Red light therapy, also known as low-level light therapy (LLLT) or photobiomodulation, is a non-invasive treatment that involves exposing the body to low levels of red or near-infrared light. The light penetrates the skin and is absorbed by the cells, triggering a series of beneficial physiological responses.

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Red light therapy has been shown to have a range of therapeutic effects, including reducing inflammation, improving circulation, promoting wound healing, reducing pain, and improving skin health.

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One of the key ways that red light therapy affects human physiology is by increasing the production of ATP (adenosine triphosphate), which is the main source of energy for cells. This increase in energy production helps cells to function more efficiently, which can improve overall health and wellbeing.

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Red light therapy also stimulates the production of collagen, a protein that is essential for healthy skin, bones, and connective tissues. This can help to reduce the appearance of wrinkles and fine lines, as well as improve skin tone and texture.

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In addition to these benefits, red light therapy has been shown to have a range of other physiological effects, including improving immune function, reducing oxidative stress, and promoting the growth of new blood vessels.

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Overall, the scientific evidence suggests that red light therapy is a safe and effective treatment that can have a range of positive effects on human physiology. While more research is needed to fully understand the mechanisms underlying these effects, there is ample evidence to suggest that red light therapy is a valuable tool for promoting health and wellbeing.