From reading many many posts and the previous replies to your question it seems that as long as you are even at the trace level you are fine. I have been heavy into experimental pee chemistry the last few days and i go up and down the whole range from trace to dark purple. I find that eating more fat will make me more purple but that does not necessarily mean I lose more weight. I have heard that an excess of dietary fat will be eliminated in the urine and can influence the ketosis sticks. A lot of people don't even bother with the sticks figure they are just a waste of time and money as long as they are losing weight why bother