Low Potassium Diet FAQ What is a low potassium diet? Learn more. Why should I follow a low potassium diet? Learn more. What foods should I avoid on a low potassium diet? Learn more. Can I still eat fruits and vegetables on a low potassium diet? Learn more. Are there any substitutes for high-potassium ingredients? Learn more. How can I ensure I’m getting enough nutrients on a low potassium diet? Learn more.