Supplement • Muscle, performance & recovery
Caffeine
What it is, the potential benefits being studied, and what the evidence supports right now.
Promising human research•Status depends on the exact product
01 • Start here
Potential benefits being studied.
Alertness and endurance or high-intensity performance.
- Strength & performance
02 • Why it stands out
The simple explanation.
Caffeine is getting attention for alertness and endurance or high-intensity performance.
03 • Research highlight
Why researchers are interested.
Human research makes alertness and endurance or high-intensity performance the clearest reason Caffeine stands out.
Evidence detailsStudy limits, status, and safety context
Study summary: Controlled evidence supports improved alertness and performance in many, but not all, exercise settings.
What to keep in mind: Sleep disruption, anxiety, heart-rate effects, tolerance, medication interactions, and total daily intake matter.
Potential benefits describe research questions, not a promise that a product will produce the same result in a person.