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Potassium

Also called potassium citrate, potassium chloride, potassium gluconate.

The best price per 200 mg potassium and per month, form by form, across 4 UK retailers, and where to buy it cheapest. A unit for comparing, not advice.

Comparing potassium

We count the potassium a label states per serving, whatever the pack size or the serving size, so every product sits on one scale. Potassium comes as citrate, chloride, gluconate and other forms, and each form has its own table, because someone buying one would not usually take another as a like-for-like substitute. Products that combine potassium with other ingredients are listed separately, because their price buys more than potassium. 200 mg is our unit for comparing prices, not a dose to take: the label’s directions and a pharmacist decide that.

Potassium Citrate

Prices last checked: . Ranked purely by price per 200 mg potassium — a comparison unit, not a recommendation. We earn commission when you buy through these links; it never affects the order.

Compared at 200 mg. Enter the amount you take to see your own costs.

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Potassium, Citrate: products ranked by price per 200 mg potassium
RankProductPer 200 mg potassiumPer monthLastsBuyHow it is worked out
1
Simply Supplements Potassium Citrate 1300mg with Vitamin C
Cheapest per dosePotassium Citrate 1300mg with Vitamin C180 tablets · 180 servings · 1.3 g a servingDetails and price historyAdd to my stackalso contains vitamin cTesting claimed on label
1p27p3.2 years£10.69View at Simply Supplements (opens in a new tab)Free delivery from £20.00, otherwise £1.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 180 ÷ 1 per serving = 180
  • In the pack: 180 × 1.3 g = 234 g
  • £10.69 ÷ 234 g × 200 mg = 0.914p per 200 mg citrate
  • With "compare by active content" on: 470.6 mg of potassium a serving = 2.52p per 200 mg potassium
  • Amount per serving: estimated from the compound weight using our conversion factor.
  • Also contains: vitamin c. The price counts the potassium only.
What the retailer's listing says
  • amount per serving “a high strength serving of 1300mg of highly bioavailable potassium citrate”

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2
WeightWorld Potassium Citrate With Vitamin C Tablets
Potassium Citrate With Vitamin C TabletsWeightWorld · 90 servings · 801 mg a servingDetails and price historyAdd to my stackalso contains vitamin c
5p£1.4612 months£17.49View at WeightWorld (opens in a new tab)Free delivery over £35.00, otherwise £1.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 90 (as stated on the label)
  • In the pack: 90 × 801 mg = 72.1 g
  • £17.49 ÷ 72.1 g × 200 mg = 4.85p per 200 mg
  • Amount per serving: stated on the label.
  • Also contains: vitamin c. The price counts the potassium only.
What the retailer's listing says
  • servings stated “Servings per Container: 90”
  • units per serving “Serving Size: 3 Tablets”
  • amount per serving “Active Potassium ; 801 mg”
  • compound mass “Potassium Citrate ; 2225 mg”

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3
NOW Foods Potassium Citrate - 99 mg
Best value under 6 months' supplyPotassium Citrate - 99 mgHealf · 180 capsules · 180 servings · 99 mg a servingDetails and price historyAdd to my stack
10p£2.863 months£8.49View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 180 ÷ 1 per serving = 180
  • In the pack: 180 × 99 mg = 17.8 g
  • £8.49 ÷ 17.8 g × 200 mg = 9.53p per 200 mg
  • Amount per serving: stated on the label.
What the retailer's listing says
  • pack units “180 caps”
  • servings stated “Servings Per Container: 180”
  • units per serving “Serving Size: 1 Veg Capsule”
  • amount per serving “Potassium (from 310 mg Potassium Citrate) ; 99 mg”
  • compound mass “from 310 mg Potassium Citrate”

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4
Pure Encapsulations Potassium (citrate)
Potassium (citrate)Healf · 90 capsules · 90 servings · 200 mg a servingDetails and price historyAdd to my stackclaimed: vegetarian
18p£5.293 months£15.86View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 90 ÷ 1 per serving = 90
  • In the pack: 90 × 200 mg = 18 g
  • £15.86 ÷ 18 g × 200 mg = 17.6p per 200 mg
  • Amount per serving: stated on the label.
What the retailer's listing says
  • pack units “90 caps”
  • servings stated “Servings Per Container: 90”
  • units per serving “Serving Size: 1 capsule”
  • amount per serving “Potassium (as Potassium Citrate) ; 200 mg”

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5
Pure Encapsulations Potassium Magnesium (citrate)
Potassium Magnesium (citrate)Healf · 180 capsules · 180 servings · 140 mg a servingDetails and price historyAdd to my stackalso contains magnesiumclaimed: vegetarian
24p£7.244 months£30.42View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 180 ÷ 1 per serving = 180
  • In the pack: 180 × 140 mg = 25.2 g
  • £30.42 ÷ 25.2 g × 200 mg = 24.1p per 200 mg
  • Amount per serving: stated on the label.
  • Also contains: magnesium. The price counts the potassium only.
What the retailer's listing says
  • pack units “180 caps”
  • servings stated “Servings Per Container: 180”
  • units per serving “Serving Size: 1 capsule”
  • amount per serving “Potassium (as Potassium Citrate) ; 140 mg”

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6
Thorne Potassium Citrate
Potassium CitrateHealf · 90 capsules · 90 servings · 99 mg a servingDetails and price historyAdd to my stack
30p£9.1045 days£13.52View at Healf (opens in a new tab)Free delivery over £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 90 ÷ 1 per serving = 90
  • In the pack: 90 × 99 mg = 8.91 g
  • £13.52 ÷ 8.91 g × 200 mg = 30.3p per 200 mg
  • Amount per serving: stated on the label.
What the retailer's listing says
  • pack units “90 caps”
  • servings stated “Servings Per Container: 90”
  • units per serving “Serving Size: 1 Capsule”
  • amount per serving “Potassium (as Potassium Citrate) ; 99 mg ; 5%”

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By shop

Each shop's potassium products, with where its cheapest sits in the market.

How we work out these prices

We count the elemental potassium a product provides, not the weight of the whole compound it comes in. If a label states the potassium amount, we use it. If it only gives the compound's weight, we estimate using a published conversion factor and mark the figure “estimated”. If we cannot tell which the number means, the product is left out until it can be confirmed.

Conversion factor used when only the compound weight is given: citrate 36.2%. How we chose these.

Questions

Where can I buy potassium cheapest in the UK?

On 20 October 2026, the cheapest potassium per dose from a UK seller was Potassium Citrate 1300mg with Vitamin C at Simply Supplements (3p per 200 mg potassium, 76p a month). Then Potassium Citrate With Vitamin C Tablets at WeightWorld (5p per 200 mg potassium, £1.46 a month) and Potassium Citrate - 99 mg at Healf (10p per 200 mg potassium, £2.86 a month). That is by price per 200 mg potassium, across 3 UK retailers and 6 products, with every price checked daily; the table above shows the working for each.

What is the best price per 200 mg potassium of potassium today?

3p per 200 mg potassium, for Potassium Citrate 1300mg with Vitamin C at Simply Supplements (3p per 200 mg potassium, 76p a month), on 20 October 2026. The dearest of the 6 products we price is 30p per 200 mg potassium, and the middle one is 14p.

How much does potassium cost per month?

At one 200 mg dose a day, the cheapest works out at 76p a month, for Potassium Citrate 1300mg with Vitamin C at Simply Supplements, on 20 October 2026. Across the 6 products we price it runs from 76p to £9.10 a month. A month is 30 days, and the figure follows the dose you enter in the table.

Which potassium form is cheapest per dose?

On 20 October 2026: citrate from 3p per 200 mg potassium (Simply Supplements), gluconate from 7p per 200 mg potassium (Myprotein), other forms from 52p per 200 mg potassium (Healf) and chloride from £1.16 per 200 mg potassium (Healf). The forms differ in what they contain, so this is a fact about price and not a recommendation of one over another.

Do bigger potassium packs cost less per dose?

Mostly, yes: on 20 October 2026, the 2 packs that last more than six months average 4p per 200 mg potassium, against 20p for the 4 that last six months or less. The table marks the cheapest pack that lasts six months or less as the best value for anyone who would rather not buy a year at once.

How long does a pack of potassium last?

At one 200 mg dose a day, the packs we price last from 45 days to 1.2 years; the middle one lasts 4 months. Each row says how long its pack lasts at the dose you enter.

What does “per 200 mg potassium” mean?

It is the unit we use to put every product on the same scale: the price of 200 mg of elemental potassium, whatever the pack size or serving size. It is a comparison unit, not a recommendation of how much to take. Use the “Your daily dose” box to see costs at the amount you actually take.

Why are the potassium forms in separate tables?

We only rank products against others of the same form, because someone buying one form would not usually see another as a like-for-like substitute on price. Forms we compare separately: Citrate; Chloride; Gluconate; Other forms.

Why is a product I have seen in the shops missing?

If a retailer’s listing does not let us confirm the amount per serving, the pack size or the form, we do not guess and we do not show the product. It appears once its label has been read and confirmed.

How up to date are the prices?

Prices on this page were last checked on 20 October 2026. Every table shows the date its prices were checked. Always confirm the price on the retailer’s site before buying.

Do retailers pay to appear higher?

No. We earn a commission when you buy through our links, but the order is set only by price per dose. No retailer or brand can pay for position.