Contains pure potassium in the form of potassium citrate. Potassium citrate 300 mg. Potassium supports the function of the muscular system. potassium 1676 mg. Potassium citrate incl Conclusion: Potassium, of which fruits and vegetables are a major source, plays a key role in blood pressure regulation, bone health and kidney function, and improving its intake relative to sodium can provide significant health benefits.