Formulation Review and Recommendations

Here is a review of your two formulas for melasma, wrinkles, and dry skin, along with recommendations for adjustments.

Formula 1: Melasma, Wrinkles, Dry Skin

This formula contains good active ingredients for targeting melasma and wrinkles, such as Activated Resorcinol, Safe-B3 (Niacinamide), and Tranexamic Acid. It also includes moisturizing and skin-conditioning ingredients like LipidSoft, Reservoir-Tech, Bisabolol, and Isopropyl Myristate, along with Light Cream Maker as an emulsifier and Phenoxyethanol SA as a preservative.

Recommendations for Formula 1:

• pH Adjustment: The optimal pH range for Activated Resorcinol is 4.5-5.5, and Phenoxyethanol SA works best in the range of 2.0-6.0. Safe-B3 and Tranexamic Acid have broader compatible ranges (3-8). To ensure the best efficacy and stability of your active ingredients and preservative, adjust the final pH of the formula to be within the range of 4.5-5.5.
• Stability Enhancers: Activated Resorcinol can discolor over time, and Tranexamic Acid can also experience long-term discoloration. To help prevent this, it is recommended to add 0.2% Disodium EDTA and 0.5% ActiveProtec™ OX to the formula.
• Ingredient Percentages: The percentages used for most ingredients are within the recommended ranges. However, you mentioned "LipidSoft™" without specifying the type. Ensure the specific type of LipidSoft™ you are using is suitable for your desired texture and does not cause issues like clogging at the 5% concentration, especially for acne-prone skin (e.g., LipidSoft Palm might clog pores at higher amounts, while LipidSoft Lite is very light). The 1% concentration of Light Cream Maker is suitable for emulsifying 5% oil.

Formula 2: Melasma, Dark Spots, Wrinkles, Moisturizing (Dry Skin)

This formula utilizes Galactomyces Ferment Filtrate (Pitera) as a base, combined with Rose Hip Oil, Activated Resorcinol, Bisabolol, Isopropyl Myristate, and Light Cream Maker.

Recommendations for Formula 2:

• pH Adjustment: Similar to Formula 1, the optimal pH range for Activated Resorcinol is 4.5-5.5. Galactomyces Ferment Filtrate has a pH range of 4-7, which is compatible. Adjust the final pH of the formula to be within the range of 4.5-5.5 for optimal Activated Resorcinol efficacy and overall stability.
• Stability Enhancers: Add 0.2% Disodium EDTA to help prevent discoloration of Activated Resorcinol.
• Ingredient Percentages: Several percentages are below the recommended minimum usage rates for efficacy:
  • Activated Resorcinol: Increase from 0.05% to at least 0.1%, and ideally up to 1% for better efficacy against melasma and dark spots in a leave-on product.
  • Bisabolol: Increase from 0.05% to at least 0.5%, and ideally 1%, for its anti-irritant and skin-benefiting properties.
  • Light Cream Maker™: Increase from 0.05% to at least 0.5% to function correctly as an emulsifier and thickener. To achieve a cream texture with 2.5% oil, a concentration of 1-1.5% is likely needed.
  • Water: Adjust the percentage of water downwards to accommodate the increased percentages of the other ingredients, ensuring the total formula adds up to 100%.
  • Galactomyces Ferment Filtrate: The 37% concentration is high and within the acceptable range (1-100%), but be aware that high doses might feel slightly greasy according to the product description.

By making these adjustments, you can enhance the effectiveness and stability of your formulations.