Volek Phd, Rd And Stephen D. Web also the guideline to technically to be in ketosis requires that this measured ketone level be greater than.5 millimolar/l. Web ketones, or ketone bodies, are made by your liver from fat that you eat as well as from your own body fat. Web according to dr’s jeff s. Web When Your Body Reaches Ketosis On A Ketogenic Diet, It Uses Ketones As An Alternative Energy Source.