SLF Electrolyte Comparison · 2026
FAST LYTE Fasting Electrolyte Powder (Unflavored)
Hot-Weather Endurance · Endurance Athletes · Everyday Hydration
Check Current PriceRead full review ↗
LMNT Electrolyte Drink Mix
Hot-Weather Endurance · Endurance Athletes · Everyday Hydration
Check Current PriceRead full review ↗FAST LYTE Fasting Electrolyte Powder (Unflavored)
Best overall data score for this matchup based on formula, value, rating, and intended use.
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Continue to the full Brand Hubs for products, flavors, buying guides, and every published comparison.
Explore Top Amazon Flavors
See the three most-reviewed Amazon benchmark flavors currently tracked for each eligible brand in this comparison.
LMNT Favorites
Citrus Salt
Bright lemon-lime citrus with a clean acidic lift and pronounced saltiness.
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Watermelon Salt
Juicy watermelon candy notes balanced by LMNT's strong salty mineral profile.
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Raspberry Salt
Tart raspberry with light citrus acidity and a distinctly salty finish.
Check Amazon Price → Read Raspberry Salt Review →Watch Product Overviews
Watch this product overview before reading the detailed side-by-side comparison.
LMNT
Watch this quick overview before reading the detailed side-by-side comparison.
At a Glance
A quick side-by-side look at nutrition, value, and overall performance.
| Feature | FAST LYTE Fasting Electrolyte Powder (Unflavored) | LMNT Electrolyte Drink Mix | 🏆 Edge |
|---|---|---|---|
| Sodium | 575 mg | 1,000 mg | LMNT Electrolyte Drink Mix |
| Potassium | 1,175 mg | 200 mg | FAST LYTE Fasting Electrolyte Powder (Unflavored) |
| Magnesium | 100 mg | 60 mg | FAST LYTE Fasting Electrolyte Powder (Unflavored) |
| Sugar | 0.0 g | 0.0 g | Tie |
| Calories | 0 | 0 | Tie |
| Sweetener | None | Stevia Leaf Extract | Preference |
| Cost per serving | $0.60 | $1.43 | FAST LYTE Fasting Electrolyte Powder (Unflavored) |
| SLF rating | ★★★★★4.8/5 | ★★★★★4.8/5 | Tie |
Hydra Cup ShakerShark 28 oz Shaker Bottle 2-Pack
A 28 oz shaker designed with a weighted mixing whisk to blend protein, electrolytes, collagen, and workout hydration powders with less shaking and fewer clumps.
Shop at AmazonFunctional Ingredients
Additional active or performance-oriented ingredients recorded in the SLF database.
FAST LYTE Fasting Electrolyte Powder (Unflavored)
- 74+ Trace Minerals
- Ancient Ocean® Pink Himalayan Salt
- Multimineral Complex
- Red Algae Mineral Source
FAST LYTE is a strong zero-sugar, performance-ready choice for extended fasting, but it is less compelling for people wanting flavored drink mixes.
LMNT Electrolyte Drink Mix
- Sodium ChloridePotassium ChlorideMagnesium MalateStevia Leaf ExtractCitric Acid
LMNT earns our highest recommendation for people who need maximum sodium replacement without added sugar. Its 1,000 mg sodium formula makes it one of…
Key Differences
The most meaningful data-backed differences in this matchup.
LMNT Electrolyte Drink Mix
Why it matters: Higher sodium can better replace larger sweat losses during prolonged exercise or heat.
FAST LYTE Fasting Electrolyte Powder (Unflavored)
Why it matters: A lower cost per serving can make frequent use more practical.
FAST LYTE Fasting Electrolyte Powder (Unflavored)
Why it matters: Potassium supports fluid balance and normal muscle function.
FAST LYTE Fasting Electrolyte Powder (Unflavored)
Why it matters: A broader functional-ingredient profile may appeal to users seeking vitamins or carbohydrate-assisted hydration.
Who Should Choose Each Product?
Use these guidelines to find the best fit for your hydration needs and lifestyle.
Choose FAST LYTE Fasting Electrolyte Powder (Unflavored) if…
- Hot-Weather Endurance
- Endurance Athletes
- Everyday Hydration
- Exercise & Workouts
- Recovery
- Travel
- Heat & Outdoor Work
- Keto & Low-Carb
FAST LYTE is a strong zero-sugar, performance-ready choice for extended fasting, but it is less compelling for people wanting flavored drink mixes.
Choose LMNT Electrolyte Drink Mix if…
- Hot-Weather Endurance
- Endurance Athletes
- Everyday Hydration
- Exercise & Workouts
- Recovery
- Travel
- Heat & Outdoor Work
- Keto & Low-Carb
LMNT earns our highest recommendation for people who need maximum sodium replacement without added sugar. Its 1,000 mg sodium formula makes it one of the strongest choices for keto and low-carb lifestyles, endurance athletes, heavy sweaters, and people who practice intermittent fasting. If your hydration needs are more casual, you're limiting sodium intake, or you prefer a sweeter drink, another electrolyte mix may be a better everyday option.
Pros and Considerations
FAST LYTE Fasting Electrolyte Powder (Unflavored)
✓ Strengths
- Substantial sodium supports exercise and hot-weather hydration
- Sugar-free formula
- Provides meaningful potassium
- Includes a useful amount of magnesium
- Competitive cost per serving
● Keep in Mind
- Taste and electrolyte strength may not suit every preference
LMNT Electrolyte Drink Mix
✓ Strengths
- Very high sodium supports heavy sweating and demanding endurance use
- Sugar-free formula
- Provides meaningful potassium
- Includes a useful amount of magnesium
- Fits keto and low-carbohydrate lifestyles
● Keep in Mind
- Taste and electrolyte strength may not suit every preference
FAST LYTE Fasting Electrolyte Powder (Unflavored)
SLF scoring considers nutrition, formula, price, certifications, intended use, and value.
Why it earns the edge
- Substantial sodium supports exercise and hot-weather hydration
- Sugar-free formula
- Provides meaningful potassium
- Includes a useful amount of magnesium
Choose LMNT Electrolyte Drink Mix instead if you:
- Hot-Weather Endurance
- Endurance Athletes
- Everyday Hydration
- Exercise & Workouts
Choose Your Electrolyte
Shop the product that best fits your needs. Amazon is shown first when available, with a direct brand option as the fallback.
FAST LYTE Fasting Electrolyte Powder (Unflavored)
Check Price on Amazon LMNT Electrolyte Drink Mix
Check Price on AmazonFind the electrolyte that fits your needs
Explore the full database by activity, sodium level, sugar preference, goals, budget, and retailer.
Frequently Asked Questions
Data-backed answers based on the current SLF product records.
Which has more sodium?
LMNT Electrolyte Drink Mix contains 1,000 mg of sodium per serving, compared with 575 mg. Higher sodium may be more useful when replacing larger sweat losses during prolonged exercise or hot conditions.
Which has less sugar?
Tie has less sugar at 0.0 g per serving, versus 0.0 g. This may matter for people limiting added sugar.
Which is less expensive per serving?
FAST LYTE Fasting Electrolyte Powder (Unflavored) is currently less expensive at $0.60 per serving, compared with $1.43. Pricing can change by retailer and package size.
What functional ingredients does each product include?
FAST LYTE Fasting Electrolyte Powder (Unflavored) lists 74+ Trace Minerals, Ancient Ocean® Pink Himalayan Salt, Multimineral Complex, Red Algae Mineral Source. LMNT Electrolyte Drink Mix lists Sodium ChloridePotassium ChlorideMagnesium MalateStevia Leaf ExtractCitric Acid. Functional ingredients supplement the core electrolyte profile but do not automatically make one product better for every use.
Which product is better overall?
FAST LYTE Fasting Electrolyte Powder (Unflavored) earns the higher SLF comparison score based on the available formula, value, rating, and intended-use data. LMNT Electrolyte Drink Mix may still be the better fit when its specific use cases align more closely with your needs.
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Nutrition facts, pricing, and availability can change. Verify the current label before purchasing. This comparison is informational and is not medical advice.