This mineral helps keep your heart beating regularly. The British Medical Journal says taking potassium supplements might help lower blood pressure, but only by a small amount and further research is needed.
Reducing blood pressure lowers the risk of stroke, heart disease, heart failure and kidney disease.
3500mg is the UK reference nutrient intake (RNI) of potassium for adults. Many foods contain potassium, so a deficiency is rarely caused by an inadequate diet. Potassium-rich foods include many fruits and vegetables, milk, meat and whole grains.