SLF Electrolyte Comparison · 2026
FAST LYTE Fasting Electrolyte Powder (Unflavored)
Hot-Weather Endurance · Endurance Athletes · Everyday Hydration
Check Current PriceRead full review ↗
Key Nutrients Electrolyte
Everyday Hydration · Exercise & Workouts · Recovery
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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Watch Product Overviews
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Key Nutrients
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At a Glance
A quick side-by-side look at nutrition, value, and overall performance.
| Feature | FAST LYTE Fasting Electrolyte Powder (Unflavored) | Key Nutrients Electrolyte | 🏆 Edge |
|---|---|---|---|
| Sodium | 575 mg | 103 mg | FAST LYTE Fasting Electrolyte Powder (Unflavored) |
| Potassium | 1,175 mg | 250 mg | FAST LYTE Fasting Electrolyte Powder (Unflavored) |
| Magnesium | 100 mg | 100 mg | Tie |
| Sugar | 0.0 g | 0.0 g | Tie |
| Calories | 0 | 0 | Tie |
| Sweetener | None | Stevia Leaf Extract | Preference |
| Cost per serving | $0.60 | $0.60 | Tie |
| SLF rating | ★★★★★4.8/5 | ★★★★★4.6/5 | FAST LYTE Fasting Electrolyte Powder (Unflavored) |
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.
Key Nutrients Electrolyte
- Vitamin C
- Vitamin D3
- Vitamin B6
- Vitamin B12
- Zinc
- Six essential electrolytes
Key Nutrients is a strong zero-sugar, lighter-sodium choice for daily hydration, but it is less compelling for marathon runners.
Key Differences
The most meaningful data-backed differences in this matchup.
FAST LYTE Fasting Electrolyte Powder (Unflavored)
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: Potassium supports fluid balance and normal muscle function.
Key Nutrients Electrolyte
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 Key Nutrients Electrolyte if…
- Everyday Hydration
- Exercise & Workouts
- Recovery
- Travel
- Keto & Low-Carb
- Daily Hydration
- Office Hydration
- Wellness
Key Nutrients is a strong zero-sugar, lighter-sodium choice for daily hydration, but it is less compelling for marathon runners.
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
Key Nutrients Electrolyte
✓ Strengths
- Moderate sodium level suits everyday hydration needs
- 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
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 Key Nutrients Electrolyte instead if you:
- Everyday Hydration
- Exercise & Workouts
- Recovery
- Travel
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 Key Nutrients Electrolyte
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?
FAST LYTE Fasting Electrolyte Powder (Unflavored) contains 575 mg of sodium per serving, compared with 103 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?
Tie is currently less expensive at $0.60 per serving, compared with $0.60. 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. Key Nutrients Electrolyte lists Vitamin C, Vitamin D3, Vitamin B6, Vitamin B12, Zinc, Six essential electrolytes. 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. Key Nutrients Electrolyte 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.