cyp half life is around 5 or 6 days, and stays in your system for a while, theres no reason to be doing EOD injections with it.prop and suspension is a whole nother story because there esters work almost double as quick and the half life is shorter, so basically EOD on cyp/enanthate is a waste of time and needles.just stick it every 5 or 6 days and your good to go.