Caffeine Anhydrous
Known For -
Energy, Focus, Alertness
Power Rating*
What It Is:
A purified, fast-acting form of caffeine — the same stimulant in coffee, just stronger and quicker. It blocks adenosine receptors in the brain, reducing tiredness and increasing focus, alertness, and reaction time.
What It’s Used For:
Instant energy and motivation
Improved focus and reaction time
Enhanced endurance and strength output
Found in almost every pre-workout
Typical Dose:
100–300 mg pre-workout, depending on tolerance
Daily upper limit: around 400 mg for most adults
Side Effects:
Jitters, anxiety, or heart palpitations (especially in high doses)
Can disturb sleep if taken late in the day
Habit-forming — tolerance builds quickly
Why It’s Rated 4.5/5:
Caffeine works. Every time. Boosts energy, strength, endurance, and even fat burning slightly. It loses a point only because of side effects and diminishing returns with daily overuse.