A doctor friend of mine says she sees a lot of problems from people who are advised to cut down on salt, and go for salt substitute, so that instead of having too much sodium, they now have too much potassium.

MrsD, any opinion about using a mixture of salt and low-sodium salt (sodium and potassium) in homemade electrolyte drinks? My cardiologist has told me to drink 3l of water every day and get a lot of salt, but he wasn't interested in going into details. Most commercial electrolyte drinks contain a bit of potassium.