Is Red Light Therapy Like a Vitamin D or Tanning Bed?

Many people wonder, "Is red light therapy like a tanning bed or sunshine lamp?" The answer is no — red light therapy (RLT) uses 660nm and 850nm wavelengths that do not include UVB rays, which are required to trigger vitamin D production or cause tanning. There's no tanning effect and no ultraviolet radiation involved.

However, red light therapy does offer complementary skin benefits that support safe sun exposure and potential vitamin D synthesis. Studies show that red and near-infrared light (NIR) can prepare and protect the skin, reducing the risk of sunburn when exposed to UVB light. One study demonstrated less sunburn when skin was pre-treated with longer-wavelength light. Red light therapy may also increase epidermal thickness, giving your skin more UVB-absorbing cells that can contribute to natural vitamin D production.

In essence, while red light therapy doesn’t produce vitamin D directly, it enhances your skin's resilience to sun exposure, making it a useful addition to your wellness routine if you’re looking to maximize vitamin D benefits safely.