I had a hard time finding an answer to this one: Do hormones that are created by the body get to stick around much in the body? What I mean by this is, are they just "one-use" items or do they last longer in the body and can be useful long-term too? For example, if we get angry, once we calm down, are those adrenaline molecules flushed out of our system in different ways, or do they get broken down (or not), reintegrated into the body and somehow get used again later when needed? In essence, what is a typical hormone longevity? I hope I made sense with this one. Many thanks for any thoughts!