Does red/NIR light therapy work through clothes?

The short answer is no. But if the clothing is very thin and light can penetrate it well, then maybe to some extent. How do you know if red light can penetrate it? Simply hold the fabric up next to the light while it’s on and see how much light gets through. You can literally observe it with your naked eye.

Now, with most clothes, they will block at least 50% and more like 80%+ of the light, so if that is the case, just realize that it is massively lowering the dose of the light.

For best results, do it on bare skin.

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