How can I slow or stop hair loss?

I am 19 and the doc says I’m losing my hair. Loss of hair, you could eat healthy and excersizing postpone or interrupt? I was drinking and smoking quite heavily over the weekend, could have been part of the problem, and also there are some vitamins that should focus on how to get into my system to reduce the loss? There are all the products in the long term we can take to prevent hair loss futuro.Sto looking pills that work, are there? I know there are a lot of questions but any help would be appreciated. Thank you.

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