Serum Formulation for Acne, Brightening, and Oil Control (for Oily Skin)

Thank you for your inquiry. You're looking for a serum with starfish extract as the main ingredient, plus benefits for acne, brightening, and suitable for oily skin.

While a specific product for starfish extract was not found in our current information, we can certainly recommend a formulation focusing on the other benefits you need, using ingredients suitable for oily, acne-prone skin that also help with brightening.

Here is a recommendation for a water-based serum formulation:

• Pep®-Acne (Oligopeptide-10 Anti-microbial Peptide): This peptide helps fight acne-causing bacteria. It is water-soluble and suitable for acne treatment products. Use at 5%.
• Zinc PCA: Excellent for controlling oiliness, reducing acne breakouts, and helping skin heal faster. It is water-soluble. Use at 1.0% for oily skin/acne.
• Licorice Extract (Licochalcone A 1%, Water-Soluble): Helps reduce skin inflammation, redness from acne, irritation, and oiliness. It is water-soluble. Use at 0.5-1.0% for reducing oiliness and treating acne/inflammation.
• Hexylresorcinol AF: A water-soluble ingredient for skin brightening and reducing dark spots. Use at 1-3%.

Formulation Notes:

• This formulation uses water-soluble ingredients, making it suitable for a lightweight serum base ideal for oily skin.
• You will need a suitable water-based serum base or gel maker (refer to basic gel/cream formulation guides) to incorporate these active ingredients.
• Ensure the final pH of your serum is within the optimal range for the ingredients used (generally between 4-6 for Zinc PCA and Hexylresorcinol AF, and 3.5-6.5 for Licorice Extract). Pep®-Acne is soluble in water and avoids heat.
• Always follow the specific mixing instructions and usage rates for each ingredient as provided in their product descriptions.

This combination of ingredients will help address acne, control excess oil, reduce inflammation, and improve skin brightness, providing a comprehensive serum for your skin concerns.