Formula Review for Melasma, Whitening, and Anti-Aging

This formula includes several beneficial ingredients targeting melasma, skin brightening, and wrinkle reduction, suitable for combination to dry skin.

• Repair Activator (Bifida Ferment Lysate) is included at 10%, which can help with skin repair and anti-aging.
• Pal-GHK (Matrixyl 3000) at 8% is a peptide known for stimulating collagen synthesis and reducing wrinkles. The typical recommended usage is 3-5%, so 8% is a high concentration.
• Tranexamic Acid at 3% is effective for reducing melanin production and is suitable for addressing melasma and dark spots. 3% is the maximum allowed concentration for cosmetic products.
• GlucoBright (Acetyl Glucosamine) at 4% works synergistically with Niacinamide for whitening and reducing dark spots, and also helps boost hyaluronic acid production for hydration.
• Safe-B3 (Niacinamide) at 3% offers multiple benefits including reducing wrinkles, improving skin tone, strengthening the skin barrier, and providing moisture. The combination with Acetyl Glucosamine is excellent for whitening.
• Avocado Oil at 3% provides moisturizing benefits, which is good for combination to dry skin, and contains vitamins beneficial for skin health and anti-aging.
• Light Cream Maker at 1% acts as the emulsifier and thickener in this formula, creating the cream consistency. This percentage is within the recommended usage rate.
• Phenoxyethanol SA at 1% is used as a broad-spectrum preservative. This concentration is within the recommended range (0.5-1.25%) for cosmetic products, helping to prevent microbial growth and ensure product safety.

Overall, the selection of active ingredients is appropriate for the stated goals. The percentages for some actives are on the higher side, which may increase efficacy but also potentially the risk of irritation, although the specific ingredients chosen are generally well-tolerated.

Regarding your questions:

1. Suitability: The formula is suitable for targeting melasma, whitening, and wrinkles for combination to dry skin due to the inclusion of effective ingredients like Tranexamic Acid, GlucoBright, Safe-B3, Repair Activator, Pal-GHK, and the moisturizing Avocado Oil.
2. Viscosity: The ingredient that makes the cream viscous is Light Cream Maker. It functions as both an emulsifier and a thickener.
3. Phenoxyethanol SA Percentage: The 1% concentration of Phenoxyethanol SA is within the recommended usage range for cosmetic products (0.5-1.25%) and is considered appropriate for preserving the formula and preventing microbial contamination. As the staff reply mentioned, preservatives are essential for product safety and regulatory compliance. While some preservatives can cause irritation, using them at recommended levels, as you have done, minimizes this risk. Phenoxyethanol SA is designed to be a safer alternative with reduced irritation potential compared to using Phenoxyethanol alone.