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Potassium-40 (40 K) is a radioactive isotope of potassium which has a long half-life of 1.25 billion years. It makes up about 0.012% (120 ppm ) of the total amount of potassium found in nature. Potassium-40 undergoes three types of radioactive decay .
Potassium is a chemical element; it has symbol K (from Neo-Latin kalium) and atomic number 19. It is a silvery white metal that is soft enough to easily cut with a knife. [9] Potassium metal reacts rapidly with atmospheric oxygen to form flaky white potassium peroxide in only seconds of exposure.
Other foods rich in potassium (and therefore in 40 K) include potatoes, kidney beans, sunflower seeds, and nuts. [16] [17] Brazil nuts in particular (in addition to being rich in 40 K) may also contain significant amounts of radium, which have been measured at up to 444 Bq/kg (12 nCi/kg). [18] [19] Tobacco contains traces of thorium, polonium ...
Here are 20 potassium-rich foods: Bananas “One banana provides about 10 to 15% of the daily value and also packs magnesium and vitamin B6, other nutrients that support healthy muscle and nerve ...
The foods within the bland diet are lower in fiber and fat, while also having a more neutral flavor and smell. These include:, Lean proteins prepared with little to no fat and with mild seasoning.
“The DASH diet is heart-healthy and is rich in foods that have a high content of calcium, magnesium, potassium, protein, and fiber,” explains Marwah Abdalla, M.D., M.P.H., a cardiologist at ...
As with all living things, potassium-containing bananas emit radioactivity at low levels occurring naturally from the potassium-40 (K-40) isotope. [140] The banana equivalent dose of radiation was developed in 1995 as a simple teaching-tool to educate the public about the natural, small amount of K-40 radiation occurring in everyone and in ...
For U.S. food and dietary supplement labeling purposes, the amount in a serving is expressed as a percent of Daily Value (%DV). For potassium labeling purposes, 100% of the Daily Value was 3500 mg, but as of May 2016, it has been revised to 4700 mg. [29] [30] A table of the old and new adult Daily Values is provided at Reference Daily Intake.