Cognition Coffee Research
Coffee Jitters: Why They Happen
“Jitters” commonly describes shakiness, restlessness or feeling overstimulated after caffeine. Sensitivity varies, and total caffeine can come from coffee, tea, energy products and supplements.
Useful first checks
Review serving size, number of caffeinated products, timing and whether a new supplement adds stimulant ingredients. Persistent or concerning symptoms deserve medical attention rather than supplement experimentation.
Related: coffee crash and caffeine + L-theanine.
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.