Correct me if I'm wrong, but it's my understanding that both of these can be considered prohormones to Mestanolone. The One becomes Mestanolone when it reaches the acid of the stomache, and Protodrol becomes Mestanolone when the body creates a 3-ketone in vivo. My question would be, based on user feedback, which one is closer to mestanolone in practice? Which has a better conversion rate so to speak.