Selecting the optimal potassium supplements.

Low levels of potassium, known as hypokalemia, can cause muscle cramps, weakness, fatigue, and other symptoms. While potassium supplements can help alleviate these symptoms, they cannot address the underlying causes of hypokalemia.

 The majority of potassium in the body is stored within cells. Blood potassium levels can provide insight into potassium status, but they do not reflect the potassium stores within the cells. Following a keto diet can increase the body's acidity, leading to a condition called metabolic acidosis (MA). This can result in kidney problems and a decrease in bone mineral density. A recent study from 2020 suggests that oral potassium citrate supplementation may reduce the risk of MA in children who follow a keto diet. 

The researchers propose that potassium citrate acts as an alkalizing agent to counteract the potential for MA. Further research is needed to determine if individuals on a keto diet should universally take a potassium citrate supplement. It is important to note that experiencing MA due to a keto diet is extremely rare in individuals without preexisting health conditions. 

 Most dietary supplements contain potassium salts, which are combinations of potassium and other elements. Commonly, dietary potassium supplements contain potassium chloride. However, some may contain alternative potassium salts. 

 Since different salts contain varying amounts of potassium, the supplement label should indicate the amount of pure, or elemental, potassium present. Multivitamins and mineral supplements that include potassium typically provide around 80 milligrams (mg) of elemental potassium.

 Potassium-only supplements may contain up to 99 mg of elemental potassium. As different supplements have different potassium levels, individuals should refer to the product labels to determine the appropriate dosage.