Would increasing my HGH levels help me grow taller at age 19?

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I don't have any exogenous HGH to inject myself with -- however I have read that you can increase your natural HGH levels by up to 1250% just through fasting.

https://intensivedietarymanagement.com/fasting-and-growth-hormone-physiology-part-3/

By performing a 21 day fast I will raise my HGH levels and lower my insulin levels.

But is HGH the only thing that determines your height or will fasting stunt my chances of growing (if I have any more chances to grow)?

I'm not sure if my growth plates are closed.

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No... plus your growth plates are mainly located in your long bones. At best just go get an x-ray.

Spoiler Alert though, they are probably closed..

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Fasting and HGH? Never heard about that

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How old are you? If your growth plates are still open its possible. Idk about boosting it 1250% but I have heard of fasting boosting hgh levels someone in my one of my classes was doing it idk if it works but I doubt it would work that much.

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Go to an endocrinologist, they'll take an X-Ray of your hand or knee and tell you if your growth plates are open or fused.