Hello, those that produce chemicals etc., are temporary as in the production of it is not a sustained permanent thing, but the effects they cause can be permanent changes, like new dendrite spikes, neuron growth, muscle growth etc. Like the height growth, if you get taller, you are not going to get shorter when you stop. If you increase testosterone and it causes muscle growth etc., those things should remain.
But you wont be producing a sustained massive amount for the rest of your life (but it does help recover the production level to around peak health) So just apply a bit of logic with the descriptions.
Cholesterol and Plaque can be broken up and removed, and that is permanent. But it gonna build back up if you consume the things that built it up in the first place.
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