Some people say "try to limit the coffee you drink because it can stain your teeth!"
Hold on a second! I LOVE COFFEE!
Here's what we need to know...
Coffee contains ingredients called tannins, which cause color compounds to stick to your teeth. When these compounds stick, they can leave an unwanted yellow hue behind. It only takes one cup of coffee a day to cause stained teeth!
Healthline recommends drinking coffee in one sitting instead of small sips throughout the day to prevent bacteria buildup. Additionally, drinking a glass of water after finishing your coffee to rinse your mouth and teeth. This will flush away some of the acidic coffee and bring your teeth and gums back to a neutral pH level.
Coffee can also cause bad breath, or halitosis, because it sticks to the tongue. To avoid these problems, eat food before you drink coffee, and use a tongue scraper and toothbrush after you finish drinking.
Remember, coffee is acidic. Brushing your teeth IMMEDIATELY after eating or drinking anything acidic WEAKENS tooth enamel and causes staining.
Eating certain foods might also help remedy stains. Raw fruits and vegetables — like strawberries and lemons — contain natural fibers that can clean teeth by breaking down bacteria. However, fruits naturally have sugars, which as we all know, are NOT good for your teeth! Use water to rinse and you can brush approximately 30 minutes after eating.
Info from Healthline.com https://www.healthline.com/health/dental-and-oral-health/what-does-coffee-do-to-your-teeth#prevention