My friend in college smells really bad of sweat. I want to tell her, but I don’t want to offend her. I just think she deserves to know so she can change it because she probably isn’t even aware of it herself. Has anybody had a similar experience or what should I do?

I’d just tell them straight - it’s always going to be nicer coming from a friend rather than strangers making comments

Could you maybe bring up a deodorant that you use and like and how you handle personal hygiene?

Be upfront with her

As @Silly_Tilly_ said you can tell them straight up but you can do it kindly