Actually one of the hormones in Superthrive is called 1-NAA. It promotes stretching. Which is one reason a lot of people suggest that this stuff is great for cloning, seedlings and vegging, but when flowering rolls around to back off. That said many people swear by it for all those applications, but very few suggest using it during flower.

Also was suggested that you can do about the same thing with B1 vitamins (which is Thiamin) without the stretching that the 1-NAA hormone promotes and can be bought at the health food store for way less money.