David E. Nichols is a researcher (specifically pharmacologist and medicinal chemist) at Purdue University (semi-retired in 2012). His psychedelic work has been ongoing since 1969.
Next to research (papers linked below), he is also the founding president of the Heffter Research Institute.
He sits on the advisory board of the MIND Foundation and advises Eleusis.
Learn more on his Wikipedia page.
Not to be confused with Charles D. Nichols (his son), whom he often collaborates with.
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