Electrolyte
Sweat-Replacement Mix
Optimum Nutrition Electrolyte 264g - 264g / Forest Berries
Optimum Nutrition

Optimum Nutrition Electrolyte 264g

★★★★★
| 0 reviews |  33 Servings
£9.99 £12.99 £0.30/serving
400mg Sodium Built for heavy sweaters - cyclists, runners and lifters who train hot and lose fluid fast.
Magnesium + Calcium Key minerals layered in to support muscle function and ease post-training tiredness.
33 Servings, No Sugar Low-calorie mix for the bidon, gym bottle or hot-weather walk - 33 sessions per tub.
Forest Berries
Lemon
Standard delivery
Next day (£5.99)
17,000+ Reviews
14-Day Returns
Est. 2005
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Food supplements should not be used as a substitute for a varied and balanced diet and healthy lifestyle. If you are pregnant, breastfeeding, taking medication, or under medical supervision, consult your doctor before use. Do not exceed the recommended daily intake. Store out of reach of children.

Forest Berries
Lemon

Optimum Nutrition Electrolyte - hydration powder for training

Hard sessions cost minerals, not just water. Sweat drains sodium, potassium, calcium and magnesium - and topping back up with plain water alone leaves the body chasing balance. Optimum Nutrition Electrolyte is a low-calorie hydration mix built specifically to replace what training takes out.

Each serving delivers 400mg sodium, 300mg potassium, 121mg calcium and 113mg magnesium in a sugar-free formula - the four minerals lost in sweat, supplied in the ratios the body actually needs. Magnesium contributes to normal muscle function and helps reduce tiredness and fatigue; calcium also contributes to normal muscle function.

Built for endurance athletes, lifters, runners and anyone training in warm conditions. Useful before, during and after exercise to replace sweat losses, on hot days when fluid demand climbs, across long travel days where dehydration creeps in, and during heavy training weeks when minerals deplete faster than diet replaces them.

The 264g tub covers 33 servings - roughly a month of regular training use. From the brand serious athletes have trusted since 1986. The sweat-replacement mix that earns its place in the kit bag.

Key Benefits

Three Key Electrolytes

Sodium (400mg), Potassium (300mg), and Magnesium (113mg) per serving replace the primary minerals lost through sweat, supporting hydration, muscle function, and cramp prevention during exercise.

Low Calorie Hydration

Electrolyte supports fluid balance and mineral replacement without the high sugar and calorie content of mainstream sports drinks, making it suitable for calorie-conscious athletes.

Normal Muscle Function

Magnesium and potassium contribute to normal muscle function including contraction and relaxation, helping maintain performance and reduce the risk of cramps during long training sessions.

33 Servings Per Tub

Over a month of daily training hydration from a single tub - significantly more economical than bottled sports drinks and easier to use than single-serve electrolyte sachets.

Frequently Asked Questions

What minerals are in Optimum Nutrition Electrolyte per serving?

Each 8g scoop of Optimum Nutrition Electrolyte delivers 400mg sodium, 300mg potassium, 121mg calcium and 113mg magnesium. Magnesium contributes to normal muscle function and helps reduce tiredness and fatigue. Calcium also contributes to normal muscle function, making the mix useful around training.

When should I drink Optimum Nutrition Electrolyte?

Drink Optimum Nutrition Electrolyte before, during or after training to replace minerals lost through sweat. It is also useful on hot days, long travel days or rest days when fluid intake is high. There are no stimulants, so timing is flexible - most people benefit most from a serving around their main training session.

How does Optimum Nutrition Electrolyte compare to a standard sports drink?

Optimum Nutrition Electrolyte focuses on mineral delivery rather than sugar-led energy. A typical sports drink contains 20-30g sugar per serving with lower electrolyte doses. ON Electrolyte gives 400mg sodium, 300mg potassium and 113mg magnesium per serving with minimal calories, which suits anyone who wants targeted hydration without the sugar load.