Optimal pH for Apple Stem Cell in Gel Formulation

Based on the information for Apple Stem Cell Extract (AppleCell™ Powder), the recommended pH range for mixing into cosmetic formulations to maintain its stability is 3.5-6.5. The temperature should also be below 40°C.

For the other ingredients in your formula:

• Allantoin is stable and works best in a pH range of 4-8, which overlaps well with the recommended range for Apple Stem Cell.
• Calendula Extract (Water Soluble) has a pH of 5.5-6.5, which is also within the optimal range for Apple Stem Cell.

Therefore, to ensure the stability and effectiveness of the Apple Stem Cell Extract in your gel formula, the final pH of the finished product should be adjusted to be within the 3.5-6.5 range. This range is also suitable for Allantoin and compatible with Calendula Extract.