Best Electrolytes for Keto, Scored Sodium-First
Cut the carbs and your kidneys start dumping sodium — that's not a bug, it's the physiology. When insulin drops, the kidney's sodium-retaining signal drops with it, so a keto eater can shed an extra 1,000-3,000mg of sodium a day in the first weeks. That sodium loss is the engine behind 'keto flu': the headaches, cramps, fatigue, and lightheadedness people blame on the diet itself. The fix is unglamorous and well-established — replace sodium first, then potassium and magnesium. The catch is that most 'hydration' powders are built backwards for this job: light on sodium, heavy on sugar. For keto and CrossFit-style training, you want the opposite — a salty, zero-sugar mix. We scored five real, widely-available options on a 6-metric rubric so you can match the dose to your sweat rate, not to a marketing claim.
Top pick
LMNT — LMNT Recharge Electrolyte Drink Mix
1000mg sodium, 200mg potassium, 60mg magnesium, zero sugar, stevia-sweetened, 30 packets
At a glance
Tap a column to sort| # | Best for | Price | ||
|---|---|---|---|---|
| 1 | LMNT — LMNT Recharge Electrolyte Drink Mix | Best overall for keto | 8/10 | Check price |
| 2 | Redmond — Redmond Re-Lyte Hydration Electrolyte Mix | Best rounded profile | 7.7/10 | Check price |
| 3 | Keto Chow — Keto Chow Electrolyte Drops | Best sugar-free | 7.4/10 | Check price |
| 4 | LyteShow — LyteShow Electrolyte Concentrate | Best zero-sweetener liquid concentrate for daily low-carb use | 7.1/10 | Check price |
| 5 | Ultima — Ultima Replenisher Electrolyte Hydration Drink Mix | Best light | 7.3/10 | Check price |
How we scored
Every product below is scored on six metrics, 0-10 each, with the weighting described on how we review. The criteria specific to this category:
- Sodium dose per serving — the single most important number for a keto eater (we favor 800mg+).
- Zero added sugar — no glucose, sucrose, or maltodextrin riding along with your electrolytes.
- Potassium content — the second electrolyte that drops on low-carb, target 200mg+ per serving.
- Magnesium content — commonly under-replaced; supports cramp prevention and sleep on keto.
- Clean label — no artificial colors or dextrose fillers; sweetener (stevia, monk fruit, sucralose) disclosed.
- Third-party testing and COA availability.
What to know before buying
- Keto flu is mostly a sodium-loss problem. The fastest fix in the first 2-4 weeks of low-carb is more salt — many keto practitioners target 3,000-5,000mg sodium/day total from food plus electrolytes. A high-sodium mix does the heavy lifting that a 'lightly salted' hydration drink can't.
- Sugar-free genuinely matters here. An 11g-sugar stick pack can spike insulin enough to blunt ketosis for some people and adds carbs you're trying to avoid. Read the label: 'electrolytes' and 'sugar' are not the same line.
- Look at milligrams of sodium per serving, not just 'has electrolytes.' The useful range for active keto eaters is roughly 500-1,000mg sodium per serving. Sub-100mg daily mixes (Ultima-style) are fine as a light top-up but won't carry you through keto flu or a sweaty WOD.
- Don't ignore potassium and magnesium — sodium gets the headlines, but cramps and poor sleep on keto are often a potassium/magnesium gap. A rounded mix beats a sodium-only one for daily use.
- If you have high blood pressure or kidney disease, talk to your doctor before loading sodium. The high-dose advice here assumes healthy kidneys and an active lifestyle.
Our picks
LMNT — LMNT Recharge Electrolyte Drink Mix
Key specs: 1000mg sodium, 200mg potassium, 60mg magnesium, zero sugar, stevia-sweetened, 30 packets
Check price on AmazonPros
- 1,000mg sodium per packet is the most aggressive dose in the category — purpose-built for low-carb sodium loss and heavy sweat
- Zero sugar, no maltodextrin, no artificial colors
- Transparent label: just electrolytes, citric acid, natural flavor, and stevia leaf extract
- Formulated by a low-carb physician (Dr. James DiNicolantonio is a published sodium researcher), so the keto-first dosing is intentional, not accidental
Cons
- Highest per-packet cost in this group
- 1,000mg sodium is overkill for a sedentary, non-keto day — dose down with water if you're not training or new to low-carb
- Only 60mg magnesium — fine, but you may want a separate magnesium at night
LMNT — LMNT Recharge Electrolyte Drink Mix
- Third-party testing7/10
- Bioavailability9/10
- Clinical evidence8/10
- Value6/10
- Brand transparency9/10
- Form & absorption9/10
Redmond — Redmond Re-Lyte Hydration Electrolyte Mix
Key specs: 810mg sodium, 400mg potassium, 60mg magnesium, plus calcium & chloride, zero sugar, stevia/monk fruit
Check price on AmazonPros
- 810mg sodium keeps it firmly in keto-useful territory while adding a strong 400mg potassium — the most balanced sodium-to-potassium ratio here
- Includes calcium and a meaningful chloride dose, not just the headline three
- Zero sugar, sweetened with stevia and monk fruit; an unflavored/no-sweetener version exists for purists
- Uses real (Redmond) sea salt as the sodium source, disclosed on label
Cons
- 60mg magnesium is modest for the price tier
- Some flavors lean salty-sweet, which divides taste opinions
- Less independent clinical visibility than LMNT
Redmond — Redmond Re-Lyte Hydration Electrolyte Mix
- Third-party testing7/10
- Bioavailability8/10
- Clinical evidence7/10
- Value7/10
- Brand transparency8/10
- Form & absorption8/10
Keto Chow — Keto Chow Electrolyte Drops
Key specs: Per dropper: ~250mg sodium, 250mg potassium, 65mg magnesium (scalable), zero sugar, zero flavor, liquid concentrate
Check price on AmazonPros
- Unflavored liquid drops let you dial sodium up or down and add to coffee, broth, or any drink without sweetener or color
- Genuinely zero sugar, zero carbs, zero sweetener — nothing to break a fast or stall ketosis
- Balanced sodium/potassium/magnesium per serving, and you can stack droppers to hit a 750mg+ sodium dose on training days
- Built by a keto-focused brand, so the formula assumes low-carb sodium needs
Cons
- Concentrated drops have a strong mineral taste in plain water — best mixed into flavored or salty drinks
- Per-dropper sodium is moderate; you must dose multiple drops to match a single LMNT packet
- Liquid format is less travel-convenient than stick packs
Keto Chow — Keto Chow Electrolyte Drops
- Third-party testing6/10
- Bioavailability8/10
- Clinical evidence6/10
- Value8/10
- Brand transparency8/10
- Form & absorption7/10
LyteShow — LyteShow Electrolyte Concentrate
Key specs: Per serving (~1/2 tsp): ~110mg sodium, 80mg potassium, 65mg magnesium, plus zinc & chloride, zero sugar, no sweetener
Check price on AmazonPros
- No sugar and no sweetener at all — pure ionic mineral concentrate, won't interfere with fasting or ketosis
- Adds zinc and a solid magnesium dose alongside the core electrolytes
- Highly mixable into water or sparkling water; you control the strength
- Long-running, well-reviewed product with a simple, transparent mineral list
Cons
- Sodium per standard serving is low for keto flu — you'll need 4-6x the label serving to approach a high-sodium dose
- Tart, slightly sour taste when concentrated
- Better as a daily mineral top-up than as a stand-alone heavy-sweat performance mix
LyteShow — LyteShow Electrolyte Concentrate
- Third-party testing6/10
- Bioavailability8/10
- Clinical evidence6/10
- Value7/10
- Brand transparency8/10
- Form & absorption7/10
Ultima — Ultima Replenisher Electrolyte Hydration Drink Mix
Key specs: 55mg sodium, 250mg potassium, 100mg magnesium, plus calcium & zinc, zero sugar, stevia-sweetened
Check price on AmazonPros
- Highest magnesium in this group at 100mg, plus calcium and zinc — a genuinely rounded micro-mineral profile
- Zero sugar, no artificial colors (plant-based coloring), stevia-sweetened
- Pleasant, light flavor that's easy to drink all day; affordable in bulk tubs
Cons
- Only 55mg sodium — far too low to fix keto flu or replace heavy-sweat losses on its own
- Best paired with extra salt (or a high-sodium mix) if you're actually low-carb and training
- Marketed as 'hydration' but functions more like a daily mineral drink than a performance electrolyte
Ultima — Ultima Replenisher Electrolyte Hydration Drink Mix
- Third-party testing7/10
- Bioavailability8/10
- Clinical evidence6/10
- Value8/10
- Brand transparency9/10
- Form & absorption8/10
Frequently asked questions
When you cut carbs, insulin falls, and lower insulin tells your kidneys to excrete more sodium and water instead of holding onto it. In the first few weeks of low-carb you can lose an extra 1,000-3,000mg of sodium per day — and potassium and magnesium follow. That depletion is the main driver of 'keto flu': headaches, fatigue, cramps, brain fog, and lightheadedness. Replacing those electrolytes, sodium first, usually resolves the symptoms quickly.
Sources
- Electrolyte and fluid replacement for the physically active (ACSM Position Stand) — Medicine & Science in Sports & Exercise, 2007
- Beyond Weight Loss: A Review of the Therapeutic Uses of Very-Low-Carbohydrate (Ketogenic) Diets (notes increased sodium/fluid loss and electrolyte needs) — European Journal of Clinical Nutrition, 2013
- Dietary Reference Intakes for Sodium and Potassium — National Academies of Sciences, Engineering, and Medicine, 2019
- The Salty Truth — sodium, low-carb diets, and electrolyte replacement — Diet Doctor, 2023
Last verified: June 18, 2026. See our editorial policy and how we review for details on scoring and update cadence. Canonical URL: https://trustedhealthgear.com/reviews/best-electrolytes-for-keto.