binge,

These things are harmful for your teeth

Drinking Coffee

Coffee's dark color and acidity can cause yellowing of the teeth over time. Fortunately, it's one of the easiest stains to treat with various whitening methods. Talk to your dentist if you're concerned about discoloration of your teeth.
Soda

Candy isn't the only culprit when it comes to added sugar. Sodas can have up to 11 teaspoons of sugar per serving. To add insult to injury, sodas also contain phosphoric and citric acids, which eat away at tooth enamel. Diet soft drinks let you skip the sugar, but they may have even more acid in the form of the artificial sweeteners.

Drinking White Wine

You might think sticking to white wine would spare your teeth. But the acids still weaken the enamel, leaving the teeth porous and vulnerable to staining from other beverages, such as coffee. Swishing with water after drinking or using toothpaste with a mild whitening agent can fight the staining effects of red and white wines.
Binge Eating

Binge eating often involves excessive amounts of sweets, which can lead to tooth decay. Binging and purging (bulimia nervosa) can do even more damage to dental health. The strong acids found in vomit can erode teeth, making them brittle and weak. These acids also cause bad breath. Bulimia can lead to a variety of serious health problems, so be sure to talk to your doctor if you have been purging.
bananas,

Calcium is very important nutrient

bananasCalcium is very important nutrient. It helps perform several functions such as making our bones and teeth stronger, clotting blood, etc. Therefore, it is essential that we do not let its levels dip. In order to get more calcium, include these in your diet:
Dairy products – Now you understand the importance of having a glass of milk! Milk and its products such as curd, cheese, etc are rich in calcium and can prevent your bones from getting brittle.
Nuts – Nuts like almonds, groundnuts, etc prevent the loss of calcium from our body. Have a handful of them every morning or as a snack to beat hunger pangs.
Bananas – They are rich in several nutrients including calcium. Eat them in the morning or before a workout. Also eat citrus fruits which help in the absorption of calcium in our body.