Many people are concerned about the safety of ultraviolet (UV) radiation. Ultraviolet (UV) rays are produced by the sun. Although they can’t be seen, they are an important part of sunlight and are grouped into different wavelengths: UVA, UVB, and UVC. UVC rays are absorbed by the Earth’s ozone layer, so they do not reach us; UVA rays penetrate skin and cause it to darken or tan. UVB rays are mostly absorbed by the epidermis, which is the top layer of our skin and is responsible for sunburn.
We have all been told to stay out of the sun, apply broad-spectrum sunscreens, avoid tanning beds, and take other precautions to avoid being exposed to UV rays, which are known to cause cancer.
So why would a medical practice specializing in skin care use any kind of UV radiation in treatment?
The difference is in the wavelength. A specific wavelength of UVB (311 to 312nm) is thought to be the most useful range for treating skin conditions. This is referred to as narrowband UVB or TL-01, and it’s the modality we use at Skin First Phototherapy Clinic.
It has been used for decades and many people find it provides a great deal of relief from the symptoms of skin disease.
Many studies have shown that there is no increased risk of cancer in patients who’ve received long-term treatment using narrowband UVB radiation. There are virtually no other side effects (although you may experience a little skin reddening or sensitivity after a treatment).
In short: Targeted narrowband UVB therapy as we deliver at Skin First is very safe for patients.
References:
- National Library of Medicine: The Patient’s Guide to Psoriasis Treatment
- British Association of Dermatologists: Phototherapy – NB-UVB
- Photonet National Clinical Network: Patient Information
- Canadian Dermatology Association: Psoriasis
- Eczema Society of Canada: Ask the Doctor About... Phototherapy