The other way to fuel what moves you
Built for training, competition and demanding days.
HYROX
Great North Run
London Marathon
Tough Mudder
Spartan DEKA
RideLondon
Other goals, other levels, other limits. This is other fuel.
Energy for other heights
Other Energy Hydrate
150mg Natural Caffeine
Hydration
Energy
Focus
800mg Electrolytes
0g Sugar
Built For More
Our hydration stack is precisely dosed to replace key electrolytes lost through sweat, while natural caffeine and L-theanine work together in a science-backed formula to support smooth, focused energy without the jitters or crash.
Combined to keep you hydrated, focused and switched on through training, competition and demanding days.
The Energy Matrix
A science-backed combination of caffeine and L-theanine formulated for energy and sustained focus. Human studies have found improvements in aspects of attention and cognitive performance when the two are combined.
Caffeine from coffee bean extract and L-theanine derived from green tea give the formula a naturally sourced foundation for focused energy.
Science-Led Hydration
Sweating causes you to lose water and electrolytes. Replacing them helps restore fluid balance and supports normal muscle function. Other Fuel delivers a science-led dose of electrolytes to help replace what you lose during exercise.
The Formula
Sodium
500mg
Sodium is the primary electrolyte lost through sweat and plays a central role in maintaining fluid and electrolyte balance.
Potassium
250mg
Potassium Chloride works alongside sodium to help maintain fluid balance, with an important role in normal muscle function and the nervous system.
Magnesium
50mg
Magnesium Citrate contributes to the reduction of tiredness and fatigue, normal energy-yielding metabolism and electrolyte balance.
Caffeine
150mg
Caffeine is a natural stimulant that increases alertness and energy by blocking the brain chemicals that make you feel tired.
L-Theanine
200mg
An amino acid found in green tea, L-Theanine supports calm, focused attention and helps smooth the stimulating effects of caffeine.
Fuelled by science
Science-led products built to get the most out of training, demanding days and competition. Clear labels, purposeful ingredients and natural flavours.
FAQs
Who is Other Fuel for?
For people who care about what they consume. Whether you’re training, competing, working hard or simply facing a demanding day, Other Fuel is for those who want products they can trust - with clean ingredients, studied compounds and meaningful doses. Made in the UK, with no artificial flavours, sweeteners or colours.
Why do I need electrolytes?
Sweating causes you to lose water and electrolytes. Replacing them helps restore fluid balance and supports normal muscle function. Other Fuel contains a science-led dose of electrolytes to help replace what you lose during exercise and demanding days.
Why caffeine and L-theanine?
Caffeine delivers energy, alertness and concentration. L-theanine complements caffeine, helping to create a more focused, balanced experience with less of the jittery feeling associated with caffeine alone.
How much caffeine?
Each serving contains 150mg of caffeine - about the same as a strong coffee or a double espresso. Paired with L-theanine, the caffeine is balanced out to deliver smoother, more focused energy without the jitters or crash associated with caffeine alone.
When should I take Flow State?
Before, during or after training, or whenever you need hydration, energy and focus. Designed to fit easily into your daily routine. As it contains caffeine, we recommend limiting consumption in the evening.