If you need less you will know about that as you will have high steroid symptoms - feel agitated, bloated, be constipated, have palpitations, not be able able to sleep etc (do an online search for more
info). Remember you are taking replacement medication as you cannot produce the hormone cortisol. So the manufactured cortisone is doing the job for you. If your dose is as correct as you can manage (everyone is different) you should have very few body damaging symptoms.