When a workout starts without fire in the eyes, results suffer. Pre-workout supplements provide a direct boost to the central nervous system (caffeine, tyrosine), circulatory vasodilation (citrulline, arginine), and muscle endurance (beta-alanine). For work and study — stimulant-free nootropics.## How pre-workout formulas work
Energy in workouts comes from 3 systems:
1. **Neurostimulation** — caffeine blocks adenosine receptors → alertness
2. **NO production** — citrulline and arginine → vasodilation → more O₂ and nutrients in the muscle
3. **pH buffering** — beta-alanine → carnosine in the muscle → delays lactic acid by 10–15 seconds
## Scientifically backed dosages
| Active ingredient | Dose | Effect |
|---|---|---|
| Caffeine | 3–6 mg/kg | +5–10% strength |
| Citrulline malate | 6–8 g | +12% repetition volume |
| Beta-alanine | 3.2–5 g | +2–6% muscle endurance |
| Creatine | 3–5 g | +10–15% explosive strength |
| Tyrosine | 1–2 g | +focus under stress |
## Stimulant-free?
Yes — stim-free formulas based on citrulline + GlycerPump + beta-alanine provide pump and endurance without caffeine. Ideal for evening workouts or people with caffeine tolerance.