Carefully weigh all ingredients and prepare each phase in a separate heat-resistant measuring cup.

Place a small pot with a layer of water on the stove and bring it to a boil. Heat both phase A (demineralized water, niacinamide and Sodium PCA) and phase C (cetyl alcohol, Olivem 1000, shea butter, jojoba oil and MCT oil) in a water bath.

Return phase A to the water bath and add phase C. Mix thoroughly with a spatula or pulse 5 times with an immersion blender until it emulsifies.

Remove the measuring cup from the pan and continue stirring as the mixture cools.

Check the pH, which should be between 5.0 and 5.5. This pH is not only the most pleasant for your skin but also ensures that the preservative can work optimally. Use a 10% solution (in demineralized water) of citric acid to lower the pH or a 10% solution of baking soda (in demineralized water) to raise it. Always add a maximum of 1 drop at a time, stir well and wait at least 1 minute before measuring again. As a guideline: per 100 grams of mixture, 1 drop changes the pH on average by approximately 0.1 to 0.15 pH points. Work carefully and avoid adjusting too much.