The acid in vinegar can have extremely detrimental effects on tooth enamel, especially the less mature enamel of teens, according to Sharecare. Specifically, one study showed that teens who regularly consume foods with vinegar experienced a 30 to 85 percent higher chance of suffering enamel erosion.
Some people consume apple cider vinegar for weight loss purposes, reports WebMD. However, the results are uncertain and the negative implications for teeth often outweigh any diet benefits. It is best to avoid consuming undiluted vinegar. Some people mix a little vinegar with water and sip it at meals. Rinsing after eating foods or drinking beverages with vinegar can actually protect teeth.