Optimum Nutrition Electrolyte Powder - 264g
Optimum Nutrition Electrolyte Powder - 264g
- For intense training sessions
- Delivers key electrolytes—400 mg sodium, 113 mg magnesium, and 300 mg potassium per serving—to support muscle function after heavy sweating.
Product Overview
What are Electrolytes?
Electrolytes are essential minerals—such as sodium, potassium, and magnesium—that support the body, especially during exercise. They help support muscle function and replenish electrolytes lost through sweat during intense physical activity.
Performance Benefits
This scientifically informed formula delivers 400 mg of sodium, 300 mg of potassium, and 113 mg of magnesium per serving—designed to replenish essential electrolytes lost during sweating and maintain normal muscle* function during demanding workouts.
When to Use This Product:
Perfect for use before, during, or after intense training sessions, long endurance workouts, or hot weather activities. Mix one serving into water for a fast-dissolving, great-tasting electrolyte solution in either Lemon or Berries flavor.
Why Choose This Product?
With over 35 years of sports nutrition expertise and trusted in more than 90 countries, Optimum Nutrition delivers premium quality you can count on. Our electrolyte powders are free from unnecessary fillers, easy to mix, and developed under the highest production standards. Whether you're pushing your limits in the gym or recovering from a long session, this replenishing formula helps unlock your body’s full potential.
* Magnesium supports electrolyte balance and helps reduce fatigue.
*Potassium contributes to normal muscle function.
*Sodium is the most important electrolyte.
Delivery Terms & Conditions / Options & Info
Operated by Nutrition & Internet Supplements Limited (trading as NI Supplements). Last updated: 13 October 2025
Cut-off & processing: Orders placed before 1 p.m. (UK time) are processed the same working day. Courier networks operate Monday–Saturday (excluding Bank Holidays). Delivery times below exclude Sundays unless stated.
UK Mainland (excluding Highlands & Islands)
Orders under £50
| Service | Price | Speed | Notes |
|---|---|---|---|
| 1–2 Day Delivery (No Signature Required) | £2.95 | Fully tracked; 91% delivered next day if ordered before 1 p.m. (excl. Sundays) | Photographic & GPS delivery proof confirms delivery. Non-delivery claims are investigated; parcels confirmed delivered by Royal Mail are not eligible for replacement. |
| 1–2 Day Delivery (Signature Required) | £3.35 | Fully tracked; 91% delivered next day if ordered before 1 p.m. (excl. Sundays) | Signature required at delivery. |
FREE delivery on orders over £50
| Service | Price | Speed | Notes |
|---|---|---|---|
| 4–5 Day Delivery (No Signature Required) | Free | Fully tracked (excl. Sundays) | Terms for “No Signature Required” (photo/GPS proof) apply. |
| 4–5 Day Delivery (Signature Required) | Free | Fully tracked (excl. Sundays) | Signature required. |
Reminder: Selecting “No Signature Required” means your parcel may be left at your address or a designated safe location without a signature, with photo/GPS proof used to confirm delivery.
UK Mainland (excluding Highlands & Islands)
Orders under £50
| Service | Price | Speed | Notes |
|---|---|---|---|
| 1–2 Day (No Signature) | £2.95 | Tracked; 91% next-day before 1 p.m. | Photo/GPS proof confirms delivery; confirmed deliveries not eligible for replacement. |
| 1–2 Day (Signature) | £3.35 | Tracked; 91% next-day before 1 p.m. | Signature required. |
FREE on £50+
| Service | Price | Speed | Notes |
|---|---|---|---|
| 4–5 Day (No Signature) | Free | Tracked | Photo/GPS proof terms apply. |
| 4–5 Day (Signature) | Free | Tracked | Signature required. |
Northern Ireland
| Service | Price | Speed | Notes |
|---|---|---|---|
| Free on £50+ | Free | 2–3 working days | Tracked |
| Express (No Signature) | £1.99 | Next-day before 1 p.m. | Photo/GPS proof |
| Express (Signature) | £2.49 | Next-day before 1 p.m. | Signature required |
Ireland
| Service | Price | Speed | Notes |
|---|---|---|---|
| Free on £70+ | Free | 2–4 working days | Tracked; order before 1 p.m. |
| Reduced Rate on £50+ | £2.99 | 1–2 working days | Parcelforce/GLS; tracked |
| Express under £50 | £4.99 | Next-day before 1 p.m. | Tracked; Mon–Fri dispatch |
| Standard under £50 | £4.99 | 1–2 working days | Parcelforce/GLS; tracked |
EU & International
Rates shown at checkout.
Customs: Customs delays are outside our delivery times and not our responsibility; we cannot contact customs to expedite.
General Delivery Terms
- No Signature Required: By selecting this option you agree your parcel may be left at the delivery address or a designated safe location without a signature. Photographic and GPS proof from the courier confirms delivery. Claims of non-delivery will be investigated, but parcels confirmed delivered are not eligible for replacement.
- Signature Required: A signature will be obtained at delivery; choose this for added security.
- Same-day dispatch (express): Guaranteed for orders placed before 1 p.m. Courier delays can occasionally occur.
- Working days: Processing Mon–Sat (excl. Bank Holidays). Deliveries do not include Sundays unless stated by the service.
- Cut-off: Orders after 1 p.m. are processed the next working day.
Failed Delivery & Returns to Sender
If an order is returned due to customer error (e.g., failure to take delivery or arrange collection/redelivery), a re-shipping fee applies. Alternatively, a refund of the item price minus our shipping costs can be provided. If the error is ours, we will re-ship at our expense.
Questions about shipping?
For queries on shipping times and order status please email hello@nisupplements.com.
Nutrition & Internet Supplements Limited (trading as NI Supplements)Unit 5, Graham Industrial Park, Dargan Crescent, Belfast, Co Antrim, BT3 9LP, United Kingdom
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