Hi, Ketone bodies are byproducts of fat metabolism due to carbohydrates deficiency secondary to reduced intake or due to insulin problems. It is commonly seen in diabetes mellitus, starvation, excessive vomiting, strenuous exercise and mal-absorption. If you are on a diet, and have removed carbohydrates from your diet, then the fat metabolism could have given rise to ketone bodies. Normally measurable amounts of ketone bodies are not seen in urine, so when it appears, importantly diabetes mellitus needs to be ruled out. Other causes based on history can be evaluated with relevant investigations. Potassium deficiency is also secondary to low carbohydrate diet. Improve your diet and try to maintain a balance between nutrition and exercise. Any further queries, happy to help again.