my initial thoughts

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Hello, I am new here. I got here due to my so long ambition of increasing my height.

I am 18 years old. My goal is ~190 cm.

Since I am young... should I try something other than LL to increase my height first ? My family, brother/father/mother all grew after 18 years old so I could be lucky too. I heard supplements vitamins , gym/stretching helps. I have even heard of the use of other chemicals but I dont remember.

I think some years ago a doctor took a measurement of me on a stadio-meter and it showed 179cm.
These days I have drawn a ruler on the wall, and I measured my self I think 180cm in the afternoon.

What are my options to reach 190cm from 180cm ? ( 188cm is cool too for me )

( P.S. What my family told me was that , around my age they were growing very slowly and then suddenly a growth spurt occurred )

By the way I have a terrible posture so I should also fix that too but I dont know how.

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So 8cm in one operation that sounds good. Hopefully I will be at least 182 by then tho. Is there anything I can do to make the most out of my possible growth? Also how to fix my terrible posture? I could be taller and I wouldnt know