Racing across the Sahara, David Hellard dropped his caffeine pill in the sand mid-race. Somewhere between the dunes he thought: there has to be a better way to take caffeine on the move.

That moment became Caffeine Bullet, a caffeine chew you can eat on the run, with no water and no faff. David is an ultra-running champion and a commentator on the Golden Trail World Series for Eurosport, and Performance Bullet is backed by Dragons' Den investors Steven Bartlett and Peter Jones.

Caffeine Bullet: for physical performance

Fast-acting caffeine chews for runners, cyclists, triathletes and the gym. The big difference: the caffeine is absorbed while you chew, so it kicks in faster.

Mintense Mint: 100mg caffeine per chew. ChocoLIT Orange: 85mg per chew. Caffeine contributes to an increase in endurance performance and endurance capacity, and to a reduction in rated perceived exertion (beneficial effect with 3mg/kg body weight about an hour before exercise).

Best for: race day, long runs and rides, trail and ultra, stocking fillers for active friends.

On sale in: UK, US, Canada and Australia (Amazon).

Ginger Roars: a little lift

A milder, plant-based chew for a gentle lift over an hour or two. 33mg caffeine per chew, made from raw ginger, virgin coconut oil, cassava root and cane sugar, with a natural fiery kick. A favourite with ultra runners, who can top up little and often through a long day. "A little lift to a mighty ROAR!"

Best for: ultra and trail runners, hikers and walkers, foodies and tea lovers, stocking fillers.

On sale in: UK and US (Amazon). Not available in Canada or Australia.