Another name for pohormones are "designer steroids"
What you referred to are natural test boosters which are completely fine. They just increase your testes ability to pump out testosterone
Prohormones and steroids are substances that u put into your body, and your body turns them into testosterone. This is not completely fine because you can rape your natural test production and throw your body all out of wack if dun incorrecty. These substances also create way more test than naturally possible, and there are bad side effects from that as well such as male baldness, acne, cramps, anger issues associated with dominance. Your body will also be pumpin out estrogen to balance the increased test. This isnt always a problem while on cycle, but if not taken care of after cycle, it leads to permanent problems such as gynecomastia, infertility, thigs like that. Think of it like this. Once u stop the cycle, you'll have above naturals estro levels, and a very depleted natural test production. All bad for guys
The biggest differece between steroids and ph's is that steroids made the list of controlled substances and are therefor illegal to own
The fact that u have no idea what youre thinkig about puting into your body shows u are far from ready to use somthing as dangerous as a ph.
Im telling u all this as a warning to stay away from ph's untill uve experienced gains and cuts naturaly. U dont know your body well enough from a lifting perspective to succesfuly run a cycle. Get the lifting game down, get the diet game down. Do it several times, then you'll be ready. It takes most people about a year just to figure what routines they like/respond best to as well as learning proper form on the harder stuff. Then u need to master the diet game.
Ph's and steroids are for lifters that do this as a lifestyle rather than a hobby. That means we count calories and macros almost subconsciously. We build our daily schedule around the gym rather than finding time for the gym in our lives. We go out and buy the right food that takes time to cook, not the fast processed stuff