule.
It is important to add a preservative to this formula to prevent microbial growth.

Regarding your concern about the pH of Alpha Arbutin:

At a concentration of 2%, Alpha Arbutin will cause the pH of the formula to decrease slightly, but not significantly enough to cause issues for the other ingredients or irritate the skin.
Therefore, you do not need to adjust the pH or remove Alpha Arbutin from the formula due to pH concerns.