Cognition Coffee Research
Coffee Crash: Why Energy Can Dip Later
People use “coffee crash” to describe a later drop in perceived energy or alertness. Sleep debt, meal timing, caffeine timing, tolerance and expectations can all contribute, so there is rarely one universal cause.
Don't treat the phrase as a diagnosis
If fatigue is persistent or severe, a healthcare professional can help evaluate causes that a coffee or supplement guide cannot.
Related: coffee & focus and coffee jitters.
Health note: This is educational information, not medical advice. Supplement effects and interactions vary. If you take medication, have a medical condition, are pregnant/nursing, or are sensitive to caffeine, discuss supplements with a qualified clinician.