Question
Is PQQ safe?
In context of PQQ·Insufficient evidence48/100
Our safety read for PQQ is 78/100, summarizing tolerability signals and documented cautions. Generally tolerable in short studies; insomnia and headache appear sometimes.
Full ingredient file
This page is a short answer. Mechanisms, dosing notes, sources, and the rest of the verdict live on the hub for PQQ.
Open PQQ verdictOther questions on PQQ
A few more focused pages for the same ingredient (we keep lists short on purpose).