High Stim Pre-Workout
High-caffeine pre-workouts for experienced users, with the caffeine per scoop on every page.
Frequently asked questions
How much caffeine is in a high-stim pre-workout?
It varies. Menace V2 has 200 mg a scoop and 400 mg in two. CBUM Essential Charged has 350 mg in one scoop. Check the label before you buy.
Who should avoid high-stim pre-workouts?
Children, pregnant or breastfeeding women and anyone sensitive to caffeine. If you have a medical condition or take medication, ask your GP first.
Can I take a high-stim pre-workout in the evening?
Avoid it if you can. RAW Nutrition advises taking Essential Charged at least six hours before bed. For evening sessions, choose a stim-free formula.
High-stim pre-workout
High-stim pre-workouts carry more caffeine per serving than standard formulas, often 300 mg or more in a full serving. They are for experienced users who already know how they handle caffeine.
How to choose
Read the caffeine per scoop, not per tub. Naughty Boy Menace V2 gives 200 mg of caffeine a scoop or 400 mg in two, with 6 g of citrulline malate and 3.2 g of beta-alanine in the full dose. RAW Nutrition CBUM Essential Charged has 350 mg of caffeine in one scoop, with 6 g of L-citrulline, 3.2 g of beta-alanine and 2 g of L-tyrosine.
Start with half a scoop to check your tolerance, take it 20 to 30 minutes before training, and leave at least six hours before bed. Never go over the daily limit on the label.
Count all your caffeine
The European Food Safety Authority considers up to 400 mg a day from all sources safe for most healthy adults, and up to 200 mg in one go. A full high-stim serving can reach that on its own, so skip coffee and energy drinks that day. High-caffeine products are not recommended for children or pregnant or breastfeeding women.
Other options
Want a lighter dose? Browse all pre-workouts or go stim-free with a pump formula. For long or hot sessions, add an electrolyte drink.
















