Oui, you can safely combine red and blue light therapy in the same treatment session. This may make the treatment work better for some skin and health problems. Here’s what you need to know:
Why combine red and blue light?
The Benefits of Red Light (630–660nm):
It can penetrate deeper into the skin to stimulate collagen, reduce inflammation and speed up healing.
Blue light (415–450nm):
Targets surface → kills acne bacteria (P. acnes), reduces oil production.
When used together, they work really well against acne. Blue light kills bacteria and red light reduces redness and scarring.
For anti-aging: Red boosts collagen while blue may improve skin texture.
How to Use Them TogetherOption 1: Sequential TreatmentExample:
Start with blue light (5–10 minutes) to target acne.
Then use red light (10–20 minutes) to calm the skin and promote healing.
Option 2: Simultaneous TreatmentSome devices (Par exemple, CurrentBody Mask, Dr. Dennis Gross SpectraLite) emit both wavelengths at once.
Option 3: Alternating Days
Blue light on Monday, Wednesday and Friday for acne.
Red light on Thursdays, Saturdays and Sundays is good for anti-ageing.
Best uses for combined therapy
Acne-prone skin
Blue light kills bacteria; red reduces inflammation and marks left by acne.
Study: UN 2009 study in the Journal of Cosmetic and Laser Therapy found that using both wavelengths together improved acne by 77% compared to using blue light alone.
Oily and ageing skinBlue regulates oily skin; red smooths wrinkles.
Post-Procedure Healing
After facials/peels, red light speeds recovery while blue prevents breakouts.
Sécurité & Precautions
✅ Generally safe for most skin types (non-UV, non-invasive).
⚠️ Avoid if:
You have porphyria or lupus (blue light sensitivity).
You use medications that make your skin sensitive to light (e.g. Accutane, certain antibiotics).
🔹 Start slow: 3–5 minutes per light, 2–3 times per week, then increase.
Pro tip:
If you have severe acne, combine blue light with salicylic acid or niacinamide as the blue light can make these work better. If you want to try something for anti-aging, add a vitamin C serum before using red light.
