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Product features.
A good fit for Comparing a measured electrolyte powder for exercise sessions with meaningful sweat losses.
- The checked 8 g serving lists 400 mg sodium, 300 mg potassium and 113 mg magnesium separately.
- The label gives an 8 g powder to 450 ml water mixing ratio, making the intended preparation clear.
- A 264 g tub with 33 servings provides a recognisable pack and serving count for the checked Forest Berries flavour.
- Magnesium contributes to normal muscle function and electrolyte balance; this nutrient role does not establish a need for extra minerals in every workout.
Contains maltodextrin, flavourings and sucralose. Extra electrolytes are not automatically needed for every session, and this product is not a medical rehydration treatment.
Read the ingredient evidence.
Electrolyte powder — Useful in defined exercise-hydration contexts, with needs depending on losses and the overall drinking plan. Benefits, women’s context & cautions
These findings concern the stated ingredient or studied preparation. The finished formula and retail version may differ.
Check the exact version, pack size and seller terms before buying.
The details that matter.
- Checked flavour and pack
- Forest Berries; 264 g; 33 servings
- Labelled preparation
- 8 g powder mixed with 450 ml water
- Sodium
- 400 mg per 8 g serving
- Potassium
- 300 mg per 8 g serving
- Magnesium
- 113 mg per 8 g serving, from magnesium oxide
- Calcium on pictured panel
- 121 mg per 8 g serving
- Match fluid and electrolyte choices to the session, conditions and individual needs; more fluid or minerals is not automatically better.
- Review use with a clinician if you have prescribed fluid or mineral restrictions, kidney disease or relevant medicines.
- The retailer says may contain milk, gluten, eggs, soy, nuts and peanuts. Check the received flavour label and package directions.
- The tub's 33 servings are a quantity calculation, not a 33-day course or a reason to cycle intake.
Cycling & duration.
Ingredient timeframes describe the cited preparation; they do not establish a cycle for every finished formula.
Electrolyte powder
- On/off pattern
- Electrolyte use follows fluid and sweat losses, not a multiweek cycle.
- Duration & evidence
- Use is tied to the particular exercise, heat exposure and recovery period; it need not become an everyday supplement on rest days.
- When to review
- Reassess with changes in session length, environment, sweating, diet or prescribed fluid and mineral limits.
- More sodium, potassium or fluid is not automatically better; avoid replacing exercise losses by an arbitrary calendar rule.
- Sports hydration is different from treatment of persistent vomiting or diarrhoea.
Duration sources: National Athletic Trainers Association: individual fluid replacement. Checked 2026-11-06.
Read the guide to supplement cycling, courses and review periods
How we assessed it.
Exact Amazon UK destination, product photographs and published specifications checked on 6 November 2026. Descriptions distinguish observed label details from retailer claims and conflicts. Gram Health has not physically tested this product.
Retailer source: Amazon UK: Optimum Nutrition Electrolyte Powder, Forest Berries 264 g · Details checked 2026-11-06.
Optimum Nutrition UK: electrolyte powder composition and preparation
NATA: individual fluid replacement for active people
NHS: magnesium, potassium and mineral supplement cautions
These features explain the choice; individual fit, taste and health suitability can differ. Current stock, price and seller terms belong to the specific listing.
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How to read a supplement label
Serving sizes, ingredient forms, units and warnings: a simple way to see what a product actually contains.
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Isotonic Hydration - Blackcurrant 1.23 kg
A good fit for A flavoured powder combining sports fuel with minerals.
A carbohydrate-and-electrolyte drink powder with an identifiable flavour, prepared-drink instructions and a 1.23 kg tub.
Read the ingredient evidence.
Electrolyte powder — Useful in defined exercise-hydration contexts, with needs depending on losses and the overall drinking plan. Benefits, women’s context & cautions
These findings concern the stated ingredient or studied preparation. The finished formula and retail version may differ.
Selected from published product specifications and ingredient information. Read the reason and fit for each pick. How we choose products
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