Electrolytes matter year-round, not just during the summer. Whether you’re exercising in the cold, preparing for a marathon, or logging endurance miles, electrolytes can help prevent fatigue, cramps, and energy dips.

Indoor training can also make you dehydrated. Powerful fans and dry air can increase fluid loss, even if you don’t feel hot.

A common mistake is assuming hydration is only a hot-weather issue. Registered dietitian and personal trainer Anthony DiMarino reminds athletes that dehydration still happens in cold weather, even when sweat is less obvious. “Darker yellow urine, cramping, fatigue, and difficulty concentrating are all signs you’re under-hydrated,” he explains.

To help you stay hydrated and train well through every season, we’ve rounded up the best electrolyte powders for cyclists, runners, endurance athletes, and indoor training. Most come in convenient single-serve options that are easy to use during workouts or travel.

This is an unsponsored list. We’ve personally tested and purchased many of these products for our indoor and outdoor training sessions.

We may earn a commission through our affiliate links at no extra cost to you.

How to Choose an Electrolyte Powder

Like energy gels, electrolyte powders come in many flavors and varieties. They also vary widely in sodium content, ingredients, and sweetness. Here are the key ingredients to keep in mind for your training and sweat rate.

1. Sodium

For athletes, sodium is the most important electrolyte to consider. It’s primarily lost in sweat and helps maintain a crucial fluid balance in the body.

As a general rule, aim to replace one gram per hour with heavy sweat loss. You may need far less if you’re sweating lightly or exercising for less than an hour. For more personalized results, check out this sweat and sodium loss calculator.

2. Potassium & Magnesium

Unlike sodium, potassium and magnesium are considered secondary (but still useful). Your sweat contains small amounts of magnesium, calcium, and potassium. Potassium helps with fluid balance while magnesium supports muscle function.

3. Sugar vs. No-Sugar Electrolytes

Some electrolyte powders include added sugars, but others don’t. Your needs may depend on the type and duration of activity, along with your personal preferences. Keep in mind that blood sugar spikes can lead to energy crashes, and added calories may contribute to weight gain.

4. Artificial Sweeteners & Flavoring

If you want a healthier electrolyte powder or are sensitive to artificial ingredients like sucralose or stevia, look for electrolyte powders with minimal additives and short ingredient lists.

The Best Electrolyte Powders to Maximize Training & Performance

As endurance runners and cyclists, we’ve tested several electrolyte powders. Right now, we use Skratch Labs on long rides and runs, and during Peloton endurance classes. After hard workouts, we refresh with Liquid I.V.

Just as the best protein powders for athletes vary based on individual needs and preferences, hydration is also personal. Dietary restrictions, sweat rates, and training styles are important to consider. Running and cycling may require different approaches, but one rule always applies: don’t try a new electrolyte powder for the first time on race day.

1. LMNT ($45.00) — Best Electrolyte Powder for Heavy Sweating

If you’re a heavy sweater, the LMNT electrolyte drink mix could be a good choice. It’s packed with sodium (1,000mg per serving) and tastes as salty as it sounds. We find it works best in hot weather, endurance runs and rides, and long bike trainer workouts. This low-carb formula also delivers 200mg potassium and 60mg magnesium per serving.

2. Skratch Labs Hydration Mix ($35.95) — Best Overall for Cyclists & Runners

The Skratch Labs Sport Drink Mix is our go-to choice for long endurance rides (45+ miles) and distance running. It tastes good, is easy to digest, and simplifies fueling. No need for mid-ride gel stops. However, it’s not the easiest to mix. It requires a good shake and can clump as it settles.

3. Precision Hydration 1000/1500 ($11.99) — Best for Endurance Athletes

Like the LMNT electrolyte packets, the Precision Hydration tablets are best if you sweat heavily. However, you also have more control over the amount of sodium you consume. These tablets range from 500-1,500mg, and you can adjust intake based on sweat rate. They’re ideal for long workouts and races, intense training blocks, and fine-tuning your performance.

4. Nuun Sport ($27.38) — Best for Traveling

We love Nuun Sport tablets because they’re highly portable and easy to stash in a jersey pocket or waist pack. Plus, the individual tablets reduce packaging waste. We’ve tried every flavor in this package and enjoyed all of them. If you have GI sensitivities, just note that these tablets fizz when mixed with water.

5. Tailwind Endurance Fuel ($22.05)

As with Skratch Labs, the Tailwind Endurance Fuel formula is carb-heavy. That makes it a great choice for long-distance athletes who prefer to ditch the gels and chews for one simple solution for hydration and calories. To avoid potential GI upset, try taking small sips of this formula as you go.

6. REDMOND Re-Lyte Hydration Electrolyte Powder Mix ($44.99)

REDMON Re-Lyte hydration mix, another good option for heavy sweaters, features Redmond salt and a handful of other clean ingredients. However, the 810mg of sodium per serving might be too concentrated. If needed, start with half a scoop or add more water to find a good balance.

7. Micro Ingredients Electrolyte Powder ($34.95)

If you’re looking for the healthiest electrolyte powder, this one stands out for its all-natural ingredients like lemon juice powder and coconut water powder. It’s also light on salt but heavier on potassium and magnesium, making it a good choice for everyday training and lighter sweaters. Unfortunately, it’s not sold in individual packets.

8. Hi-Lyte K1000 Electrolytes Powder Mix ($33.96)

Can’t stand the taste of most electrolyte powders? This unflavored mix has no overwhelming taste or aftertaste. It’s high in potassium (1,000mg) per serving and contains no sugar, gluten, or artificial ingredients. However, heavy sweaters should note the minimal sodium content.

9. Liquid I.V. Hydration Multiplier ($23.46)

We love rehydrating after a long run or ride with this refreshing lemon lime formula. It blends well with water and is packed with vitamins and nutrients to support recovery. However, flavor choices are limited compared to some other electrolyte powders on this list.

FAQs

How can athletes tell if they’re dehydrated?

According to Anthony, common signs of dehydration in athletes include dark yellow urine, cramping, fatigue, headaches, dry skin, increased thirst, and difficulty concentrating.

How much electrolytes do endurance athletes actually need?

Water is often sufficient for workouts under 60 minutes, Anthony explains. Electrolytes can help between 60 and 90 minutes. For 90+ minutes, electrolytes and carbs support performance, especially for heavy sweaters.

Which is the healthiest electrolyte powder?

In general, the healthiest electrolyte powder is made without artificial sweeteners or dyes. Look for simple ingredient lists and adequate sodium (300-800mg).

What’s the best electrolyte powder with no artificial sweeteners?

Look for stevia-sweetened or unsweetened options. Some of our top picks include LMNT, Skratch Labs, Hydrant, and Precision Hydration.

What’s the best electrolyte powder for marathon or ultra-distance runners?

For long-distance running, look for electrolyte powders with higher sodium and carbs. Our personal favorites include LMNT and Skratch Labs.

Do cyclists and runners need different electrolytes?

Not necessarily. However, cyclists often tolerate higher-carb mixes more easily since drinking is simpler on the bike. Runners may prefer lighter, more GI-friendly formulas.