Potassium helps control fluid balance, supports normal heart function and offsets some of sodium's effect on blood pressure. Most adults should aim for about 3,500 mg a day (the WHO says at least 3,510 mg). Beans, leafy greens, pumpkin, fish, yogurt, potatoes and fruit such as bananas and dried apricots are the easiest sources.
Key takeaways
- Potassium helps regulate fluid balance and heart function, and works against sodium's effect on blood pressure.
- WHO, TÜBER and the NHS put the adult target at about 3,500 mg a day; the US sets 3,400 mg for men and 2,600 mg for women.
- Cooked beans, spinach and pumpkin each beat a banana per portion, and many top sources are low in calories.
- A day of yogurt, beans, vegetables, fruit and fish can pass 4,000 mg in about 1,130 kcal of food.
- People with kidney disease or on certain medicines should check with a doctor before raising potassium or using supplements.
What does potassium do in your body?
Potassium is a mineral and one of the body's main electrolytes. According to the NHS, it helps control the balance of fluids in the body and helps the heart muscle work properly. It also works as a partner to sodium: the two minerals sit on opposite sides of your cell membranes, and the balance between them matters for nerves, muscles and blood pressure.
That partnership is why potassium shows up in public health advice at all. The WHO notes that potassium can mitigate the negative effects of high sodium intake on blood pressure. Most people eat more salt than recommended and less potassium, so the advice runs in both directions: a little less salt, a lot more of the foods that naturally carry potassium.
How much potassium do you need per day?
Different health bodies set slightly different reference values, but they land in the same neighbourhood for healthy adults:
| Source | Adults, per day |
|---|---|
| WHO | At least 3,510 mg (90 mmol) |
| Türkiye Beslenme Rehberi (TÜBER 2022) | 3,500 mg |
| NHS (ages 19–64) | 3,500 mg |
| US Dietary Guidelines (Adequate Intake) | 3,400 mg (men), 2,600 mg (women) |
These are targets to reach, not limits to stay under. For most healthy adults, aiming for roughly 3,000–3,500 mg a day from food is a sensible working number. The NHS adds that adults should be able to get what they need from a varied, balanced diet, without supplements.
Do most people get enough potassium?
Often not. The US Dietary Guidelines list potassium, together with calcium, dietary fibre and vitamin D, as a "dietary component of public health concern" because so many people fall short. Türkiye's own nutrition guide reaches a similar conclusion: in the national survey data summarised in TÜBER 2022, the share of people eating potassium at or above the adequate intake was very low.
The reason is simple. Potassium is concentrated in vegetables, fruit, legumes, dairy and fish, and diets built around white bread, rice, pasta and processed snacks carry very little of it. According to TÜBER's tables, 50 g of white bread provides about 63 mg of potassium and 90 g of cooked white rice only about 17 mg, against a target of around 3,500 mg.
Which foods are richest in potassium?
The table below uses the standard portions from TÜBER 2022's food composition tables, so the amounts are realistic servings rather than 100 g lab samples. Values change with variety, ripeness and cooking method, so treat them as good estimates.
| Food (standard portion) | Potassium | Energy |
|---|---|---|
| Dry white beans, cooked (130 g) | 789 mg | 156 kcal |
| Spinach, cooked (150 g) | 590 mg | 29 kcal |
| Pumpkin, cooked (150 g) | 575 mg | 37 kcal |
| Trout, cooked (150 g) | 536 mg | 184 kcal |
| Dried apricots (30 g) | 496 mg | 75 kcal |
| Salmon, cooked (150 g) | 494 mg | 228 kcal |
| Carrots (150 g) | 485 mg | 65 kcal |
| Broccoli, cooked (150 g) | 447 mg | 35 kcal |
| Kiwi (150 g) | 443 mg | 91 kcal |
| Banana (100 g) | 393 mg | 95 kcal |
| Yogurt, whole (240 g) | 384 mg | 158 kcal |
| Chickpeas, cooked (130 g) | 373 mg | 148 kcal |
| Tomato (150 g) | 363 mg | 26 kcal |
| Lentils, cooked (130 g) | 339 mg | 150 kcal |
| Potato, cooked (90 g) | 300 mg | 62 kcal |
Two things stand out. First, the banana is famous for potassium, but a portion of cooked beans, spinach or pumpkin beats it. Second, many of the richest sources are also among the lowest in calories: cooked spinach delivers about 590 mg for under 30 kcal. That makes potassium one of the easier nutrients to improve while eating in a calorie deficit.
What does a 3,500 mg potassium day look like?
Here is one ordinary day built only from the TÜBER portions above, before cooking oil, bread or extras are added:
| Meal | Foods | Potassium | Energy |
|---|---|---|---|
| Breakfast | Whole yogurt (240 g), banana (100 g), almonds (30 g) | 1,028 mg | 424 kcal |
| Lunch | Cooked white beans (130 g), tomato (150 g), white bread (50 g) | 1,215 mg | 310 kcal |
| Snack | Dried apricots (30 g) | 496 mg | 75 kcal |
| Dinner | Salmon (150 g), cooked spinach (150 g), potato (90 g) | 1,384 mg | 319 kcal |
| Total | 4,123 mg | 1,128 kcal |
That clears every reference value in the first table using about 1,130 kcal of food, leaving plenty of room for the rest of your day. Notice that the white bread adds only 63 mg; almost all of the potassium comes from the beans, vegetables, fruit, dairy and fish.
Which Turkish dishes are naturally rich in potassium?
Turkish home cooking is built on exactly the foods in the table. A few everyday examples:
- Legume dishes: white bean stew, chickpea stew and red lentil soup. Our guide to lentils, chickpeas and beans compares them side by side.
- Olive-oil vegetable dishes: green beans, spinach, leeks and courgettes cooked in olive oil.
- Yogurt and ayran: TÜBER lists 298 mg of potassium in a 350 g serving of ayran.
- Fruit and dried fruit: apricots, figs, melon and oranges. TÜBER gives 464 mg for 150 g of melon and 325 mg for 30 g of dried figs.
Sporty's catalog estimates focus on calories and macros, so when you log a bowl of lentil soup the app shows its energy and protein, not its potassium. A simple habit covers the rest: include a vegetable, fruit or legume at every meal.
How do potassium and salt work together?
The WHO recommends that adults eat less than 5 g of salt (2 g of sodium) a day and at least 3,510 mg of potassium, and it points to fresh fruit and vegetables as the way to raise potassium intake. In practice the two goals support each other: meals built around vegetables and legumes tend to be lower in salt than meals built around processed meat, packaged snacks and salty sauces. Our article on salt and sodium limits shows where hidden salt comes from.
Can you get too much potassium?
From food, it is unusual for healthy adults, because healthy kidneys remove the excess. Supplements are a different matter. The NHS notes that taking too much potassium can cause stomach pain, nausea and diarrhoea, that 3,700 mg or less a day from supplements is unlikely to have obvious harmful effects, and that older people, whose kidneys may clear potassium less well, should not take potassium supplements unless a doctor advises it.
Some people need to be careful even with food. If you have kidney disease, take medicines that affect potassium (some blood pressure and heart medicines, for example) or are thinking about using a potassium-based salt substitute, talk to your doctor or a registered dietitian before increasing your intake. This article is general information, not medical advice.
Does potassium help with weight loss?
Not directly. Potassium does not burn fat, and no amount of bananas will create a calorie deficit. The connection is indirect but useful: the foods richest in potassium are mostly vegetables, fruit, legumes and plain dairy, which are filling for relatively few calories. Shifting a meal from refined starches towards those foods can help with both goals at once. If you track your meals with Sporty, a quick check of how many of them contain a vegetable or legume is an easy way to spot gaps.
Frequently asked questions
How much potassium should I eat per day?
Most guidelines put adults at about 3,500 mg a day; the WHO says at least 3,510 mg. US reference values are 3,400 mg for men and 2,600 mg for women.
Is a banana the best source of potassium?
No. A 100 g banana has about 393 mg, while a portion of cooked white beans has about 789 mg and cooked spinach about 590 mg, according to TÜBER 2022.
Should I take a potassium supplement?
Most healthy adults can get enough from food. The NHS advises older people not to take potassium supplements unless a doctor recommends them, and anyone with kidney disease should ask a doctor first.
Does potassium lower blood pressure?
The WHO notes that potassium can mitigate the effect of high sodium intake on blood pressure. Eating more vegetables and fruit while cutting salt supports both goals.
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This article is general information, not medical advice. If you have a health condition, are pregnant or under 18, talk to a doctor or registered dietitian before changing your diet.