Best keto electrolytes: what to actually buy

If you want the short version: a sugar-free electrolyte drink mix with real sodium, potassium, and magnesium is the easy win on keto. It handles the three minerals you're losing without any sugar, and you don't have to think about it. You can also DIY with plain salt in water for close to nothing — it covers the sodium, which is the big one, and it works. The mixes just add convenience and better balance across all three minerals.

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Why keto burns through electrolytes

When you cut carbs, your insulin drops. Low insulin tells your kidneys to shed sodium, and water follows the sodium out. Potassium and magnesium go with it. That mineral loss — not the lack of carbs itself — drives most of what people call the keto flu: headaches, fatigue, muscle cramps, brain fog, and that generally washed-out feeling in the first week or two.

The fix is straightforward: replace what you're losing. Sodium first, because that's the biggest loss and the fastest to notice, then potassium and magnesium. Our deeper piece on keto electrolytes covers the amounts in more detail.

Your options, honestly compared

Option	Sodium	Sugar	Convenience	Best for
Sugar-free electrolyte mix	High, controlled	None	High — one packet in water	Most people; balanced across all three minerals
DIY salt + water	As much as you add	None	Medium — you measure it	The cheapest fix; sodium only
Bone broth	Moderate	None	Low — you cook or heat it	People who cook; adds a warm, savory option
Electrolyte capsules	Varies by dose	None	High — no mixing, no taste	People who dislike drinking flavored water
Regular sports drinks	Low-to-moderate	High	High	Skip these — the sugar defeats the point on keto

A few honest notes on the table. DIY salt-water covers sodium well but skips potassium and magnesium unless you add them. Bone broth tastes good, but its sodium varies by brand or recipe, so it's hard to dose. Capsules skip the flavor problem, which some people love and others find easy to forget. And regular sports drinks are built around sugar for endurance athletes — the opposite of what keto is doing.

What to look for

Three things separate a useful mix from a marketing exercise:

• Enough sodium. This is the one that matters most and the one under-dosed products skimp on. Look for a meaningful amount per serving, not a token pinch.
• No sugar. No cane sugar, no dextrose, no maltodextrin. Sweetened with something non-caloric or unsweetened.
• Added potassium and magnesium. Sodium alone helps, but the full three-mineral mix is what makes cramps and fatigue back off. This is the main reason to buy a mix instead of just salting water.

That's the whole checklist. Flavor and brand are preference; those three are the substance.

The pick

Redmond Re-Lyte is a clean choice: zero sugar, real sodium from salt, plus potassium and magnesium in the mix. It hits all three of the criteria above without extras you don't need.

Be clear-eyed about this, though: any reputable sugar-free mix with those three minerals will do the job. The popular mixes are more alike than their branding suggests. What you're paying for is convenience and a sensible balance in one scoop. DIY salt in water is a legitimate cheap option — it just leaves potassium and magnesium up to you and your food.

Which should you buy?

• Best overall → a sugar-free mix. One packet, all three minerals, no thinking. Re-Lyte or any comparable one.
• Cheapest → DIY salt in water. A good pinch of salt in a glass of water covers the biggest loss for almost nothing.
• Hate powders and flavored water → capsules. Same minerals, no taste, nothing to mix.
• Cooking-heavy → bone broth. If you're already at the stove, it doubles as a warm, savory way to get sodium.

Do you need an electrolyte supplement?

Maybe not. Plenty of people cover their needs by salting their food heavily and eating potassium- and magnesium-rich whole foods — avocado, leafy greens, nuts, salmon. If you're doing that and you feel fine, a supplement is convenience, not a requirement. It's easier to be consistent with a measured mix than with "salt to taste," which is the real argument for one.

If you're not sure whether you're getting enough, logging your meals in Copper Keto Companion over time makes it easier to notice whether you're actually eating enough sodium-rich food while you adapt, instead of guessing.

One factual caution: potassium is the one to be careful with. Large potassium doses can be a problem for people with kidney issues or those on certain blood-pressure or heart medications. Standard electrolyte-mix amounts are modest, but if you're taking potassium separately or have a relevant condition, keep the dose sensible. This is general information — talk to your doctor.

FAQ

What electrolytes do I need on keto? Sodium, potassium, and magnesium. Sodium is the biggest loss and the one you'll feel first; potassium and magnesium help with cramps and fatigue.

Can I just use salt? Yes — plain salt in water covers sodium, which is the main issue, and it's nearly free. It just won't give you potassium or magnesium, so you'll want to get those from food or a mix.

Are the popular mixes worth it? They're worth it for convenience and balance, not because they're irreplaceable. They put all three minerals in one scoop with no measuring. If you don't mind DIY, you can get most of the benefit for a lot less.

How much sodium do I need? More than most people expect on keto, because you're excreting so much. Start on the higher side of what a mix provides or a solid pinch of salt in water, and adjust to how you feel. This is general information — talk to your doctor if you have blood-pressure concerns.

Will electrolytes break my fast? A plain sugar-free electrolyte mix or salt water has no meaningful calories, so it won't break a fast in the way that matters for most people. Watch for added sugar or sweeteners you're avoiding.

Ready to pick one? See our electrolyte picks, or start with the keto guide if you're still getting set up.