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Proper hydration can make or break a long run. While most runners know they need to drink, choosing the right hydration product among dozens of options is overwhelming. Electrolyte tablets, drink mixes, isotonic powders, hydrogel technology — the market has exploded with options in recent years (World Athletics).
In 2026, hydration science has advanced significantly. Brands like Maurten have introduced hydrogel technology that allows higher carbohydrate concentrations without stomach distress, while others focus on clean formulas with zero sugar and maximum electrolyte replenishment. We have analyzed the 10 best hydration drinks for runners to help you choose the right one for your needs.
Contents
Why hydration matters for runners
Three key factors determine how well a hydration drink works for running:
- Electrolytes: Sodium is the most critical electrolyte lost through sweat. A good running drink should contain 300-700mg of sodium per liter. Potassium, magnesium and calcium also play important roles in muscle function and preventing cramps.
- Carbohydrates: For runs over 90 minutes, carbs in your drink provide fuel alongside hydration. The optimal concentration is 6-8% (60-80g per liter) for isotonic drinks. Too much causes stomach problems; too little and you miss the fueling benefit.
- Osmolality: This measures how concentrated the drink is compared to your blood. Isotonic (same as blood) and hypotonic (lower than blood) drinks are absorbed fastest. Hypertonic drinks sit in the stomach longer and can cause GI distress during high-intensity running.
The 10 best hydration drinks for running
1. Maurten Drink Mix 320 — Most innovative (hydrogel)
Best for: marathon, ultra, races over 2 hours, sensitive stomachs
- ✓ Hydrogel technology encapsulates carbs for smoother absorption
- ✓ 80g carbs per serving without stomach distress
- ✓ Used by elite marathoners and world record holders
- ✗ Expensive compared to alternatives
- ✗ Neutral taste that some find unpleasant
- ✗ Relatively low sodium for a sports drink
Maurten changed the game when they introduced hydrogel technology. The Drink Mix 320 uses a biopolymer matrix that turns into a gel in the stomach, encapsulating 80 grams of carbohydrates (maltodextrin + fructose) and allowing them to pass through the stomach faster without the osmotic stress that high-carb drinks normally cause.
This is the drink that Eliud Kipchoge and countless Olympic marathoners trust. The 320 version is designed for high-intensity, long-duration efforts where you need maximum fueling. The downside is the price and the deliberately neutral taste — Maurten avoids artificial flavors and sweeteners entirely. If you race marathons seriously, this is the gold standard.
2. Maurten Drink Mix 160 — Best for training
Best for: daily training, tempo runs, half marathon, moderate-intensity sessions
- ✓ Same hydrogel technology as the 320
- ✓ 40g carbs per serving — perfect for training
- ✓ Lighter on the stomach than the 320
- ✗ Still expensive for everyday training
- ✗ Neutral flavor not for everyone
- ✗ Not enough carbs for marathon racing
The Drink Mix 160 is the everyday training version of Maurten. With 40 grams of carbohydrates per serving (half the 320), it provides enough fuel for training runs and moderate-intensity sessions without being overkill. The hydrogel technology works the same way, meaning zero stomach issues (ACSM).
This is the version we recommend for most runners as their daily training drink for long runs of 60-90 minutes. Use the 160 in training and save the 320 for race day. The consistency between the two products means your stomach is already adapted to Maurten when it matters most.
3. SiS Hydro Tablets — Best effervescent tablets
Best for: everyday hydration, hot weather running, calorie-conscious runners
- ✓ Zero calories, zero sugar
- ✓ Full electrolyte profile (Na, K, Mg, Ca)
- ✓ Convenient tablet format, easy to carry
- ✗ No carbohydrates for fueling
- ✗ Fizzy texture can cause bloating
- ✗ Contains artificial sweeteners
Science in Sport (SiS) is one of the most respected names in endurance nutrition. Their Hydro Tablets offer pure electrolyte replacement with zero calories — just drop a tablet in your bottle and you have a refreshing, electrolyte-rich drink in seconds. The effervescent format dissolves quickly and provides sodium, potassium, magnesium and calcium.
These are ideal for runners who want electrolyte replacement without the calories, or who prefer to separate their hydration from their fueling strategy (using gels for carbs and tablets for hydration). Popular for hot weather running where you need to replace electrolytes but not necessarily more calories. The convenience factor is unbeatable: a tube of 20 tablets fits in any pocket.
4. Nuun Sport — Most convenient
Best for: daily hydration, short to medium runs, flavor variety lovers
- ✓ Excellent range of flavors (10+ options)
- ✓ Clean ingredients, low sugar
- ✓ Very portable and easy to use
- ✗ Lower sodium than some competitors
- ✗ Not suitable as sole fuel for long efforts
- ✗ Effervescent format needs time to dissolve
Nuun has built a cult following among runners for good reason. Their Sport tablets deliver a clean, lightly-flavored electrolyte drink with minimal calories. Drop a tablet in 500ml of water, wait for it to dissolve, and you have a perfectly balanced hydration drink. The flavor range is among the best on the market, from citrus fruit to tropical to berry.
Nuun Sport is designed for everyday use — before, during and after runs of any distance. For marathon or ultra runners, you will need a separate carbohydrate source since each tablet only contains 1g of sugar. But for daily hydration, easy runs and as a pre-run drink, Nuun is hard to beat. The compact tube format makes it perfect for travel too.
5. PowerBar 5 Electrolytes — Best with caffeine
Best for: morning runs, long races, runners who want an extra caffeine boost
- ✓ 75mg caffeine per tablet in caffeinated version
- ✓ 5 key electrolytes in one tablet
- ✓ Zero calories, zero sugar
- ✗ Caffeine version not suitable for evening runs
- ✗ Limited flavor options
- ✗ No carbohydrates for fueling
PowerBar has been in the sports nutrition game for decades, and their 5 Electrolytes tablets are one of the most complete zero-calorie options available. The standout feature is the caffeinated version, which packs 75mg of caffeine per tablet — roughly equivalent to a strong espresso. The combination of caffeine plus a full 5-electrolyte profile makes it a potent pre-race or mid-race drink.
Caffeine is scientifically proven to improve endurance performance by 2-4%, and getting it through your hydration is more convenient than carrying caffeine gels. The non-caffeinated version is equally solid for everyday training. If you are an early morning runner who skips coffee before heading out, a PowerBar caffeinated tablet in your bottle is a game changer.
6. Tailwind Nutrition — Most complete (carbs + electrolytes)
Best for: ultra marathons, all-in-one simplicity, runners who hate gels
- ✓ All-in-one: calories, carbs and electrolytes
- ✓ 200 calories per serving, genuine fueling
- ✓ Designed to be your only nutrition source
- ✗ Very sweet taste at full concentration
- ✗ Uses dextrose (glucose), can spike blood sugar
- ✗ Harder to find in European stores
Tailwind is the ultimate all-in-one solution for endurance runners. The entire philosophy is simple: put everything you need in your bottle and stop carrying gels, chews and separate electrolyte tabs. Each serving provides 200 calories from dextrose (a simple sugar that absorbs rapidly), plus a full spectrum of electrolytes including 310mg of sodium.
Ultra runners love Tailwind because it eliminates the complexity of multi-product nutrition strategies. When you are 8 hours into a 100-mile race, the last thing you want is to calculate which gel to eat next. Just drink your Tailwind. The downside is sweetness fatigue — the taste can become overwhelming after hours of drinking it. Many ultra runners alternate with plain water to manage this.
7. 226ERS Hydrazero — Best Spanish brand
Best for: runners in Spain, zero-calorie hydration, clean formula fans
- ✓ Clean ingredients, no artificial colors
- ✓ Zero calories, suitable for fasted training
- ✓ Widely available in Spanish running stores
- ✗ Less known outside Spain
- ✗ No carbohydrates for fueling
- ✗ Flavor options more limited than global brands
226ERS is a Spanish sports nutrition brand that has grown significantly in Europe. Their Hydrazero is a zero-calorie electrolyte drink designed for pure hydration without the sugar or carbs. The formula is clean: electrolytes, natural flavoring and stevia as a sweetener. No artificial colors, no unnecessary additives.
What makes 226ERS special is their focus on gut-friendly formulas. Many of their products are designed for sensitive stomachs, and Hydrazero is no exception. If you often experience GI issues with other brands, 226ERS is worth trying. Widely available in Spanish running shops and increasingly in European online retailers. Great value for the quality.
8. High5 Zero — Best zero calorie
Best for: weight-conscious runners, everyday hydration, hot climate running
- ✓ Zero calories with a great taste
- ✓ Light, refreshing flavors
- ✓ Very affordable per serving
- ✗ Lower sodium than SiS or PowerBar
- ✗ No fuel component for long runs
- ✗ Can taste slightly chemical at high concentration
High5 Zero is one of the best-selling electrolyte tablets in the UK and Europe, and for good reason. At a fraction of the cost of premium brands, you get a refreshing zero-calorie electrolyte drink with a genuinely pleasant taste. The citrus and berry flavors are among the most drinkable in this category.
The formula covers the four main electrolytes (sodium, potassium, magnesium, calcium) with added vitamin C. It dissolves quickly and does not have the aggressive fizz of some competitors. For runners looking for an affordable daily electrolyte drink to stay hydrated between runs and during easy sessions, High5 Zero is our top budget pick. The price per serving is hard to beat.
9. Isostar Hydrate & Perform — Most classic
Best for: traditional isotonic hydration, all distances, proven formula
- ✓ Scientifically tested isotonic formula
- ✓ Balanced carbs (30g) + electrolytes per serving
- ✓ Available everywhere, extremely reliable
- ✗ Less innovative than newer brands
- ✗ Contains artificial flavors and colors
- ✗ Simpler electrolyte profile (only Na + K)
Isostar has been around since 1977 and their Hydrate & Perform is the definition of a proven, reliable isotonic drink. The formula provides 30 grams of carbohydrates per serving from a mix of sucrose and glucose, plus sodium and potassium. It is a straightforward isotonic drink that does exactly what it promises: hydrate and provide energy.
The advantage of Isostar is its ubiquity and consistency. You can find it in almost every supermarket and sports store in Europe. The orange flavor is a classic that millions of runners have relied on. If you want a no-nonsense isotonic drink without the premium price tag of newer brands, Isostar is a solid, time-tested choice. It will not win innovation awards, but it works.
10. Crown Sport Isotonic Drink — Most versatile
Best for: all-round use, cycling + running, European runners
- ✓ Maltodextrin + fructose dual-source carbs
- ✓ Good electrolyte profile at competitive price
- ✓ Works for running, cycling and triathlon
- ✗ Less well-known brand internationally
- ✗ Fewer flavor options than major brands
- ✗ Packaging less refined than premium competitors
Crown Sport Nutrition is a Spanish brand that has earned a strong reputation in European endurance sports. Their Isotonic Drink uses a modern dual-source carbohydrate formula (maltodextrin + fructose), which allows higher carbohydrate absorption rates than single-source drinks. Combined with a solid electrolyte profile, it is a genuinely versatile option.
What sets Crown Sport apart is the value proposition. You get a scientifically formulated isotonic drink with dual-source carbs at a price well below Maurten or SiS. It works for running, cycling, triathlon — any endurance sport. If you are a multi-sport athlete looking for one drink to cover all your bases without breaking the bank, Crown Sport is an excellent choice.
Quick comparison table
| Product | Format | Calories | Sugar | Best for |
|---|---|---|---|---|
| Maurten 320 | Powder | 320kcal | Yes | Marathon, hydrogel tech |
| Maurten 160 | Powder | 160kcal | Yes | Training, half marathon |
| SiS Hydro | Tablets | 0kcal | No | Electrolytes, hot weather |
| Nuun Sport | Tablets | 10kcal | 1g | Daily hydration, flavors |
| PowerBar 5 Elec. | Tablets | 0kcal | No | Caffeine boost, mornings |
| Tailwind | Powder | 200kcal | Yes | Ultra, all-in-one fuel |
| 226ERS Hydrazero | Powder | 0kcal | No | Clean formula, Spain |
| High5 Zero | Tablets | 0kcal | No | Budget, zero calorie |
| Isostar H&P | Powder | 120kcal | Yes | Classic isotonic |
| Crown Sport | Powder | 130kcal | Yes | Versatile, value |
Quick summary: which one to buy
- Best overall for racing: Maurten Drink Mix 320 — hydrogel technology, elite-proven
- Best for everyday training: Maurten Drink Mix 160 or Nuun Sport
- Best zero-calorie electrolytes: SiS Hydro Tablets or High5 Zero
- Best all-in-one for ultras: Tailwind Nutrition
- Best with caffeine: PowerBar 5 Electrolytes
- Best budget option: High5 Zero or Isostar Hydrate & Perform
- Best clean formula: 226ERS Hydrazero
- Best value isotonic: Crown Sport Isotonic Drink
Frequently asked questions
How much water should I drink while running?
A general guideline is 150-250ml every 15-20 minutes during runs longer than 60 minutes. However, sweat rates vary hugely between individuals. A better approach is to weigh yourself before and after a long run: every kilogram lost equals roughly 1 liter of fluid deficit. Aim to replace 80% of sweat losses during the run and the rest afterward.
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Do I need electrolytes or is plain water enough?
For runs under 60 minutes, plain water is usually sufficient. For longer runs, especially in hot weather, electrolyte drinks are recommended because you lose sodium, potassium and magnesium through sweat. Sodium is the most important electrolyte to replace: losing too much without replacing it can lead to hyponatremia, a dangerous condition where blood sodium levels drop too low.
What is the difference between isotonic, hypotonic and hypertonic drinks?
Isotonic drinks have a similar concentration to blood and are absorbed quickly while providing carbs and electrolytes — most sports drinks fall in this category. Hypotonic drinks have a lower concentration and are absorbed fastest, ideal for pure hydration without much energy. Hypertonic drinks have higher concentration and provide more energy but are absorbed more slowly and can cause stomach issues during running.
Can I make my own electrolyte drink at home?
Yes. A simple recipe is: 500ml water, a pinch of salt (about 1/4 teaspoon for 300mg sodium), 2 tablespoons of honey or maple syrup, and a squeeze of lemon. This provides basic electrolytes and carbohydrates. However, commercial options offer more precise and consistent formulations, which matters for race day when you need reliability (Runner's World Nutrition).
Should I use the same hydration drink for training and racing?
Yes, always test your race nutrition in training first. Your stomach needs to adapt to any hydration product, and race day is not the time to experiment. Use your chosen drink in at least 3-4 long training runs before racing with it. Also check what the race provides at aid stations and practice with that brand if you plan to use on-course nutrition rather than carrying your own.
