I am 15year old and have 5.1'feet height and want to increase height how can i?

I'm afraid there is nothing other than standing up really straight,or you could wear shoes with a bit of a heel......................

You can't increase height within 1 week because height increasing is a long term process, but you usally grow a lot taller before puberty if you play sports like basketball or swimming. Or try shoe lifts if you want instant result, but you don't see why you need them as you are still really young.

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