All nutrient values are per 100g or 100ml. Source: USDA FoodData Central.
Potassium is a critical mineral for blood pressure regulation, fluid balance, and muscle contractions. Yet it is among the most under-consumed nutrients — fewer than 2% of Americans meet the adequate intake. The reason is straightforward: potassium-rich foods are primarily fruits, vegetables, and legumes, and Americans don't eat enough of them.
We analyzed 1.84 million food products with potassium data from the USDA FoodData Central database. The relationship between potassium and processing is clear: minimally processed plant foods are the dominant potassium sources.
Top 20 Highest Potassium Foods
Products ranked by potassium content per 100g, with processing scores.
Do high-potassium foods mean more processing?
Potassium and processing have a distinctly inverse relationship. The highest potassium foods — dried fruits, tomato paste, potatoes, legumes, and leafy greens — are minimally processed plant foods. Ultra-processed foods, despite often containing potato or tomato ingredients, typically deliver less potassium per 100g than their whole food counterparts.
Processing affects potassium in several ways: water addition dilutes concentration, and leaching during canning or boiling reduces potassium content. Dried and concentrated foods (tomato paste, dried fruits, potato flakes) show the highest per-100g values.
The potassium shortfall in American diets correlates strongly with low intake of minimally processed fruits, vegetables, and legumes — precisely the foods our processing analysis highlights as beneficial.
Top 5 potassium products, in detail
CREAMY HOMESTYLE TASTE INSTANT MASHED POTATOES, CREAMY HOMESTYLE TASTE
INSTANT MASHED POTATOES
MASHED INSTANT POTATOES, MASHED
ORIGINAL FLAVOR MASHED POTATOES, ORIGINAL
ORIGINAL INSTANT MASHED POTATOES
Best low-processing potassium options
These products combine high potassium content with minimal processing (Level 1-2 only). Proof that you don't need ultra-processed products to get excellent potassium.
Potassium by food category
Average potassium content and processing scores across food categories.
How much potassium do you need daily?
The adequate intake (AI) for potassium is 2,600mg/day for women and 3,400mg/day for men. The average American consumes only about 2,500mg — and fewer than 2% meet the adequate intake. Unlike sodium (where less is better), most people need significantly more potassium in their diets.
- 1Dried fruits (apricots, raisins, prunes) are among the most potassium-dense foods at Level 1 processing
- 2Potatoes (with skin) deliver 400-500mg potassium per medium potato at Level 1 — one of the most accessible sources
- 3Cooking method matters: boiling potatoes in water leaches potassium; baking, roasting, or microwaving retains more
- 4Bananas get all the credit (358mg per medium banana) but sweet potatoes, white beans, and spinach deliver more potassium per 100g
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Frequently asked questions
What foods are highest in potassium?
Dried fruits (apricots, raisins), tomato paste, potatoes (with skin), white beans, spinach, and avocados are among the highest. Dried and concentrated foods show the highest per-100g values because water has been removed.
Do I need to worry about getting enough potassium?
Likely yes — fewer than 2% of Americans meet the adequate intake of 2,600-3,400mg/day. Potassium deficiency is linked to high blood pressure, kidney stones, and bone loss. Increasing fruit, vegetable, and legume intake is the most effective strategy.
Is potassium from supplements the same as from food?
Over-the-counter potassium supplements are limited to 99mg per dose (less than 3% of the AI) due to safety concerns. Food-based potassium is both safer and more effective. A single medium potato provides 4-5x more potassium than a supplement pill.