Oral
Oral safety: low
Other forms of Caffeine
Compare absorption and active amounts with sibling forms:
Caffeine alpha-ketoglutarate
Caffeine Anhydrous
Central nervous system stimulant. Consult a healthcare provider before use if se...
Caffeine Citrate
Pharmaceutical-grade stimulant used primarily for neonatal apnea. Also found in...
Dicaffeine Malate
Often marketed for sustained energy and focus with reduced side effects.
Natural Caffeine (from Coffea/Guarana)
Natural stimulant from coffee beans or guarana. May improve alertness and exerci...
Sustained/Extended-Release Caffeine
Provides prolonged energy and focus; may reduce jitters and crash compared to st...