I got this black greenish line on my tooth right below the gum line. (photo)

Any dental procedure can only legally be provided by approved dental professionals (Dentists, dental hygienists, dental therapists, dental nurses) that have had suitable training for the procedures being carried out. Teeth whitening is considered to be practice of dentistry and can only be...

As a rule, any  color drink that will stain your white t shirt, will stain your teeth.  Especially stay away from red wines, black coffee and product like turmeric and all the colorful drinks.  

Go to a dentist for help unless you want to risk ruining your teeth while attempting to perform procedures which could likely damage your teeth.

Hello Sara941 Thank you for your question and it is important as it is often the reason people do not end up whitening their teeth for as long as there would like or get the results they would like to achieve.  I will start by saying that I have been involved in literally hundreds...

You can definitely whiten your teeth. Your teeth happen to be the shade that they are, but it doesn't prevent you from whitening. You may need to use a more concentrated whitening formula to get a great result, but you're teeth will look better than they do now.

Any clear liquids should be fine to drink after teeth whitening. Avoid red sauce, red wines and dark liquids as well.All the best,