There have been a lot of ways to prevent bad breath including doing brush teeth twice a day, brushing or scraping tongue, using a mouth rinse,
https://gomedii.com/blogs/english/wp-login.php?action=logout&redirect_to=https%3A%2F%2Fgomedii.com%2Fblogs%2Fenglish%2F&_wpnonce=020393a18f
BBrushing teeth