Serum Formulation for Brightening, Moisturizing, and Anti-aging (Sensitive/Combination Skin)

Based on the interaction and the staff's detailed response, the revised formulation they proposed appears suitable for your needs.

Here is a summary of the revised formula suggested by the staff:

• Vitamin B3 (Niacinamide) 5%
• NAG 4%
• Repair Activator™ (Bifida Ferment Lysate) 8%
• Resveratrol 4%
• Chamomile (Chamomilla extract apigenin) 0.5%
• Beta Glucan (Saccharomyces Cerevisiae) 5%
• MSH White Absorb™ 2%
• Mild Preserved Eco 1% (Preservative)
• Pro Polymer 1% (Thickener)
• Water (remaining part)
• Cyclomethicone (optional, starting at 5% for texture)

This formulation includes several ingredients known for their multi-functional benefits, aligning with your goal for a comprehensive serum:

• Brightening: Vitamin B3, NAG, and MSH White Absorb™ work together to help improve skin radiance and reduce uneven skin tone.
• Moisturizing & Soothing: Beta Glucan, Chamomile, Vitamin B3, and NAG contribute to skin hydration, soothe irritation, and support the skin barrier, which is beneficial for sensitive and combination skin.
• Repair & Anti-aging: Repair Activator™ and Resveratrol provide antioxidant protection and support skin repair processes.

The staff also explained the removal of certain ingredients from your original list, such as Azelaic Acid (due to formulation complexity for beginners), a specific Vitamin C product (if it was the serum type), and Nano Silver (not necessary for your stated skin concerns). They also noted that Cyclomethicone can be added optionally to improve the texture and reduce tackiness.

Overall, the revised formula proposed by the staff seems well-balanced to address your goals of brightening, moisturizing, and having a multi-functional serum suitable for sensitive, combination skin, while also considering ease of formulation for a beginner.