Best Keto Electrolytes (2026): 6 Sugar-Free Powders & Drops Compared
Updated September 2026 · Prices marked * are typical US ranges — verify current prices. This page currently contains no affiliate links; any added later will be disclosed per our disclosure policy.
When you cut carbs, your body holds onto less water — and flushes out sodium, potassium, and magnesium right along with it. That is why the first weeks of keto so often come with headaches, cramps, fatigue, and the dreaded keto flu. Food alone can cover some of it, but most people doing keto seriously end up looking for an electrolyte supplement.
The problem: most sports drinks are loaded with sugar, and most "electrolyte" products were formulated for marathoners, not people eating low-carb. This comparison covers six sugar-free options that actually fit a ketogenic diet — what is in them, who each one is for, and what they roughly cost per serving. Prices below are typical US ranges (late 2026) and change often — treat them as directional and check current prices before buying. Always confirm exact amounts on the product label.
Quick Picks
Best Overall — LMNT
The category leader for a reason: 1,000 mg sodium, 200 mg potassium, 60 mg magnesium per stick, zero sugar, sweetened with stevia. Bold flavors (including hot ones and caffeinated options) and both powder sticks and ready-to-drink cans. If you are not sure where to start, start here.
Best Clean-Label — Redmond Re-Lyte
Built on Redmond Real Salt with a milder taste than LMNT and an unflavored option. A favorite for people who care about where the salt comes from or find LMNT too salty.
Best Liquid Drops — Keto Chow Fasting Drops
Concentrated liquid electrolytes you add to any drink — ideal if you fast, hate powders, or want to fine-tune each serving. Unflavored and essentially zero carb.
Best Budget — Ultima Replenisher or Key Nutrients
Both land well under a dollar per serving. Ultima is potassium-forward with no sodium; Key Nutrients covers the basics at a friendly price. Fine for light needs, less ideal for heavy keto-flu symptoms.
The Comparison
| Product | Form | Standout trait | Sweetener | Sugar | ~Price/serving* |
| LMNT | Sticks + cans | 1,000 mg sodium — strongest in class | Stevia | 0 g | $1.30–1.60 |
| Redmond Re-Lyte | Tub + sticks | Real Salt base, milder taste, unflavored option | Stevia / monk fruit | 0 g | $1.10–1.40 |
| Ultima Replenisher | Tub + sticks | No sodium — potassium-forward | Stevia | 0 g | $0.35–0.55 |
| Dr. Berg Electrolyte Powder | Tub | Potassium-forward (~1,000 mg) | Stevia | 0 g | $1.00–1.30 |
| Keto Chow Fasting Drops | Liquid drops | Dose-adjustable; built for fasting | None (unflavored) | 0 g | $0.50–0.80 |
| Key Nutrients Electrolytes | Tub | Solid all-rounder, lemon-tea flavor | Stevia | 0 g | $0.50–0.70 |
The Six, In Detail
LMNT — the one everyone measures against
1,000 mg sodium per stick is the headline, and it matters: most keto flu symptoms trace back to sodium loss, and LMNT is the only mainstream stick that really commits to replacing it. A dozen-plus flavors including grapefruit salt, watermelon salt, and hot chocolate; caffeinated options exist. The taste is genuinely salty — that is the point. Roughly $1.30–1.60 per serving with subscription discounts. Best for: anyone with keto flu symptoms, heavy exercisers, hot climates.
Redmond Re-Lyte — the real-salt alternative
Re-Lyte builds its formula on Redmond Real Salt instead of refined sodium chloride, and many drinkers find it noticeably smoother than LMNT. There is an unflavored version — rare in this category — plus stick packs. Check the label for current potassium and magnesium amounts, as Redmond has revised the formula over the years. Best for: clean-label shoppers, people who find LMNT too harsh, Real Salt loyalists.
Ultima Replenisher — the no-sodium outlier
Here is the thing most comparisons miss: Ultima contains essentially no sodium. That makes it wrong for classic keto flu (which is mostly a sodium problem) but right for people who salt their food heavily and just want potassium and magnesium covered. Cheap per serving and widely available. Best for: light supplementation — and for anyone on a sodium-restricted plan for medical reasons, which is a doctor conversation, not a blog decision.
Dr. Berg Electrolyte Powder — the potassium specialist
Marketed hard to the keto crowd, and the formula backs it up with roughly 1,000 mg of potassium per serving — the mirror image of LMNT. Some find the flavor sweet; others like the raspberry-lemon. Best for: people who know they run potassium-low (cramps are the classic sign) and want one product to cover it.
Keto Chow Fasting Drops — for the fine-tuners
A concentrated liquid of sodium, potassium, and magnesium chlorides with nothing else. Add a few drops to water, coffee, or food and dial the dose to your day. No flavor, no sweeteners, no fillers — made by the keto-shake company and beloved in fasting communities. Best for: fasters, purists, and anyone who wants per-dose control.
Key Nutrients — the budget all-rounder
A straightforward zero-sugar blend (lemon-tea is the signature flavor) at roughly half the per-serving cost of the premium sticks. Does not hit LMNT-level sodium, but as a daily background supplement it does the job. Best for: cost-conscious households and a first electrolyte purchase.
How to Choose
If you have keto flu symptoms now (headache, fatigue, cramps): go sodium-forward — LMNT or Re-Lyte, one to two servings a day, plus salt your food.
If you already salt everything and just want potassium/magnesium insurance: Ultima or Dr. Berg cover the gap for less money.
If you fast or hate flavored drinks: Keto Chow drops are the only option here that disappears into whatever you are already drinking.
If budget rules: Key Nutrients or Ultima on subscription.
And the free option, worth saying out loud: a generous pinch of quality salt in water with a squeeze of lemon covers the sodium end for pennies. Supplements are convenience, not magic.
FAQ
Do I actually need electrolytes on keto?
Not everyone. If you salt your food generously, feel fine, and are not exercising heavily, you may not need any. If you get headaches, cramps, or that flat-tired feeling in the first weeks, sodium is the first thing to try.
Is Nuun or Gatorade Zero okay on keto?
Gatorade Zero has no sugar but only about 230 mg sodium per bottle — too little to fix keto flu. Nuun Sport is closer but still modest on sodium and carries 1 g sugar per tab. Fine for casual use, weak medicine for keto adaptation.
Can you take too much?
Yes. More is not better — excess sodium raises blood pressure in salt-sensitive people, and large potassium doses are genuinely dangerous. Start with one serving a day, follow the label, and talk to your doctor if you have heart, kidney, or blood-pressure concerns.
Sticks, tubs, or drops?
Sticks = portable and pre-measured. Tubs = cheaper per serving, less waste. Drops = fully adjustable. Pick based on where you will actually use them.
When should I take them?
Most people do best spreading intake through the day — one mid-morning, one mid-afternoon — rather than one large dose.
Disclaimer: This guide is for informational purposes only and is not medical advice. Always consult with a healthcare provider before starting any new diet, especially if you have pre-existing medical conditions, are pregnant, breastfeeding, or taking medications. Some of the links on this page are affiliate links, which means we may earn a commission if you make a purchase through them at no additional cost to you.