Pre-workout boosters promise more energy, focus, and the best pump of your life. The reality: some ingredients have strong evidence, others are pure marketing. Here's what actually works – with specific dosages.
The Top 3: Ingredients with Strong Evidence
### ☕ Caffeine – The King
Caffeine is the most researched performance-enhancing substance period. It stimulates the central nervous system, increases alertness, and can even reduce pain perception during training.
Dosage: 3–6 mg per kg body weight, about 60 minutes before training. For an 80 kg person, that's 240–480 mg. Start at the lower end if you're caffeine-sensitive.
Effects: More strength, more endurance, higher speed. Meta-analyses confirm: caffeine improves muscular endurance, strength performance, and sprint performance. Even low doses under 3 mg/kg already show measurable effects on muscle strength.
Caution: Above 6 mg/kg, the risk of anxiety and rapid heartbeat increases. And: if you train in the evening, reconsider caffeine intake – sleep is more important than any booster.
### 💊 L-Citrulline – The Pump Provider
L-citrulline is converted to arginine in your body, which boosts nitric oxide (NO) production. The result: widened blood vessels, better blood flow, and the typical "pump" effect during training. L-citrulline is more effective than taking arginine directly, as it's better absorbed in the gut.
Dosage: 6–8g citrulline malate or about 3–5g pure L-citrulline, approximately 60 minutes before training.
Effects: Improved pump, potentially more reps on high-volume sets, better nutrient delivery to muscles through increased blood flow.
### 🧪 Beta-Alanine – The Endurance Buffer
Beta-alanine increases carnosine levels in your muscles. Carnosine acts as a buffer against lactic acid buildup (the "burning" during high-rep sets) and can thus delay fatigue.
Dosage: 3.2–6.4g per day, split into smaller doses (1.5–2g per intake) to reduce the typical tingling (paresthesia). It must be taken daily for at least 2–4 weeks – only then are carnosine stores fully saturated.
Important: Beta-alanine shows its strengths primarily for efforts lasting 1–10 minutes – meaning endurance-heavy sets, HIIT, or team sports. For pure maximum strength training (heavy, few reps), the benefit is limited. It doesn't reliably improve maximal strength.
What You Find in Many Boosters – But Don't Need
• Proprietary Blends – When the label says "Energy Matrix: 5g" without listing individual amounts, you don't know if effective doses are included. Stay away!
• Taurine – No convincing evidence for performance enhancement
• AAKG (Arginine) – Citrulline is demonstrably more effective for NO production
• Excessive stimulant mixtures – Caffeine is enough. More isn't better.
The Natural Alternative
You don't need an expensive booster. The most effective, cheapest pre-workout combo:
• Strong black coffee (200–300 mg caffeine) – 60 min before training
• 200ml beetroot juice – for natural NO and better circulation
• A banana – quick energy for glycogen stores
Timing: When Do You Take What?
• 60 min before: Caffeine (coffee or pill)
• 45–60 min before: L-citrulline
• 30 min before: Light snack (banana, rice cake)
• Daily (regardless of training): Beta-alanine, creatine
Conclusion
An effective pre-workout needs 2–3 ingredients max: caffeine as a proven performance booster, L-citrulline for the pump, and optionally beta-alanine for endurance-heavy efforts. Everything else is filler. Look for transparent labels with individually listed dosages – and save your money on overpriced "hardcore boosters" with 20+ ingredients.