Does niacinamide help with acne scars?

Niacinamide (vitamin B3) shows promising effects for improving the appearance of acne scars through several key mechanisms:

Evidence-Based Benefits:

Niacinamide helps fade post-acne marks by regulating melanin production, which can reduce the dark discoloration (post-inflammatory hyperpigmentation) often left behind after acne heals. Research indicates it can boost collagen production, potentially helping with shallow, atrophic acne scars by supporting skin structure repair.

Here's how it works:

Hyperpigmentation Reduction

• Inhibits melanin transfer to skin cells
• Helps even out skin tone where acne has left dark marks
• Works gradually over 8-12 weeks with consistent use

Skin Barrier Support

• Increases ceramide production to strengthen the skin barrier
• Reduces inflammation that can worsen scarring
• Helps skin retain moisture for better healing

Collagen Enhancement

• Stimulates proteins that help build and maintain skin structure
• May improve the appearance of shallow, indented scars
• Works best when used consistently long-term

Important Considerations

While niacinamide can help with surface-level scarring and discoloration, deep, pitted acne scars typically require professional treatments like microneedling or laser therapy for significant improvement. Concentration matters - products with 2-5% niacinamide are generally most effective while minimizing irritation risk.

For best results, use niacinamide alongside other evidence-based ingredients like vitamin C (not at the same time), sunscreen, and retinoids as part of a comprehensive skincare routine.

Is there a specific type of acne scarring you're looking to address? This would help me provide more targeted recommendations for your situation.