Adult son drinks a lot

My 29-year-old son is staying with us for the holiday. I know he’s an adult and gets to do whatever he wants, but I am concerned he drinks too much, and doesn’t seem to have interests other than food and alcohol. I know it’s my thoughts, but I worry about his health (he’s also gained a lot of weight). How do I talk to him about this, coming from a place of love, without it sounding like judgment?