The roles of other electrolytes

In a previous blog we discussed what electrolytes are and what sodium is. We also discussed the role of sodium in a little more detail. In this blog you can find a very brief overview of some other electrolytes and their roles. Sodium and potassium are the main electrolytes in the extra-and intracellular spaces in the body respectively (fluids outside cells, for example in the blood, or inside cells (muscle cells, brain cells, etc.)). Below we will briefly discuss the role of other electrolytes. So let’s first talk about potassium:

Sodium, potassium and chloride infographic


Potassium is another electrolyte that has a really important role and is heavily regulated. Its main role in the body is to help maintain normal levels of fluid inside our cells. Potassium also helps muscles to contract, supports normal blood pressure and plays a key role in the conduction of nerve impulses. Hyperkalaemia (high potassium levels) can cause arrhythmias and cardiac arrests, but is extremely rare in otherwise healthy people.


Iron has the strongest evidence of all electrolytes. There is a clear relationship between iron deficiency and poor performance that can be restored by supplementing iron. Iron deficiency is not so easy to detect, but happens fairly regularly, especially in female athletes or athletes who restrict their food intake for longer periods of time. We discussed this topic in more detail in previous blogs. So, we refer the reader to: