The main thing about P2P meth is that there's so much of it (2022)

# Summary The article examines whether methamphetamine synthesized from P2P (phenylacetone) since around 2009 differs chemically from older ephedrine-based meth, following claims that P2P meth causes more severe behavioral problems. While P2P synthesis initially produced equal mixtures of d-methamphetamine and l-methamphetamine (the inactive isomer), the ratio shifted toward pure d-meth by 2019, suggesting the composition became more potent rather than fundamentally different. The evidence does not clearly support that P2P meth's chemical composition alone explains increased psychotic symptoms, though contamination with other substances remains a possible factor.