Best Electrolytes for Intermittent Fasting: 2026 Comparison
The best electrolyte powders for intermittent fasting and extended fasts. Zero-calorie options that won't break your fast, with comparison of electrolyte content and taste.
Side-by-Side Comparison
| Product | Rating | Calories | Carbs | Fasting-Safe | Breaks Fast? |
|---|---|---|---|---|---|
| LMNT Electrolyte Powder | 4.9 | 30 | $1.33 | 0/0g | Sugar-Free |
| Dr. Berg's Electrolyte Powder | 4.7 | 100 | $0.50 | 0/0g | Sugar-Free |
| Key Nutrients Electrolyte Powder | 4.5 | 90 | $0.33 | 0/0g | Sugar-Free |
| Redmond Re-Lyte | 4.4 | 30 | $1.00 | 0/0g | Sugar-Free |
| Fasting Salts by Fasting Supplies | 4.3 | 60 | $0.67 | 0/0g | Sugar-Free |
LMNT Electrolyte Powder
4.9LMNT is the #1 choice for fasting — zero calories, zero carbs, and zero ingredients that could trigger an insulin response. It's explicitly formulated and marketed for fasting protocols.
Detailed Product Reviews
Servings
30
Price/Serving
$1.33
Key Electrolytes
0/0g
Sugar-Free
Yes
Pros
- Zero calories
- Won't break fast
- Clean ingredients
- Fasting-approved
Cons
- Expensive for daily use
- Limited flavors
LMNT is the #1 choice for fasting — zero calories, zero carbs, and zero ingredients that could trigger an insulin response. It's explicitly formulated and marketed for fasting protocols.
Servings
100
Price/Serving
$0.50
Key Electrolytes
0/0g
Sugar-Free
Yes
Pros
- Zero calories
- Best value
- 1,000mg potassium
- Won't break fast
Cons
- Large scoop
- Salty taste
Dr. Berg's is a zero-calorie electrolyte that won't break your fast. With 100 servings per container, it's the most affordable fasting-safe option for daily intermittent fasting.
Servings
90
Price/Serving
$0.33
Key Electrolytes
0/0g
Sugar-Free
Yes
Pros
- Zero calories
- Budget-friendly
- Good mineral profile
- 90 servings
Cons
- Stevia aftertaste
- Trace calorie potential
Key Nutrients is technically zero-calorie but uses both stevia and monk fruit. While unlikely to break a fast, strict fasters may prefer options with fewer ingredients.
Servings
30
Price/Serving
$1.00
Key Electrolytes
0/0g
Sugar-Free
Yes
Pros
- Zero calories
- Real salt source
- Clean label
- Stevia-free options
Cons
- Higher cost
- Taste varies
Redmond Re-Lyte offers a stevia-free option for fasters who want to avoid any sweetener during their fasting window. Its real salt source provides natural trace minerals.
Servings
60
Price/Serving
$0.67
Key Electrolytes
0/0g
Sugar-Free
Yes
Pros
- Made for fasting
- No flavoring
- Pure minerals only
- Affordable
Cons
- No taste options
- Hard to mix
- Very salty
Fasting Salts is the purest option — just sodium chloride, potassium chloride, and magnesium citrate with no sweeteners, flavors, or fillers. It's the closest thing to a 'fasting prescription' electrolyte.
Frequently Asked Questions
Final Verdict
After thorough testing and comparison, LMNT Electrolyte Powder stands out as our top recommendation in the Electrolyte Powders category. With a rating of 4.9/5.0 and 30 servings at just $1.33 per serving, it delivers exceptional value and performance.
Whether you're looking for keto-friendly options, sugar-free formulas, or the best electrolyte content per dollar, our comparison above gives you all the data you need to make an informed decision.
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Check Price on AmazonDr. Sarah Mitchell
PhD Nutrition Science • Certified Sports Dietitian
Dr. Mitchell is a board-certified sports dietitian with over 12 years of experience in electrolyte and hydration research. She has published 30+ peer-reviewed papers on mineral metabolism and consults for professional athletic teams on optimal hydration strategies. Her expertise in electrolyte balance helps thousands of readers make informed supplement choices.
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