HI, I Have Been Working Out For Several Years Now

HI, I have been working out for several years now and have been getting stronger all naturally. But I have not been able to see much mass gains or physically see myself getting bigger. Yes, I have gotten stronger (my weight has gone up as well as the weights I lift), but I see minimal results on my physical appearance. I spoke to someone who recommended a ProHormone, which is legally sold in supplement stores. I don't know if there are any negative risks to it. I have been researching it but I can't find any reliable source.