Hi, I am in the process of applying for Engineering Technician SM. I have my medical in a few weeks, I have been doing the lighterlife diet to lose weight. I used to be 16.8 stones now im 11.8 stones. Im wondering if the presence of keytones in my urine will affect my application. The keytones are a result of only having 500 calories per day and my body being in ketosis. Any help is much appreciated.