If your injail w a heroin addiction what can help, wat food, etc?

Answer 1

If someone is incarcerated and they truly are a herion addict, s/he needs to tell the officials/the lawyer/someone immediately. In Western countries, they will provide correct medical detoxing for the person. Sudden quitting after long-term or very regular use can be dangerous, even fatal.

Answer 2

Your friend needs to approach the jail welfare officer or nurse. If they are in jail I am sure the jail is aware that they are struggling with heroin withdrawal. Healthy food as much as possible, but the main thing is plenty of fluids and rest.