Prices checked 17 Oct 2026 at 6:32am
Most have 150 to 300mg per serving, which is about two cups of coffee at the top end. Research uses around 3mg per kg of body weight, so 200 to 300mg suits most adults. Count any coffee you drink as well.
Citrulline (6 to 8g) and beta-alanine (3.2g) have research behind them at those doses. Many pre-workouts include them at much lower amounts, so check the label for the number, not just the name.
Caffeine is the main thing to watch. About 400mg a day from all sources is the usual limit for adults, and less if you are pregnant. Avoid it in the evening, since caffeine stays in your body for hours.
We divide each price by the servings in the tub, so big and small tubs compare fairly. You can sort by price, servings or size instead.
↓ 14% means 14% below the usual price: the typical price over the last 30 days. We only show 3% or more.
Checked every morning across UK retailers. Prices include VAT and can change after we check them.