> Potassium deficiency is very rare

Potassium-deficient diets are not rare. Using the U.S. as an example, only 3% of people in the U.S. consume adequate levels of potassium in their diet according to the most recent NHANES survey.[1] The U.S. Dietary Guidelines Advisory Committee has identified potassium as 1 of 4 "shortfall nutrients" (nutrients that are underconsumed by the U.S. population at large) that are of public health concern in 2015.[2] That is why the FDA has required food manufacturers to include potassium amounts in the "Nutrition Facts" label since 2016.[3]

[1] https://academic.oup.com/advances/article/4/3/368S/4591617

[2] https://nutritionj.biomedcentral.com/articles/10.1186/s12937...

[3] https://www.ift.org/news-and-publications/food-technology-ma...