Vitamins do not provide a good source of potassium. This is because potassium is a mineral, not a vitamin. Both vitamins and minerals are essential nutrients for a healthy, functioning body, according to SF Gate.
Potassium is sometimes confused with vitamin K, which helps blood to clot in the body and plays a role in bone health. Potassium helps to maintain normal blood pressure levels by counteracting the effects of sodium. It also helps muscles to contract and aids healthy digestion, states SF Gate. Potassium is found in many foods, and so deficiency is usually caused by other health problems or poor diet. Potassium supplements are available for those suffering from a potassium deficiency, reports WebMD.