Hmmm...... I have been on a keto diet for a while and noticed the same thing and figured that my body was just using up everything I ate. I eat two small salad's every day and figured that was enough? I eat 2 eggs in the morning, a quarter chicken (white) with skin and two side salad's for lunch, and some sort of meat at night "whatever the wife cooks". Is it possible that my body just doesn't have anything to excrete? I drink enough water for my pee to be clear and I dookie about every three days. Sorry, I just had to use the word "dookie" in a sentence.