Hangovers are the body's adverse reaction
High risk groups:
Students who stay up late at night (7/10)
Students who are extremely stressed (8/10)
Students who are party goers (risk factor 9/10)
Students who are already addicted to alcohol before enrolment (9/10)
Switching to alternatives:
Offering counselling sessions where students can gather, cry out and discuss together for emotional support
Promoting healthier and affordable drink options on campus
Promoting exercise rooms
Allowing emotional support animals for individuals
Restricting parties and setting rule limit.
By making them exercise more often
Yes, there is a variety of things you can do to wear down the enamel. A few of the biggest things are: Drinking Coffee or soda, eating acidic foods and not brushing your teeth. Sadly you are not able to grow back your enamel after if it fully gone so it's best to protect your enamel as much as possible.
All you can do is pray. Also talk to the person more and become their mentor and keep in touch with them