Pre-Workout

What's Actually in a Pre-Workout

Most pre-workout formulas are four or five ingredients that do something and a long tail of ingredients at doses too small to matter.

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Caffeine, creatine, beta-alanine and citrulline carry the category. Check them against effective doses and treat the rest of the panel as decoration.

The short list of things that carry the category

Caffeine is the ingredient you feel, and the one with the most direct evidence for performance. The studied range is about 3–6 mg per kilogram of bodyweight — for an 80 kg lifter, roughly 240–480 mg, though that upper end is far more than most people want or need habitually.

Beta-alanine raises muscle carnosine over weeks of daily dosing. It is not an acute ingredient, which is the single most misunderstood thing about it. See the beta-alanine guide — the tingle you feel is not the mechanism working.

L-citrulline is a nitric-oxide precursor with better bioavailability than arginine. Effective doses are 6–8 g of citrulline, or about 8 g of citrulline malate, which at the common 2:1 ratio supplies roughly 5.3 g of actual citrulline. Evidence here is real but modest — do not expect the effect size of caffeine.

Creatine is worth having in your routine, but it does not need to be in your pre-workout specifically, because it works through tissue saturation rather than timing.

The long tail, and why it is there

Formulas routinely list a dozen or more additional ingredients: amino acids, adaptogens, nootropics, fruit extracts, obscure botanicals. Some of these have genuine research behind them at particular doses. Almost none are present at those doses.

The commercial logic is label appeal. A long ingredient list reads as comprehensive and supports a premium price, and milligram quantities of fifteen extras cost very little. This is sometimes called fairy dusting, and once you have seen it you will see it on most panels in the category.

A practical filter: find the four ingredients above, check them against the doses in the box at the top of this page, and ignore the rest of the panel when comparing two products. If the four are underdosed, a longer list does not compensate.

Stimulant totals are easy to lose track of

Pre-workout caffeine stacks with coffee, tea, energy drinks and any fat-burner in the same routine. Panels list caffeine anhydrous separately from sources like green tea extract or guarana, so a formula can carry meaningfully more total caffeine than the headline number suggests.

Caffeine's half-life is around five hours but varies substantially between people, largely with CYP1A2 activity. A late-afternoon session can cost you sleep even when you do not feel stimulated at bedtime — and sleep is doing more for your training than the pre-workout is.

Reading the panel in thirty seconds

Look for per-ingredient doses in milligrams or grams beside each name. If instead you find a named blend with one total weight for the group, the formula is unassessable by design, and the order of ingredients tells you only the ranking, not the amounts.

Then check serving size against servings per container. Two scoops per serving is common, and it halves the advertised servings in the tub while doubling the per-serving cost you were comparing against.