When were psychedelics discovered?

From Dr. David Luke’s Garden Talk “Could psychedelics unlock our creativity?
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The use of psychedelic substances for medicinal and spiritual purposes dates back to ancient times. We know that the Indigenous peoples of the Americas have used psychedelic plants, such as peyote, for ceremonial and healing purposes for centuries.

The active ingredients in these plants, such as mescaline, were first isolated and synthesized by researchers in the late 19th and early 20th centuries. LSD (lysergic acid diethylamide), a synthetic psychedelic drug, was first synthesized in 1938 by Swiss chemist Albert Hofmann.

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