The effects of caffeine consumption do not decay with a ~5 hour half-life

7 hours ago

Caffeine's duration is longer than commonly thought due to its metabolism into paraxanthine, which also blocks adenosine receptors.
Paraxanthine supplements offer a 'cleaner' stimulation with faster clearance and potentially reduced tolerance compared to caffeine.
The relative potency of paraxanthine vs. caffeine is uncertain, with estimates suggesting it may be 1.5-2x as potent, but subjective experiences vary.
Caffeine and paraxanthine's binding affinities to adenosine receptors are not well-established, and studies show significant discrepancies.
The discovery of paraxanthine's role highlights gaps in common knowledge about widely used nootropics, suggesting more low-hanging fruit in cognitive enhancement.
Paraxanthine can be useful for afternoon use without disrupting sleep and for cycling with caffeine to manage tolerance.
The half-life of psychoactive substances does not always accurately predict the duration of their effects, as seen with caffeine, phenibut, and others.

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