The best electrolytes for keto are high-sodium, zero-sugar brands that cost the least per gram of sodium. Keto dieters need 3,000–5,000mg of sodium daily, which means 3+ servings of most supplements. Cost per serving is misleading. Daily cost is what matters.
We pulled data on all 17 brands in our comparison table, filtered out the 3 with sugar, and ranked the remaining 14 by daily cost to hit 3,000mg sodium. The cheapest option is Hydrate Pro at $2.34/day. Redmond Re-Lyte comes in at $2.78/day with double the potassium. LMNT works but costs $4.50/day for the same sodium target.
Why Does Keto Deplete Electrolytes?
When you cut carbs, your insulin levels drop. Low insulin signals your kidneys to excrete more sodium.[1] As sodium leaves, potassium and magnesium follow. This is a well-documented effect of carbohydrate restriction.
There's a second factor most people miss. Switching from processed food to whole food on keto removes your primary source of dietary sodium. Processed food accounts for roughly 70% of sodium intake in a typical American diet. Go keto, cut the processed food, and you've eliminated most of your sodium overnight.
The result: "keto flu." Headaches, fatigue, brain fog, muscle cramps, irritability.[2] It hits in the first 1–2 weeks and convinces a lot of people that keto isn't for them. In most cases it's just electrolyte depletion, and it's fixable within hours with adequate sodium. The fix isn't complicated or expensive. You just need enough of the right minerals.
How Much Sodium Do You Need on Keto?
Multiple clinical sources converge on the same range. Virta Health recommends 3,000–5,000mg sodium daily. Diet Doctor recommends 3,000–7,000mg (from 7–17g of salt). Phinney's research on ketogenic diets and physical performance emphasizes that optimized sodium and potassium intake is essential for maintaining endurance on low-carb diets.[3] Both clinical sources also recommend 3,000–4,700mg potassium and 300–500mg magnesium.
These numbers are significantly higher than the general dietary guideline of 2,300mg sodium. That guideline targets the average American eating processed food. Keto dieters are in a completely different metabolic state with much higher sodium turnover. Potassium and magnesium needs also increase when sodium excretion rises, as the minerals work together to maintain fluid balance.[4][5] If you're salting your food generously, you might get 1,000–2,000mg from diet alone. The rest needs to come from supplementation.
For this comparison, we use 3,000mg as the daily sodium target. That's the floor of every clinical recommendation. If you're active, sweating heavily, or in the first few weeks of keto, you may need more.
Every Keto-Friendly Brand, Ranked by Daily Cost
Here are all 14 sugar-free (or near-zero sugar) electrolyte brands from our comparison, sorted by what it costs per day to reach 3,000mg sodium from supplements alone.
| Brand | Sodium | $/Serving | $/g Sodium | Daily Cost @3g Na | K | Mg | Sugar | Form |
|---|---|---|---|---|---|---|---|---|
| Hydrate Pro | 1,000mg | $0.78 | $0.78 | $2.34 | 200mg | 60mg | 0g | Tub/Scoop |
| Redmond Re-Lyte | 810mg | $0.75 | $0.93 | $2.78 | 400mg | 50mg | 0g | Tub/Scoop |
| Vitassium | 500mg | $0.50 | $1.00 | $3.00 | 100mg | 0mg | 0g | Capsules |
| Zerolyte | 1,000mg | $1.20 | $1.20 | $3.60 | 150mg | 50mg | 0g | Stick Pack |
| SALTT | 969mg | $1.17 | $1.21 | $3.62 | 415mg | 178mg | 0g | Stick Pack |
| Santa Cruz Paleo | 800mg | $1.00 | $1.25 | $3.75 | 300mg | 75mg | 0g | Tub/Scoop |
| LMNT | 1,000mg | $1.50 | $1.50 | $4.50 | 200mg | 60mg | 0g | Stick Pack |
| Nuun Sport | 300mg | $0.52 | $1.73 | $5.20 | 150mg | 25mg | 1g | Tablet |
| Thorne Daily | 480mg | $1.33 | $2.77 | $8.31 | 200mg | 60mg | 0g | Stick Pack |
| Key Nutrients | 110mg | $0.33 | $3.00 | $9.00 | 200mg | 60mg | 0g | Tub/Scoop |
| Liquid IV (SF) | 500mg | $1.56 | $3.12 | $9.36 | 370mg | 0mg | 0g | Stick Pack |
| Instant Hydration | 500mg | $1.60 | $3.20 | $9.60 | 300mg | 45mg | 0g | Stick Pack |
| Ultima Replenisher | 55mg | $0.53 | $9.64 | $28.91 | 250mg | 100mg | 0g | Tub/Scoop |
| Nectar | 100mg | $1.06 | $10.60 | $31.80 | 200mg | 50mg | 0g | Stick Pack |
Data verified against manufacturer websites. Prices as of March 2026. See the full 17-brand comparison →
The $/serving trap: Key Nutrients looks like the cheapest at $0.33/serving. But each serving has only 110mg sodium. To hit 3,000mg, you'd need 27 scoops at $9.00/day. Meanwhile, Hydrate Pro at $0.78/serving has 1,000mg sodium. Three scoops gets you there for $2.34. Always compare cost per gram of sodium, not cost per serving.
Which Brands Should Keto Dieters Avoid?
Three brands in our comparison contain enough sugar to be a problem on keto. At 3+ servings per day (what most keto dieters need for adequate sodium), the sugar adds up fast.
| Brand | Sugar/Serving | Sweetener | Sugar @3 Servings |
|---|---|---|---|
| DripDrop | 7g | Sugar | 21g |
| NormaLyte | 6.75g | Sugar (Dextrose) | 20.25g |
| Hydrant | 4g | Sugar | 12g |
Most keto dieters aim for under 20–50g total carbs per day. Three servings of DripDrop burns through 21g of that allowance on electrolytes alone. NormaLyte uses dextrose (pure glucose), which triggers an insulin response. Hydrant's 12g across three servings is less dramatic but still a significant chunk of a tight carb budget.
The remaining 14 brands have zero sugar (or 1g in Nuun's case, which is negligible). All use stevia, monk fruit, allulose, or no sweetener at all.
Best Electrolytes for Keto by Priority
Best value: Hydrate Pro. $2.34/day for 3,000mg sodium. Each serving has 1,000mg sodium, 200mg potassium, and 60mg magnesium. Zero sugar. Tub format with 45 servings for $34.99. At three scoops per day, one tub lasts 15 days. Monthly cost: roughly $70.
Best all-around: Redmond Re-Lyte. $2.78/day. Slightly less sodium per serving (810mg) but 400mg potassium, which is double what most competitors offer. That extra potassium matters on keto, where potassium depletion is common. Tub format, 60 servings for $44.99. Monthly cost: roughly $84.
Best capsule: Vitassium. $3.00/day. Capsules solve the taste issue entirely, which some people prefer. 500mg sodium per serving (2 capsules), so you need 6 capsules daily for 3,000mg. No potassium or magnesium, so you'll need those from food or a separate supplement. 50 servings for $24.99.
Best mineral profile: SALTT. $3.62/day. 969mg sodium, 415mg potassium, 178mg magnesium per serving. The most minerals per packet of any brand in our comparison. Three packets per day gives you 2,907mg sodium, 1,245mg potassium, and 534mg magnesium. Stick pack format, 30 packets for $34.99.
Best stick pack on a budget: Zerolyte. $3.60/day. 1,000mg sodium per stick pack, so three packets hits your target exactly. If you want the portability of single-serve packets without LMNT's $4.50/day price tag, Zerolyte saves $0.90/day ($328.50/year).
One note on potassium and magnesium: none of these supplements will fully cover your keto needs for those minerals. Even SALTT at 3 servings only delivers 1,245mg potassium (you need 3,000–4,700mg) and 534mg magnesium (you need 300–500mg, so that one's actually covered). The rest should come from keto-friendly foods: avocados, leafy greens, nuts, salmon, and pumpkin seeds are all high in potassium and magnesium without significant carbs.
The Bottom Line
Keto requires more sodium than most diets. The "keto flu" that derails so many people is almost always fixable with 3,000–5,000mg of sodium per day. The question is what that costs.
At $2.34/day, Hydrate Pro is the cheapest way to hit 3,000mg sodium from a pre-made electrolyte supplement. Redmond Re-Lyte at $2.78/day adds significantly more potassium, which makes it the best all-around pick. LMNT at $4.50/day works but costs nearly double for the same sodium.
Whatever you choose, check the sugar content. Three brands in our comparison have enough sugar per serving to threaten ketosis at keto-level dosing. Stick to the 14 zero-sugar options and sort by daily cost, not per-serving cost.
Compare all 17 brands in our full comparison table to sort by the metric that matters most to you.
References
- Heyman SN, Bursztyn M, Szalat A, Muszkat M, Abassi Z. "Fasting-Induced Natriuresis and SGLT: A New Hypothesis for an Old Enigma." Frontiers in Endocrinology, 2020; 11:217. pmc.ncbi.nlm.nih.gov
- Bostock ECS, Kirkby KC, Taylor BV, Hawrelak JA. "Consumer Reports of 'Keto Flu' Associated With the Ketogenic Diet." Frontiers in Nutrition, 2020; 7:20. pmc.ncbi.nlm.nih.gov
- Phinney SD. "Ketogenic diets and physical performance." Nutrition & Metabolism, 2004; 1:2. pmc.ncbi.nlm.nih.gov
- National Institutes of Health, Office of Dietary Supplements. "Potassium — Health Professional Fact Sheet." Updated June 2, 2022. ods.od.nih.gov
- National Institutes of Health, Office of Dietary Supplements. "Magnesium — Health Professional Fact Sheet." Updated June 2, 2022. ods.od.nih.gov