Red vs Blue Light Therapy: They Are Not Alternatives

Penetration depth of blue, red and near-infrared light in skin, shown in millimetres

The red vs blue light therapy question is usually asked as though one has to win. It does not work that way. The two wavelengths treat different conditions, by different mechanisms, at different depths in the skin. Choosing between them is less like choosing between two moisturisers and more like choosing between an antibiotic and … Read more

What Does Green Light Therapy Do? The Evidence, Split in Two

Green light reaches skin and eyes by two different pathways, only one of which a face mask can use

Ask what does green light therapy do and you get two answers that have almost nothing to do with each other. One concerns pigmentation and is the reason green appears on LED face masks. The other concerns migraine, has considerably stronger research behind it, and works through a mechanism a face mask cannot use. Separating … Read more

7 Color LED Light Therapy Chart: What Each Wavelength Does

Visible light spectrum showing the wavelength range of each colour used in LED light therapy

A 7 color LED light therapy chart is the mode table printed on the box of a consumer LED face mask, listing each light setting alongside a wavelength in nanometres and a claimed skin benefit. Seven modes is now the common configuration, typically red, blue, green, yellow, purple, cyan and white. The chart below sets … Read more