Does Using a Straw Protect Your Teeth? What Dentists Say

Vicki, there’s a common belief—sometimes even repeated by dental professionals—that using a straw reduces staining from coffee and tea or lessens the harmful effects of sugar in sodas. That idea is misleading, and I disagree with many colleagues on this point. Here’s why.

Try paying attention the next time you sip through a straw: you will typically feel the liquid touch your teeth. A straw usually sits between your lips and in front of your teeth, so beverages with sugar or acid still contact tooth surfaces and can contribute to decay and erosion. People who hold a straw between their teeth often expose the back portions of their teeth as well.

The tongue is another route of exposure: because it constantly touches the teeth, any drink that contacts the tongue will transfer to tooth surfaces. In short, if you can taste the drink, your teeth have likely been exposed.

To truly avoid contact with teeth when using a straw, you would need to position the straw’s tip behind both teeth and tongue so the liquid travels directly to the back of the throat. Practically, that’s more like taking a quick shot than enjoying a beverage, and it defeats the usual purpose of sipping coffee, juice, or soda.

There are additional downsides to frequent straw use. Repeated puckering to sip can contribute to fine lines and wrinkles around the mouth—similar to the effect seen with habitual smokers. Drinking through a straw can also increase swallowed air, which may cause gas or bloating for some people.

My recommendation is to minimize or eliminate sugary drinks and juices where possible; unsweetened green tea is a better alternative. If you do consume acidic or sugary beverages, follow them with water. Rinsing with water helps neutralize acid and reduce the risk of staining. A pH-balancing mouth rinse can have a similar effect.

If you choose to brush after consuming acidic drinks, wait at least 30 minutes. Acids soften enamel temporarily, and brushing immediately can remove mineral-rich surface enamel, increasing sensitivity and wear.

Hope this helps!