Multi-Benefit Serum for Combination Skin

Thank you for providing details about your skin concerns and the ingredients you have. You have combination skin with an oily T-zone and dehydrated dry areas, along with concerns about wrinkles on your forehead and under your eyes, uneven skin tone, and enlarged pores. You are looking for a non-sticky, fast-absorbing serum that addresses all these issues in one bottle.

You also asked about the smell of Beta Glucan when mixed in cream. The Beta Glucan extracted from Saccharomyces cerevisiae (yeast extract) is a beige/brown liquid with a natural smell. This natural smell might be what you are perceiving as a 'bood' (rotten/sour) smell. If the smell is bothersome, you might consider using Beta Glucan extracted from oats (available as a powder), which typically has less odor.

Based on your skin concerns and the ingredients you have, here is a proposed serum formula designed to address hydration, wrinkles, uneven tone, and pores, while aiming for a light, fast-absorbing texture. This formula also takes into account the incompatibility between Vitamin B3 and Vitamin C derivatives like Ethyl Ascorbic acid and Perfect-C. Since pore reduction is a key concern, Vitamin B3 is included, and the Vitamin C derivatives are excluded from this specific formula.

Proposed Serum Formula

This formula combines several active ingredients to target your specific concerns:

• Water Phase:

  • Water: Balance to 100%
  • Disodium EDTA: 0.2%
  • MOIST24: 3%
  • Vitamin B3 (Niacinamide): 4%
  • Tranexamic Acid: 2%
  • Activated Resorcinol: 0.5%
  • 4MSK: 1%
  • Yeast Radiance: 2%
  • Cell-Energy (Adenosine): 1%
  • Japanese Cedar: 1%
  • Rosa Hybrid Cell Extract: 1%
  • Ume Extract: 1%
  • Hi-EGCG (Green Tea Extract): 1%
  • N-Acetyl Cysteine: 1%
  • Beta Glucan (Saccharomyces cerevisiae extract): 3%
  • Rice Vitamin (Inositol): 1%
  • Phenoxyethanol SA: 1%

• Oil Phase (Add after water phase is mixed):

  • Active Resveratrol: 1%

• Optional (for scent, use sparingly):

  • Fragrance Oil: 0.1-0.5%

Notes on Formulation:

1. Combine the water phase ingredients (Water, Disodium EDTA, MOIST24, Vitamin B3, Tranexamic Acid, 4MSK, Yeast Radiance, Cell-Energy, Japanese Cedar, Rosa Hybrid Cell Extract, Ume Extract, Hi-EGCG, N-Acetyl Cysteine, Beta Glucan, Rice Vitamin, Phenoxyethanol SA). Ensure all water-soluble powders are fully dissolved. Gentle heating (below 50°C) may help with some ingredients like Tranexamic Acid, but allow to cool before adding heat-sensitive ingredients.
2. Add Active Resveratrol (oil-soluble). Ensure it is fully dispersed or solubilized.
3. Add Fragrance Oil if desired.
4. Mix thoroughly until homogeneous.
5. For Beta Glucan (Saccharomyces cerevisiae extract), ensure the final formula has sufficient viscosity to keep it dispersed and prevent precipitation. If using oat-based Beta Glucan powder, ensure it is fully dissolved in the water phase.
6. As the staff mentioned regarding your previous formula attempt, if you were planning to use a base like Silky Serum Base Plus for emulsification, ensure you have enough water in the formula and use a blender as required by the base. The formula above is designed as a water-based serum, which should be less greasy.

Regarding your question about Ethyl Alcohol for a non-sticky, fast-absorbing serum: While Ethyl Alcohol can contribute to a fast-drying feel, it can also be drying and irritating, especially for skin that feels dehydrated in some areas. Given your combination skin with dry/dehydrated zones, it's generally better to achieve a non-greasy, fast-absorbing texture through careful selection of humectants, minimal oil phase (if any), and appropriate thickeners/texture enhancers rather than relying on alcohol. The proposed formula focuses on this approach.