The space food keeps you healthy while you are in space.

Man has to take food in space to eat. This food is nutritious and allows the person to stay healthy.

what astronauts do to keep their mouth healthy is to brush their teeth obviously (and what do suits have to do with your mouth) NOTHING!

healthy food or grinned up food

Most socially healthy people do have access to clean water and adequate living space. Most also make an effort to recycle on a weekly basis.