The claimEvidence A · guideline-tier
Coffee fully covers an all-nighter
The evidence
Receptor ceiling is 400 mg. What coffee pushes through is the feeling of sleepiness, not the underlying impairment — working memory + error rate stay degraded.
Receptor ceiling is 400 mg. What coffee pushes through is the feeling of sleepiness, not the underlying impairment — working memory + error rate stay degraded.