Height increasing supplents will only make the manufacturer's profit grow. Nothing will effect your height but your own genetics. You don't want to get too tall or your knees will wear out when you are older and you'll have a miserable retirement limping around on your old worn out knee ligaments.

It is spelled "doubt" you illiterate fuck.

you spelt "doubt" wrong

start tying your legs to one bumper and arms to another and have the tow cars pull you gently apart, not until your limbs pop off but just until you begin screaming, then repeat, stretch, repeat, it will really boost your height.
thanks for listening.
also i hear drinking monkey jizz works well too.

thats hieght is good, and you grow to your 21

stop playing with your cock this should help it will also stop you from going blind

why the fuck so you want to be taller. ur height is perfectly fine. shallow mf

don't do it until you know when you're done growing!