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silhouette

silhouette of a group of people

mage by Pat Lyn hyperlink credit: https://www.publicdomainpictures.net/en/view-image.php?image=174449&picture=diverse-group-silhouette

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Aging & Geriatrics

Photobiomodulation, the use of light waves to change human biology, has boomed in recent years for all kinds of purposes, at medical clinics and at home. We wanted to know what the science says — and doesn’t say.