Well ubers take really long , and when one is wasted then it can cause angerSource 6 seasons of UGC comp <| sep |> It slowly getd better , then it gets a lot worse , and then slowly better . Then it shouldnt get worse anymore <| sep |> You can open an account within minutes <| sep |> It ' s impossible to say if the smoothie and tea are causing that or not without more information , most if which would be best obtained from a professional dental exam . Teeth can get more yellow naturally as we age and that ' s not necessary a problem . The layer of tooth under the enamel is yellow and over time the enamel can become more translucent and allow the yellow to show through more . Whiteningbleaching can make enamel opaque white again . Teeth can also pick up harmless surface stains which can be removed by a dental hygienist . More problematic causes for color change would be related to tooth decay , teeth with dead nerves , gum recession , or periodontal disease the last two can make the teeth roots more visible over time and the roots don ' t have enamel and thus look yellow . Again , the only way to know for sure would be to have a dentist look at it in person .