NASA originally began experimenting with red light therapy on plant growth in space and then to help heal wounds in astronauts. Like many developments, other potential uses began to be investigated.

NASA originally began experimenting with red light therapy on plant growth in space and then to help heal wounds in astronauts. Like many developments, other potential uses began to be investigated.

Red light therapy is promoted as a treatment for some common skin conditions, including to:

Most experts say that they don’t know yet if RLT is effective for all its claimed uses. Most say that the studies published so far show some potential for certain conditions, but that more studies need to be conducted. Red light therapy is still an emerging treatment that’s generating growing interest. But at this point in time, there’s not enough evidence to support most uses.

Red light therapy appears to be safe and is not associated with any side effects, at least if used short-term and as directed. This therapy is not toxic, not invasive and not as harsh as some topical skin treatments. Unlike the cancer-causing ultraviolet (UV) light from the sun or tanning booths, RLT doesn’t use this type of light.