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# Does Tea Stain Your Teeth?

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by

## Evgenia Katsiaris

on 27 May 2016

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#### Transcript of Does Tea Stain Your Teeth?

Hypothesis
If we put hollowed out eggs in containers of beverages such as Lipton Tea, coffee, and Coca cola then, the coffee will stain the egg the most.
Materials
Standard White Eggs
Thumbtack
3 containers with lids
Lipton Tea
Coca Cola
Coffee
Hot Water
Plastic Cups
Camera
Procedure
First, we had to get all our materials. Then we needed to hollow out 3 eggs and put each egg into a separate container and fill one container with coca cola, one with Lipton Tea, and one with coffee. Then we had to wait three days and record the results after each day.
Results
The Results of the first day for the coca cola egg: the egg was stained, the result for the coffee egg: it was stained more than the coca cola, the result for the tea egg: it was the egg with the least amount of stain on it.
The results of the second day was that the coffee had the darkest stain,and then the coca cola had made a medium stain and the tea had the least amount of stain.
The results of the third day was that the coffee still had the darkest stain, the coca cola had a medium stain and the Lipton tea still had the least amount of stain.
Conclusion
The conclusion of this experiment is that tea does stain your teeth but not as much as the other beverages ( coca cola, coffee) did, and coffee did stain the egg the most which makes our hypothesis correct.
Variables
Independent Variable: Types of Beverage

Dependent Variable: The amount of stain on the egg

Constants: The amount of beverage in the container, the eggs, the amount of time the eggs were in the containers
Scientific Background
"Pigments from dark-colored drinks such as coffee, tea, and soda can become embedded in those cracks and ridges and, if the proper steps are not taken, can cause permanent, yellowing stains on your teeth."
Coffee is acidic and can wear down the enamel in your teeth.
Tea contains Tannin an antioxidant that contains vegetable dye that clings onto plaque on your teeth
The dark color of coke stain your teeth overtime because it clings onto the surface of your teeth.