Methylliberine is an isolate of , tea, cola nuts, guarana, cocoa bean, and yerba mate.
Pharmacology
Pharmacodynamics
Based on its structural similarity to
caffeine and
theacrine methylliberine is widely believed to be an adenosine receptor antagonist, although as of 2023 no scientific studies have been done to confirm this action.
There is no evidence that methylliberine augments dopamine receptors in a way that is distinct from caffeine, contrary to claims made by the manufacturer.
Pharmacokinetics
Methylliberine has a short half-life of only 1.5 hours compared to the 5- to 7-hour half-life of caffeine.
An interaction study showed concomitant administration of both caffeine and methylliberine increases the half-life of caffeine by about 2 fold.
This is likely due to inhibition of the CYP1A2 enzyme.
