Buying guide · 4 min read
Pre-workout: do you need it, and how much caffeine is too much?
Most pre-workouts are caffeine plus a few extras. Here's who they actually help, how to dose them, and when to skip them.
What's actually in the tub
Strip away the label art and most pre-workouts are caffeine with a few supporting ingredients: citrulline for the pump, beta-alanine for the tingle and short-burst endurance, sometimes creatine or tyrosine. The caffeine is doing most of the work you feel.
How much caffeine is too much
For healthy adults, up to about 400 mg of caffeine a day is generally considered safe, and around 200 mg in one go. A single scoop of many pre-workouts holds 150–300 mg, so a scoop plus two coffees can put you over the line without noticing.
Start with half a scoop. If you train after 6 pm, think twice: caffeine stays in your system for hours and can wreck the sleep you need to recover.
Who it helps
Early-morning lifters who feel flat, people training after a long workday, and anyone chasing a heavy session where focus matters. If you already train well on a coffee, a pre-workout mostly adds cost.
Who should skip it
Teenagers, anyone sensitive to caffeine, and anyone with blood-pressure or heart concerns — talk to your doctor first. The tingling from beta-alanine is harmless, but if the jitters or the crash bother you, a stim-free formula or plain coffee is the honest answer.
Our counter advice
Sleep, food and a sensible programme beat any scoop. If you still want one, ask us — we'll show you the caffeine per serving on each label before you buy.
