Adjusting Gel Formula for Oily Skin (Ingredients & pH)

Regarding your gel formula aimed at skin restoration, brightening, oil reduction, and strengthening for oily skin:

Thank you for providing your formula and clarifying the typo ("water Soluble 1%" removed).

Based on your goal of reducing oiliness and the staff's feedback, here are the suggested modifications to your formula:

• Remove:
  • Glycerin 2%
  • Onion Extract 2% (This ingredient is more suitable for specific scar treatment at night, not general use for oily skin)
  • Panthenol 5% (These are moisturizers generally not needed at these percentages for oily skin)
• Add/Adjust:
  • Add Zinc PCA 1% (Helps further reduce skin oiliness)
  • Increase Pro Polymer Gel Maker from 0.5% to 1.5% (To maintain gel consistency, as ingredients like Azelaic Acid and Zinc PCA can thin the formula)
  • Reduce Azelaic Acid from 10% to 5% (Recommended starting point to avoid potential irritation, especially if you haven't used it before. You can gradually increase to 10% once your skin is accustomed)

Regarding your question about pH adjustment:

• Yes, Lactic Acid is suitable for lowering the pH of your formula.
• Adjusting the pH to the range of 5.5-6 is acceptable. This range is generally compatible with skin pH and helps ensure the stability of ingredients like Vitamin B3 (Niacinamide). While Azelaic Acid can be more effective at a lower pH (around 4-5), a pH of 5.5-6 is less likely to cause irritation, which is a good approach, especially when starting with Azelaic Acid.
• When adjusting pH, add Lactic Acid gradually, drop by drop, and measure the pH with a pH meter or test strips until you reach your target range of 5.5-6.

By implementing these changes, your gel formula should be better suited for oily skin while still targeting brightening, restoration, and strengthening.