Photobiology is the therapeutic use of light to improve health. Heliotherapy is the therapeutic use of sunlight
In the late 19th century, we started gaining a great deal of knowledge about how light acts on the human body, starting with the experiments of A. Downes and T.P . Blunt, who discovered that UV radiation kills bacteria
From 1900 to 1950, phototherapy was a state-of-the-art therapeutic intervention in medicine. Today, much of what was common knowledge has been lost, and we’re now rediscovering the vital importance of sunlight
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