@suecreader Good morning No one really knows how much Potassium we need as we are all different in body weight ,but if you get a full panel of blood work in your minerals that should tell you if your low in a vit-min.Our bodies building blocks our minerals mostly ,calcium, magnesium , potassium those you can't get a quality amount in food even though the different food gives us all vit-min,some people need extra so supplement with a good Vit-Min.For Potassium they tell you to eat bananas Yes your body will let you know For me I take a Magnesium,Calcium,Vit D3,Vit K Potassium at night to prevent RLS .