im 5'7" and need to grow taller?!

Eating nutritional foods will help your body grow to its full potential.
Stretching:
Lay on your back and arms straight out over head. toes pointed straight up. stretch through your heals and arms. do both arms and legs then each side.
on your back hugs your knees up to your chest. roll side to side and front and back and whatever feels good for your back.
there are many great techniques.
eat right and stretch that is the way to give your body a healthy environment and ability to grow.
If you wanna take something natural along with the stuff above, try this Helpo Growth Formula personally i took it and worked for me about 2 inches.

Any further height growth from 15-21 is likely to be insignificant but there are exceptions such as late bloomers who often grow late.

u cant make yourself grow, other than eating a well-balanced diet. there is no pill to make you shoot up two inches. it has been said that you stop growing 2 years after your period started.