Endurolytes Fizz are convenient fizzy electrolyte tablets for running, cycling and endurance training. Simply dissolve a tablet in your water bottle for an easy-to-use electrolyte drink. For athletes looking for electrolyte tablets in the UK, Fizz provides a portable alternative to powders and capsules with no added sugar.
Looking for the full range? Browse all electrolyte tablets and hydration products from Hammer Nutrition UK.
New to Hammer? View our Fuelling Guidelines
Learn more: How do electrolyte tablets help hydration?
Electrolyte Tablets for Running, Cycling & Endurance
- 13 tablets per tube
- Provides 6 electrolytes
- No added sugar
- No artificial sweeteners
- No preservatives
- Convenient effervescent tablets for your water bottle
- Suitable for running, cycling, triathlon and endurance training
- Informed Sport certified
Endurolytes Fizz is designed for athletes who want convenient electrolyte support during training and racing.
Simply dissolve a tablet in water to create a refreshing fizzy electrolyte drink that can be used during running, cycling, triathlon, gym sessions and hot-weather training.
Because Fizz provides electrolytes rather than acting as your primary source of exercise calories, you can manage your hydration and fuelling separately.
Pair it with your preferred endurance fuel such as HEED, Perpetuem, Hammer Gel or solid food depending on the duration and demands of your session.
What Are Fizzy Electrolyte Tablets?
Fizzy electrolyte tablets are effervescent tablets designed to dissolve in water, providing a convenient way to consume fluid and electrolytes from the same bottle.
During exercise, electrolytes are lost through sweat. Individual requirements vary according to factors including exercise duration, intensity, temperature and sweat rate.
Endurolytes Fizz provides six electrolytes in an easy-to-carry tablet format, allowing athletes to add electrolyte support to their water without also relying on that drink for exercise calories.
Electrolyte Tablets for Running
For runners, carrying bottles of premixed powder isn't always practical.
Electrolyte tablets for running provide a simple option: drop a Fizz tablet into your bottle or hydration flask and obtain your exercise calories separately through gels or other fuel when required.
Fizz can be particularly useful during:
- Long training runs
- Marathon and ultramarathon training
- Hot-weather running
- High-sweat sessions
- Running events where electrolyte drinks can be refilled along the route
Hydration Tablets for Cycling
Cyclists can easily carry Fizz tubes in a jersey pocket or kit bag and prepare an electrolyte bottle when required.
Using hydration tablets for cycling also allows you to separate what you're drinking from what you're eating.
For example, a rider might use Fizz for electrolyte support while obtaining exercise calories from Hammer Gel, Perpetuem or other endurance fuel.
Fizz vs Sports Drinks: What's the Difference?
An electrolyte tablet and a carbohydrate sports drink don't necessarily perform the same job.
Endurolytes Fizz provides electrolytes without being your primary source of exercise calories.
HEED Sports Drink, by comparison, combines carbohydrates and electrolytes, allowing it to contribute towards both fuelling and hydration during exercise.
Choose based on your overall strategy:
Choose Fizz when:
You want electrolytes in your bottle while obtaining your calories elsewhere.
Choose HEED when:
You want carbohydrates and electrolytes together in your bottle.
For a more detailed explanation, read our Sports Drinks & Electrolytes Guide.
Why Choose Endurolytes Fizz?
- Convenient electrolyte tablets for endurance athletes
- Suitable for running, cycling and triathlon
- Easy to carry and prepare
- Six-electrolyte formula
- No added sugar
- No artificial sweeteners or preservatives
- Allows electrolyte intake to be managed separately from exercise calories
- Easy to pair with your preferred endurance fuel
Fizz, Endurolytes or Endurolytes Extreme?
Hammer offers different electrolyte formats because athlete requirements and preferences vary.
Endurolytes Fizz
Choose Fizz when you want convenient effervescent electrolyte tablets in your water bottle.
Endurolytes Capsules
Choose Endurolytes when you prefer electrolyte capsules and want to drink plain water or another beverage.
Endurolytes Extreme
Consider Endurolytes Extreme when you're specifically looking for a higher-sodium electrolyte option.
Frequently Asked Questions
Are Endurolytes Fizz electrolyte tablets?
Yes. Endurolytes Fizz are effervescent electrolyte tablets that dissolve in water to create an electrolyte drink for training, racing and everyday exercise.
Are Fizz tablets suitable for runners?
Yes. Fizz provides a convenient way for runners to consume fluid and electrolytes from a bottle or hydration flask while managing their exercise calories separately.
Can I use Fizz for cycling?
Yes. Fizz can be dissolved in a cycling bottle and used during training or racing. The tube format also makes additional tablets easy to carry.
Does Endurolytes Fizz contain sugar?
Endurolytes Fizz has no added sugar and isn't designed to provide your primary source of exercise calories.
What's the difference between Fizz and HEED?
Fizz is primarily an electrolyte product. HEED combines carbohydrates and electrolytes, so it can contribute towards both energy and hydration during exercise.
What's the difference between Fizz and Endurolytes capsules?
Both provide electrolyte support but use different formats. Fizz dissolves in your water bottle, while Endurolytes are swallowed as capsules.
When should I use electrolyte tablets?
This depends on factors including exercise duration and intensity, environmental conditions, individual sweat rate and what you're consuming elsewhere. Electrolyte requirements vary considerably between athletes.
Are Fizz tablets suitable for hot-weather training?
Fizz can be used during hot-weather training when fluid and electrolyte requirements may increase. Individual requirements vary according to conditions and sweat rate.
Or try our bundles and save 10% when you mix and match your products
Let customers speak for us
By far the best tasting recovery drink I’ve used in over 25 years. Lovely taste and consistency. It’s my go to protein drink now!
Hammer Nutrition Perpetuem was a key part of my fuelling strategy for the Leeds Ironman last weekend.
It gave me steady, reliable energy throughout the race and, most importantly, sat really well in my stomach.
No heavy feeling, I was able to keep fuelling consistently right throughout my cycling. A great product for long-distance — so glad this was recommended to me during my early training in preparation.
Extremely useful to use whilst cycling, removes the faff of opening gels whilst cycling and the solid bottle makes it easy to get in / out of jersey pockets.
Brilliant product - i use these in all my endurance events - some lasting up to 20 hours. These are great to ensure you get the required electrolytes without over hydrating.
Great product! Very good quality supplement
Great service and the products are amazing, especially for endurance sports. I'm a big fan of the Endrolytes Electrolyte Caps. Their magnesium supplement and vitamin D are also very very good! I would highly recommend.
I’ve used Hammer products for around 6 years now & my favourite by a mile is the hammer Perpetuem, it’s fueled my last 100 mile ultra marathon not to mention multiple long distance triathlon's . It has 180calories per serving and it’s 34g of carbs & 5g of protein seems to work well . I’d strongly recommend for anyone who wants to take on ultra races as this fuel will support you when you need it most .
I started using Hammer Heed and Perpetuem 5 years ago and it's been such a game changer for my. Finding nutrition you can trust is so important for any athlete and I highly recommend Hammer Nutrition for any distance and any sport.
I couldnt race without hammer products. Heed is my favourite, such an amazing product. Paired with the gels it makes a great fueling recipe. Always fast shipping
Wonderful product for general Well being and Recovery. Great quick shipping.
Love all your products. I personally will concentrate on the perpetuum for my long swim(45km) as it feels like a meal every 4mins.
Thank you
great taste! great weight to calorie ratio! thanks
Frequently Asked Questions
How long will my delivery take and how much does it cost?
Orders placed before 2:00 PM (UK time) are dispatched the same working day. Standard delivery to mainland Great Britain takes 2–5 days at a flat rate of £3.50, or free on orders over £10.
Large tubs are automatically upgraded to DPD next-day delivery. Shipping to Northern Ireland, the Channel Islands, and the Scottish Highlands costs £4.50, or free on orders over £80.
Can I change or cancel my order after placing it?
Because we process and dispatch orders quickly, we are usually unable to modify products, delivery methods, or addresses after submission.
To cancel an order, you must contact us on the same calendar day it was placed. If dispatch has already occurred, you can return the unused items within 14 days at your own shipping expense.
What is your returns policy if I change my mind?
You have 14 days from the day after delivery to cancel your order. Items must be unused, in their original packaging, and in resaleable condition. Important Step:
You must email us via the bottom of our Home Page first to obtain a Returns Authorisation Number and a free Royal Mail returns sticker; unauthorised returns cannot be processed.
Note that opened, sealed supplements cannot be returned for hygiene reasons.
What should I do if my order is damaged, faulty, or incorrect?
Check your parcel immediately upon arrival. If there is an issue, notify us within 48 hours of delivery via teh contact us at the bottom of our Home page.
Please include your order number, a description of the issue, and photos of the damaged items and packaging. We will provide a free replacement or full refund.
How long do refunds take to process?
Once your return is received, inspected, and approved, we process refunds back to your original payment method (card, PayPal, or bank transfer).
This typically takes place within 7 working days, and always within a maximum window of 30 days.
Are Hammer Nutrition products safe for drug-tested athletes?
Yes. Key products within our range—including Endurolytes (4ct/120ct), Endurolytes Extreme (3ct/120ct), Endurolytes Extreme Powder, and Endurolytes Fizz - are officially Informed Sport certified.
Additionally, our products are manufactured in strict ISO, GMP-compliant, and SQF Level 3 Certified facilities to ensure the highest standards of food safety and purity.
What do you use to flavour your sports nutrition products?
We use only premium ingredients with zero artificial flavours, artificial sweeteners, or chemical colorants.
Our natural flavours are extracted from real food sources (such as fruits, essential oils, and botanicals) in full compliance with FDA regulations.
They are entirely derived from non-allergenic materials and are formulated for a clean, subtle, non-sweet taste.
What should I do if my order has not arrived?
Estimated transit times are 2–5 days. If your parcel has not arrived within 5 days of placing your order, notify us immediately via our contact us at the bottom of our Home page.
We will launch an investigation with the carrier and provide updates or arrange a replacement where appropriate.
Do you accept backorders for out-of-stock items?
No, we do not accept backorders. If an item is currently unavailable, you can enter your email address in the "email me when back in stock" widget directly on the product page to receive an automated real-time notification the moment inventory is replenished.
Are your supplements suitable for specific dietary restrictions?
Our clean sports nutrition range is formulated to support optimal body function and is completely free from gluten, artificial preservatives, and artificial colorants.
If you have specific medical conditions or severe allergen concerns, we recommend checking the explicit ingredient panels or consulting a healthcare professional prior to consumption.
