Feedback on Anti-Aging Serum Formulation: Texture, Irritation, and Moisture

Subject: Review of Anti-Aging Serum Formulation

Thank you for sharing your formulation for skin rejuvenation and wrinkle reduction. The ingredients you've chosen - Repair Activator (Bifida Ferment Lysate), Double Hyaluron Liquid, Pitera (Galactomyces Ferment Filtrate), Perfect-C (Ascorbyl Tetraisopalmitate), Copper Peptide, and Pep®-Coll (Syn-Coll) - are all excellent choices known for their benefits in anti-aging, repair, and improving skin texture and tone.

Regarding your goals for a serum texture, reduced irritation, and moderate moisture:

1. Double Hyaluron Liquid (10%): As C7 mentioned, 10% is a very high concentration for Hyaluronate and will likely result in a sticky or heavy texture, especially if you only need moderate moisture. To achieve a lighter serum feel and moderate hydration, we recommend reducing the concentration significantly, perhaps to 1-3%.
2. Serum Texture & Base: With the Hyaluronate reduced, you'll need a base for your serum. Purified water will be the primary component. You can add a small amount of a lighter humectant like Propanediol (3-5%) to provide additional hydration without stickiness. A small amount of a suitable thickener (like Carbomer or Xanthan Gum at 0.1-0.5%) might be needed to achieve a serum consistency, depending on the final ingredient mix.
3. Reduce Irritation & Soothing: To further reduce potential irritation and add soothing benefits, consider adding ingredients like:
   • Niacinamide (Vitamin B3): At 2-5%, it helps strengthen the skin barrier, reduce redness, and improve overall skin health.
   • Panthenol (Vitamin B5): A great humectant and soothing agent, typically used at 1-2%.
   • Allantoin: Known for its soothing and healing properties, usually used at 0.1-0.5%.
   • Centella Asiatica Extract (Cica): Excellent for calming irritation and supporting skin repair. Use according to supplier recommendations.
4. Moderate Moisture: Reducing Hyaluronate and adding a lighter humectant like Propanediol or Panthenol will help achieve moderate moisture without the heaviness of 10% Hyaluronate.
5. Other Important Considerations:
   • pH Adjustment: The final pH of the serum is crucial for the stability and efficacy of ingredients (especially Vitamin C and peptides) and for skin comfort. Aim for a skin-friendly pH, typically between 5.0 and 6.0.
   • Preservation: Since this is a water-based product, a broad-spectrum preservative system is absolutely necessary to prevent microbial growth. Choose a preservative compatible with your ingredients.

To give you the most tailored advice, could you please share your skin type, as C7 asked? Knowing whether your skin is oily, dry, combination, or sensitive will help refine the recommendations for the base and hydration level.

Overall, your ingredient selection is promising for anti-aging. Adjusting the Hyaluronate percentage and adding soothing/barrier-supporting ingredients will help you achieve a more comfortable and effective serum for rejuvenation and wrinkle reduction with moderate moisture and less irritation.