Test booster , are they not all just bullsh@t though ?
Nolva isn't an Aromatase Inhibitor. It is a Selective Estrogen Receptor Modulator. As is Clomid. They don't stop the conversion of Testosterone to Estrogen in the body, they decrease the Estrogen's effectiveness by blocking it's pathways of use.
You are correct about it being helpful in returning natural test levels to normal.
Arimidex is an AI.