Baking soda can lift surface stains however does not bleach tooth color; usage sparingly
https://www.animenewsnetwork.com/bbs/phpBB2/profile.php?mode=viewprofile&u=1173815
Baking soda can raise surface area discolorations but does not bleach tooth color; usage moderately, and couple with fluoride tooth paste to protect enamel and enhance teeth.