Do height pill work, what about pills for others thing?

I say this because I was in track my senior year an only lost one pound every 2 weeks and I was jogging on average 5 miles a day. What i'm trying to get at is that people say all these miracle pills don't work yet I tried some cheap diet pill recently(HYDROXYCUT) they were on the budget side I guess $29somethin and in 30 days went from 160 to 145 running on average 2 mile a day with a balanced diet. so it make me think do some of these pills work. If I were to get some height pills and put in the actual work like stretching, drinking tons of milk and other thing that promote bone health, jumping off high place and sprinting to create micro fracture, will the height pills be more of a help. What do you guys think and if you know of any legit height pills even if people claim they've only grown half and inch or so please tell me. By the way I’m 19 and will soon be 20 does that completely cancel me out, will I not be able to grow anymore?