Serum formulation for oily skin and oil control

Subject: Serum Formulation for Oily Skin

Regarding your serum formulation for oily skin:

Based on the staff's reply, your original formula is generally usable, with the exception of the "สารสกัด 2%" (2% extract) for which details were not provided.

To enhance the oil control properties of the serum, the staff recommended the following adjustments:

• Increase Safe-B3 (Niacinamide) from 2% to 5%.
• Add Zinc PCA at 1%.
• Add AcneBee™ Extra at 1-2%.

Additionally, SelectSorb™ at 2-5% can be optionally added to help absorb excess oil throughout the day, especially if your skin is very oily.

Here is the adjusted formula incorporating these recommendations:

• Distilled Water (น้ำกลั่น): Balance to 100%
• HEC: 1.20%
• Glycerin (กลีเซอรีน): 3.00%
• Preservative (สารกันเสีย): 0.50% (Note: Specific type not provided)
• Safe-B3 (Niacinamide): 5.00%
• N-Acetyl-D-Glucosamine: 2.00%
• L-Carnitine: 2.00%
• Extract (สารสกัด): 2.00% (Note: Specific type not provided)
• Zinc PCA: 1.00%
• AcneBee™ Extra: 1-2%
• SelectSorb™: Optional, 2-5%

Note on Water Percentage: The percentage of Distilled Water should be adjusted to make the total formula add up to 100%. For example, if you use 1.5% AcneBee™ Extra and do not add SelectSorb™, the Water percentage would be 100% - (1.20 + 3.00 + 0.50 + 5.00 + 2.00 + 2.00 + 2.00 + 1.00 + 1.50) = 100% - 18.20% = 81.80%. If you add 1.5% AcneBee™ Extra and 3% SelectSorb™, the Water percentage would be 100% - (1.20 + 3.00 + 0.50 + 5.00 + 2.00 + 2.00 + 2.00 + 1.00 + 1.50 + 3.00) = 100% - 21.20% = 78.80%.

Please ensure you identify the specific "สารสกัด 2%" and "สารกันเสีย 0.50%" you plan to use, as their compatibility and properties are important for the final formulation.