I want to add 3-4 inches more to my height! how i can do so? please tell me diet to increase height at 18?

Unlikely to happen: By 18 most males are at the end of their linear growth ; their growth centers are closing.An x-ray of the left wrist and hand can be arranged and will show if your growth centers still l show more potential.If you entered puberty late and have a bone maturity more like a 15 yo you may get 2 inches.If your growth centers are closed, you are done.You will need to accept your height as it is.