Adjusting and Stabilizing pH in Homemade Cosmetic Formulations

Question

Regarding the optimal pH for skin mentioned in the post "best-ph-for-skin-t1363.html", how can I adjust and stabilize the pH of my homemade cosmetic formulations to be suitable for the skin? What ingredients can be used to lower or raise the pH, and what can be used as a buffer?

MySkinRecipes Expert · Accepted Answer

How to Adjust pH in Cosmetic Formulations

To adjust the pH of your homemade cosmetic formulations, you will need different ingredients depending on whether you want to increase or decrease the pH.

To lower the pH (make it more acidic): You can use acidic ingredients such as Citric Acid or Malic Acid. Add these gradually in small amounts to the water phase of your formulation and measure the pH until you reach the desired level. Be careful as pH can change quickly.
To raise the pH (make it more alkaline): You can use alkaline ingredients such as Sodium Hydroxide or AMP (2-MINO-2-METHYL-1-Propanol) 95%. Add these gradually to increase the alkalinity and measure the pH.
To stabilize the pH (buffer): Ingredients like Sodium Citrate can be used as a buffer to help maintain the pH of the formulation at the desired level, preventing it from changing over time.

Always measure the pH using a reliable pH meter or pH strips designed for cosmetic formulations to ensure accuracy. Adjusting pH is crucial for product stability, efficacy, and skin compatibility.