Best Potassium Supplements of 2026

Four hundred capsules is a big bottle by the standards of this group — the kind you put in a cupboard and stop thinking about for months. It's also the highest-rated potassium product in this set, which is a combination worth paying attention to when you're choosing something you'll take every day.

Small capsules are the first thing we noticed. They go down without drama, and the formula is vegan, non-GMO and gluten-free, which covers most of the dietary boxes people actually check. It blends citrate with gluconate instead of picking one, and it's designed to sit alongside a separate magnesium rather than bundling one in — the right call if you already run your own electrolyte stack and don't want a second product deciding your magnesium dose for you.

What you pay for that is a higher cost per capsule than our top pick and a good deal more than the Nutricost bottle. You're buying the smaller capsule and the longer runway between reorders, and if neither of those matters to you, the cheaper citrate bottles do the same job. The Frank Suárez name on the label explains the metabolism framing and the magnesium pairing advice; it doesn't change what's inside the capsule.

Five hundred capsules is the whole argument. At one a day that's well over a year of potassium, and the cost per capsule is the lowest of the citrate options here — low enough that we stopped rationing it and started taking it the way you're supposed to, daily and without ceremony. It's 99 mg of elemental potassium in citrate form, non-GMO, gluten-free and third-party tested, made in an NSF-certified facility, which is a lot of reassurance for a bottle that looks like it cost nothing.

What you give up is packaging and any pretense of a lifestyle brand. The bottle is plain, the product page genuinely warns that the lid might be blue or white, and every dollar clearly went into the capsule count instead. For something you take once a day and stop thinking about, that's the right place to spend it.

A hundred tablets is a hundred days at one a day, and this is the least expensive way into potassium in this group by a wide margin. If you're curious whether a supplement does anything for you and don't want to commit to a year of capsules, that combination is hard to argue with.

The label needs a second look before you draw conclusions. 550 mg is the weight of the potassium gluconate compound, not the potassium itself — the mineral inside is a little under 100 mg, in the same neighborhood as every other tablet and capsule here. Gluconate is the milder of the two common salts, this tablet is small and uncoated, and it can be chewed if swallowing is the issue, which is more than most of this group offers.

For a first bottle, or for someone who wants a low-stakes daily top-up and doesn't care about capsule counts, this is the one we point to. If potassium earns a place in your routine, you can graduate to a bigger citrate bottle later without feeling like you wasted much finding out.

The number that stops you is 1020 mg — roughly ten times what a standard potassium capsule carries, and about a fifth of a day's target in one go. Read the serving line before you plan around it, though: that's 1020 mg across two capsules, not one, with 120 servings in the bottle.

This is the bottle for a target somebody else set. If a clinician has told you to get several hundred milligrams a day from a supplement, the 99 mg capsules mean a small handful with every meal; this one gets you there in a single serving. Potassium bicarbonate is a different salt from citrate rather than a better one, and it's the version to look at when your reason for supplementing is specific rather than general.

The trade-offs are real. The capsules are big, and 510 mg in one capsule can sit harder than 99 mg does — we kept ours with a meal, and we don't take it on an empty stomach. It's also not a bottle to stack with other potassium products or to use without knowing where your kidney function stands, which is true of any potassium supplement but matters more at this dose.

A kilogram of white powder in a foil-lined resealable bag is a different proposition from a bottle of capsules, and it's the reason this one has a place here: you're buying the mineral rather than the packaging. It's pure potassium citrate with nothing added, and it dissolves in cold water, hot water, juice or a smoothie without clumping into grit at the bottom of the glass.

The catch is that you're the measuring device. Potassium is not a mineral to eyeball, and a heaped teaspoon is a very different dose from a level quarter teaspoon — so we treated it like a recipe ingredient, measured once and kept the scoop we use marked at the level we want. If that sounds like a chore, it is, and it's the reason capsules still exist.

Taste is the other dividing line. Stirred into a quart of water with a little juice it's barely there; on its own in a glass of water it reads salty, and some people never get past that. If you already make your own electrolyte drink, this is the most potassium for your money in this guide by a wide margin, and the taste disappears into whatever else is in the bottle. If you want to swallow something and be done, buy capsules.

Read the free-from list before the supplement facts. No unnecessary fillers or binders, no magnesium stearate, no common allergens, no GMOs — and for the shopper who scans excipient lists before buying anything, that's the entire reason this bottle belongs on the page.

The capsule itself is small and easy to swallow, and the potassium is in citrate form, so it behaves like the other citrate options here rather than doing anything novel. What you're paying for isn't a delivery system; it's the discipline in what didn't go into the capsule.

That discipline costs. This is the most expensive bottle per capsule in this group by a wide margin, with 180 capsules in it — the kind of premium you accept once and then wince at on the reorder.

If you already buy from the clean-label end of the supplement aisle, this is the potassium that matches everything else on your shelf, and it's a better fit for that shelf than a budget bottle you'll second-guess every time you open it. If you don't read excipient lists, the premium buys you nothing you'll notice.

Citrate and gluconate are the two names you'll see on most potassium bottles; this one uses a third thing. The mineral is bound to amino acids rather than a salt, a chelated form, which makes it the odd one out in this group — and that's the reason to look at it.

The capsules are small veg caps that go down easily, the dose is the standard 99 mg, and there are 200 of them in the bottle. Solaray makes them in a GMP-certified facility and tests in its own lab, and the bottle itself is molded from post-consumer recycled resin — a small thing we noticed and appreciated.

You pay for the chelated form. Cost per capsule runs higher than the bulk citrate bottles and the bottle holds fewer capsules, so at one a day it's fine and at three a day it adds up faster than the Nutricost or NOW bottles do.

For anyone who has done well on chelated minerals elsewhere and wants the same approach for potassium, this is a reasonable way to keep it consistent. For everyone else, the citrate bottles do the same job for less.