What are the benefits of Potassium Tablets? Potassium is a mineral that plays a vital role in maintaining normal blood pressure,3 helping you to feel fit and ready to take on whatever your busy schedule throws at you. It’s also one of the body’s essential electrolytes, which provide the electrical energy necessary for many vital functions in the body. Supporting muscle function1 and the nervous system2 — so you can give your all during training. 1. Potassium contributes to normal muscle function. 2. Potassium contributes to the normal function of the nervous system. 3. Potassium contributes to the maintenance of normal blood pressure.