Electrolytes Hub – Endurance Hydration & Electrolyte Supplements UK
Electrolytes are the most underestimated variable in endurance performance. Get them wrong and you cramp, fade, and struggle to finish. Get them right and you stay sharp, strong, and in control from start to finish. This hub brings together Hammer Nutrition UK's full range of electrolyte supplements — all containing six different full-spectrum electrolytes — and the science behind using them effectively.
Unlike most sports brands, Hammer Nutrition uses chelated minerals rather than cheap salt-only formulas. That means better absorption, less GI distress, and electrolyte balance that actually mirrors what your body loses during exercise.
Electrolyte Supplements
Endurolytes – Balanced Electrolyte Capsules for Endurance
Endurolytes are Hammer Nutrition's flagship electrolyte capsules — a precisely balanced blend of sodium, potassium, magnesium, calcium, and manganese in chelated form for maximum absorption. Unlike sodium-only tabs, Endurolytes replace the full spectrum of minerals lost through sweat, making them the go-to choice for endurance athletes in the UK who want cramp-free, consistent performance.
Best for: All-day endurance events | Athletes who sweat moderately | Everyday training hydration
Endurolytes Extreme – High-Strength Electrolytes for Heavy Sweaters
When conditions are brutal — extreme heat, high humidity, or multi-hour efforts — standard electrolyte doses aren't enough. Endurolytes Extreme delivers a significantly higher sodium and electrolyte concentration, specifically formulated for heavy sweaters, hot weather racing, and athletes who consistently struggle with cramping. The same chelated mineral quality as Endurolytes, scaled up for when it matters most.
Best for: Hot weather racing | Heavy sweaters | Ultra-distance events | Summer training blocks
Endurolytes Fizz – Effervescent Electrolyte Tablets
Endurolytes Fizz delivers a very similar electrolyte mineral profile to standard Endurolytes in a convenient effervescent tablet — just drop one into your water bottle and go. No measuring, no capsules, no fuss. Ideal for athletes who prefer drinking their electrolytes, or for events where swallowing capsules mid-effort isn't practical. A popular choice for cycling hydration and open-water swimming.
Best for: Cyclists and swimmers | Athletes who prefer drink-format electrolytes | Travel and racing convenience
Endurolytes Extreme Powder – High-Strength Electrolytes in Bulk
All the performance of Endurolytes Extreme in a flexible powder format. Endurolytes Extreme Powder lets you dial in your exact electrolyte dose — ideal for athletes with high sweat rates who need precise control, or for mixing into bottles during long training blocks. The most cost-effective way to maintain electrolyte balance during endurance training.
Best for: High-volume training | Athletes needing custom dosing | Cost-conscious endurance athletes
Shop Endurolytes Extreme Powder →
Which Electrolyte Supplement Is Right for You?
| Product | Format | Strength | Best For |
|---|---|---|---|
| Endurolytes | Capsule | Standard | Most athletes, most conditions |
| Endurolytes Extreme | Capsule | High | Heat, heavy sweaters, ultras |
| Endurolytes Fizz | Effervescent tablet | Standard | Drink-format preference, cycling |
| Extreme Powder | Powder | High | Custom dosing, high volume training |
Electrolyte Guides & Science
Understanding why electrolytes matter is just as important as choosing the right product. These guides cover the science behind endurance hydration — from mineral absorption to the real causes of cramping.
- Electrolytes for Endurance: Why What's in Your Capsule Matters More Than Sodium Quantity – The case for chelated minerals over cheap salt tabs
- The Complete Guide to Electrolytes for Endurance Sports (Part 2) – Deep-dive into electrolyte strategy for long-distance athletes
- Why Chelated Electrolytes Matter: The Hammer Nutrition Difference – How chelation improves absorption and reduces GI distress
- Electrolytes vs Sports Drinks – What's the Difference? – When to use electrolyte supplements vs a full sports drink
Why Hammer Nutrition Electrolytes?
Most electrolyte products on the market are little more than sodium chloride with flavouring. Hammer Nutrition takes a fundamentally different approach: every Endurolytes product uses chelated minerals — minerals bonded to amino acids for superior bioavailability and gentler absorption. The result is an electrolyte supplement that works with your body's physiology, not against it.
No artificial colours. No excessive sodium. No proprietary blends. Just the right minerals, in the right ratios, in the right form.
Browse all Hammer Nutrition products →
Frequently Asked Questions – Electrolyte Supplements for Endurance
What are electrolytes and why do endurance athletes need them?
Electrolytes are electrically charged minerals — including sodium, potassium, magnesium, calcium, chloride, and manganese — that regulate fluid balance, muscle contractions, and nerve signalling. During endurance exercise, you lose these minerals through sweat. If you don't replace them, performance drops, cramping sets in, and in severe cases hyponatraemia (dangerously low sodium) can occur. Electrolyte supplements replenish what you lose so you can maintain output across long efforts.
What is the difference between Endurolytes and Endurolytes Extreme?
Endurolytes is the standard-strength formula, suited to most athletes in moderate conditions. Endurolytes Extreme contains a significantly higher sodium and electrolyte concentration, designed for heavy sweaters, hot weather racing, and ultra-distance events where standard doses aren't sufficient. If you regularly cramp or race in heat, Extreme is the better starting point.
Are chelated electrolytes better than regular electrolyte tablets?
Yes — chelated minerals are bonded to amino acids, which improves bioavailability and reduces GI distress compared to inorganic mineral salts. Most budget electrolyte tabs use cheap sodium chloride as the primary ingredient. Hammer Nutrition's Endurolytes range uses chelated forms of all six key electrolytes, meaning more of what you take actually reaches your cells.
How many Endurolytes should I take per hour?
Dosing depends on your sweat rate, conditions, and body weight. A general starting point is 1–3 Endurolytes capsules per hour during moderate exercise. For Endurolytes Extreme, take 1–2 capsules per hour, adjusting based on heat, intensity, and sweat rate — always start conservatively. Our electrolyte dosing guide covers this in detail.
Can I use Endurolytes Fizz instead of capsules?
Yes — Endurolytes Fizz delivers a very similar electrolyte mineral profile to standard Endurolytes in effervescent tablet form, though the formulas are not identical. Fizz uses different mineral forms to support its effervescent properties and contains slightly more sodium and potassium per equivalent serving. It's ideal if you prefer drinking your electrolytes, find capsules impractical mid-race, or are cycling and want everything in your bottle — and can generally be dosed in a similar way to capsules.
Are Hammer Nutrition electrolytes suitable for running, cycling, and triathlon?
Yes — the Endurolytes range is used across all endurance disciplines including marathon running, road and mountain cycling, triathlon, open-water swimming, and ultra-distance events. The capsule format works well for running and triathlon; Endurolytes Fizz is particularly popular with cyclists who prefer bottle-based hydration.
Do electrolyte supplements contain sugar or artificial additives?
No. Hammer Nutrition's Endurolytes products contain no added sugars, no artificial colours, and no proprietary blends. They are designed to be used alongside your energy source (gel, drink, or bar) rather than as a combined sugar-and-electrolyte product — giving you independent control over your fuelling and hydration strategy.