A top Drug Enforcement Administration (DEA) has affirmed that spores that produce so-called magic mushrooms are not, on their own, federally prohibited.

DEA's Drug & Chemical Evaluation Section Chief Terrence Boos was asked about the legal status of the spores in a letter from attorney Michael McGuire in November, and he sent a response on Tuesday that clarified the agency's position.

"If the mushroom spores (or any other material) do not contain psilocybin or psilocin (or any other controlled substance or listed chemical), the material is considered not controlled" under the Controlled Substances Act (CSA), Boos wrote.

"However...