Baking soda, yes! Vinegar, No!
Gentlemen, I don’t fully agree with some of these recommendations! Baking soda has a much lower abrasion index than more than 75% of the toothpaste available on the shelves, so feel confident to sprinkle a little on your toothbrush each morning and brush gently for whiter teeth! Vinegar is Acetic Acid, which has a pH close to that of stomach acid, so please don’t use much of that on your pearly whites (or the enamel will lose its texture and gloss!)