The banana is considered the epitome of a potassium source. Hardly any top athlete goes without reaching for a banana after a competition. But from a nutrient density perspective, and especially from an ecological one, the banana myth is outdated. Switzerland offers a wealth of regional foods that provide significantly more potassium – and without long transport routes. A look at local superstars that supply our nerves and muscles at least as well.
Why potassium is essential for the body
Potassium is the most important intracellular mineral and essential for numerous vital functions. As the antagonist of sodium, it regulates fluid balance, acid-base balance, and is crucial for nerve impulse transmission and muscle contraction. .
The physiological significance of potassium is strikingly evident in the consequences of a deficiency: even mild deficiencies can lead to fatigue, muscle weakness, or cardiac arrhythmias. However, the modern Western diet is often low in potassium – a problem that can contribute to high blood pressure and cardiovascular disease. . Yet the solution would be so simple: It grows right on our doorstep.
The banana as a point of comparison – what's really in it?
Before we consider regional alternatives, it's worth taking a realistic look at bananas. A medium-sized banana (approx. 100 g) provides about 360–380 mg of potassium . That's a respectable amount – but by no means the top source it's often touted to be.
The Swiss nutrient database (Federal Food Code) and comparable official sources show numerous domestic products that significantly exceed this value. Furthermore, there is the environmental impact: while a banana travels an average of 8,000–10,000 kilometers by refrigerated ship and truck, regional alternatives often come directly from the field next door.
The local potassium kings
Here are the top-rated varieties from Swiss cultivation, sorted by their potassium content per 100 grams:
1. Dried apricots (Valais dried apricots)
By far the leading regional source of potassium. Dried apricots, especially the protected Valais varieties, contain an impressive 1,100–1,400 mg of potassium per 100 g – about three times as much as a banana .
They are also rich in beta-carotene (provitamin A) and iron. The drying process concentrates not only the flavors but also the minerals. Ideal as an energy source for hikes or as a snack between meals.
2. Dried figs
Although figs don't thrive in all parts of the country, they are a traditional cultural asset in Ticino and in sheltered locations. Dried figs contain approximately 680–900 mg of potassium per 100 g , exceeding bananas by two to three times.
3. Spinach
Swiss spinach, whether raw or cooked, is a true nutritional powerhouse. Raw spinach contains approximately 560 mg of potassium per 100 g , while cooked spinach contains up to 650 mg (the mineral becomes more concentrated due to weight loss). It also provides valuable iron, magnesium, and vitamin C.
4. Potatoes
The Swiss potato – often unfairly underestimated as a "filling side dish" – is an excellent source of potassium. With 410–450 mg per 100 g, it already surpasses bananas in potassium content. Potassium is optimally preserved when prepared gently (boiled or baked potatoes). This is a major reason why potatoes have a firm place in sports nutrition.
5. Kohlrabi
This often-overlooked root vegetable, which is in season in Switzerland from May to October, contains about 400 mg of potassium per 100 g , putting it just above bananas. Kohlrabi also scores points for its high vitamin C content and easy digestibility – it's a treat even when eaten raw as a snack.
6. Fennel
Fennel bulbs grown in Switzerland contain approximately 390–400 mg of potassium per 100 g . This crisp vegetable also boasts essential oils that aid digestion and a high folic acid content.
7. Beetroot (Red Beet)
The classic Swiss beetroot is not only a local superfood, but also a reliable source of potassium, containing approximately 380 mg per 100 g . The root vegetable also boasts blood pressure-regulating nitrates and valuable antioxidants.
8. Wholegrain bread (Swiss rye bread)
A good Swiss whole-grain rye bread contains about 250–300 mg of potassium per 100 g – less than a banana, but due to the large volume consumed, it is one of the most important sources of potassium in the daily diet. Eating two slices (approx. 100 g) provides a similar amount to eating a banana.
Better potassium utilization: Preparation makes the difference
Potassium is water-soluble and sensitive to heat. To retain as much of the mineral as possible, the following are recommended:
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Cooking whole (boiled potatoes, beets in the oven)
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Steaming instead of boiling (prevents transfer into the cooking water)
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Reuse the cooking water (for soups or sauces) – this is where the leached potassium collects.
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Raw consumption (for spinach, kohlrabi, fennel)
Conclusion
Bananas are by no means "unhealthy," but from a Swiss perspective, they are neither the best source of potassium nor the most ecologically sound choice. Dried apricots from Valais, spinach from the Rhine Valley, or potatoes from the organic farm next door not only provide more potassium per bite, but also protect the climate thanks to shorter transport routes.
Anyone who wants to optimally support their nerves and muscles will find the concentrated power of minerals right on their doorstep – and at the same time do something good for the environment.
Official sources & studies:
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Frontiers in Physiology: Potassium: From Physiology to Clinical Implications (2023)
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Federal Office for Food Safety and Veterinary Affairs (BLV): Swiss nutrient database (last updated 2024)
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Agroscope: Nutrient content in Swiss vegetable varieties (publication series "Swiss Food Table")
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USDA FoodData Central: Nutritional comparison of bananas vs. dried fruit
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Federal Statistical Office: Swiss agricultural statistics 2024 (cultivated areas and certificates of origin)
