Myprotein Command Energy Drinks

£11.89 (pack of 6), myprotein.com

This range from Myprotein was actually designed for the gaming market, to reduce mental fatigue, while boosting alertness and concentration. But we reckon they’re ideal before the gym, too. Each can packs a considerable 180mg of caffeine, plus added zinc, vitamin B6, B12 and vitamin A. They also contain nootropics such as lion’s mane mushroom powder, known for its ability to support cognitive function and mental health.