Delaying caffeine intake to 90–120 minutes after waking helps offset cortisol levels in the beginning of the day because adenosine (which builds up during sleep) suppresses when caffeine is immediately consumed, causing a rebound crash in the afternoon, whereas delayed caffeine consumption prevents this crash.
causalpending
Evidence Quote
“if you immediately drink caffeine it temporarily suppresses it but it all comes roaring back in the afternoon many people find that if they delay their caffeine intake to 90 to 120 minutes after waking up that they feel more alert in the morning and they completely avoid that afternoon crash”
Created: 8/13/2026, 7:47:33 AM
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