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Comparisons•October 18, 2024
Red Light vs. Blue Light Therapy: Different Tools for Different Jobs
5 min read
Red and blue light therapy often get lumped together, but they work through completely different mechanisms. Here's how to know which one you need.
Wavelengths
The Core Difference
400-495nm
Blue Light
Surface antibacterial
630-700nm
Red Light
Deep cellular repair
Bacteria
Blue Light: The Acne Fighter
Blue light kills *P. acnes* bacteria on the skin surface. It is highly effective for inflammatory acne but does not penetrate deeply or help with anti-aging.
- Best For: Active inflammatory acne
- Best For: Preventing breakouts
- Limit: Can be drying with overuse
Repair
Red Light: The Healer
Red light boosts cellular energy and reduces inflammation. It supports the skin's healing process.
- Best For: Anti-aging & collagen
- Best For: Healing acne scars & lesions
- Best For: Reducing inflammation
The Power Combo
For acne, combining both is ideal. Blue light kills the bacteria, and red light heals the inflammation and prevents scarring.
Conclusion
The Verdict
Red light is the more versatile tool for general health and anti-aging. Blue light is a specialist for acne. If you don't have active acne, red light provides far more benefits.