Sodium bicarbonate can lift surface area stains however does not bleach tooth color; use sparingly
https://telegra.ph/The-Length-Of-Time-Does-Teeth-Whitening-Last-A-Practical-Timeline-04-15
Sodium bicarbonate can raise surface discolorations however does not bleach tooth color; use moderately, and pair with fluoride tooth paste to secure enamel and strengthen teeth.