Actually, I don't know if I'm naturally yellow or not, but my teeth rot very easily. They say that the teeth themselves are prone to corrosion.
Since I got braces, my teeth are really turning golden...!!! When I paid 550,000 won to get my teeth whitened once, I did it 2 times and 3 times, for a total of 5 times, and the result was one level brighter. And even though I don't drink coffee, I often eat spicy food, so it quickly turns yellow again... It would be great if my teeth were white and pretty, but I guess I'll have to give up haha These days, I'm using a pink toothpaste that is said to be effective in whitening teeth, but... how effective is it? I don't know haha