Formulation Challenges for Whitening Gel with Cellulite Ingredients and Separate Lotion

Based on the information provided by the staff:

1. Adding Slim-Coffee™ to the Whitening Gel:

   • Yes, you can add Slim-Coffee™ 10% to your original whitening gel formula.
   • Staff C7 recommends adding a penetration enhancer like Ethoxydiglycol (5-10%) or 1,2-Hexanediol (3%) to help both Vitamin C and Slim-Coffee™ penetrate the skin better.

2. Separate Cellulite Lotion Formula:

   • Your proposed formula using Light Cream Maker is not suitable because Light Cream Maker is incompatible with electrolytes like Slim-Coffee™.
   • Staff C7 suggests a revised formula using Butter Cream Maker which is electrolyte-tolerant:
     • Slim-Coffee™ 10%
     • L-Carnitine 3%
     • Ginger Oil 1%
     • Chili Hot™ 0.5%
     • Lipid Soft Lite 7%
     • Butter Cream Maker 3%
     • Cetearyl Alcohol or Cetyl Alcohol 1-3% (Adjust based on desired thickness)
   • Adjusting to a Serum or Gel Texture: You can make the texture thinner (more like a serum or gel) by reducing the amount of Cetearyl Alcohol or Cetyl Alcohol to about 1% or even omitting it entirely.

3. Combining Ingredients in One Formula:

   • Staff C7 does not recommend combining all ingredients from both the whitening and cellulite formulas into a single product.
   • This is because the cellulite ingredients (like Slim-Coffee™ and L-Carnitine) have a neutral pH, which could raise the pH of the Vitamin C (L-ascorbic acid) formula (which requires a low pH for stability) and likely cause the Vitamin C to degrade faster.
   • Therefore, making two separate formulas (whitening gel and cellulite lotion/serum) is the better approach.

4. Application Order if Using Two Separate Formulas:

   • If you make two separate formulas, it is recommended to apply the product with the thinner consistency first.
   • Generally, the whitening gel will be lighter than the cellulite lotion/serum (which contains oils and thickeners).
   • Therefore, you should apply the whitening gel first.
   • After applying the gel, wait briefly for it to absorb into the skin (you don't need to wait a long time, just until the first layer is no longer sticky) before applying the cellulite lotion/serum.