Water vs Sports Drinks: Which Is Better for Your Teeth?

Water is the best everyday drink for your teeth, while many sports and energy drinks are acidic enough to soften and gradually erode enamel — especially when they're sipped slowly over a long period. It's a surprise to a lot of people, because these drinks are marketed as healthy. Here's how common drinks compare and how to protect your teeth if you do have them.

What acidity does to enamel

Acidity is measured on the pH scale, where lower numbers are more acidic. Tooth enamel starts to soften and lose minerals once the mouth drops below about pH 5.5. Saliva slowly brings things back to normal afterwards, but every acidic drink restarts the clock — and sipping over a long time keeps your teeth in the acid zone much longer than having a drink in one go.

How common drinks rank by acidity

These are approximate figures and vary by brand, but they show the general picture:

• Water — around neutral (about pH 7). The safest choice for teeth.
• Plain milk — around pH 6.7, and it contains calcium that's good for teeth.
• Sports drinks — often around pH 3 to 4, plus sugar.
• Fruit juice — often around pH 3 to 4, even with no added sugar.
• Energy drinks — often around pH 3, usually with sugar and caffeine too.
• Soft drinks and cola — often around pH 2.5, among the most acidic.

For comparison, anything below about pH 5.5 sits in the range where enamel can start to soften.

It's not only the acid — sugar matters too

Many of these drinks are also sugary. The bacteria in plaque turn sugar into even more acid, so a sweet, acidic drink delivers a double hit. That's true of “no added sugar” juices as well, because they're still naturally acidic.

The catch for active kids and teens

Sports and energy drinks are often seen as a healthy choice during sport, but sipping them throughout a game bathes the teeth in acid for a long stretch. For most everyday activity, water does the job and is far kinder to teeth.

How to protect your teeth if you do drink them

• Have water alongside — and finish with a mouthful of water to rinse.
• Drink it in one sitting — rather than sipping over an hour or more.
• Use a straw — this can help keep some of the liquid away from your teeth.
• Keep them to mealtimes — your mouth handles acid better when you're eating.
• Don't brush straight away — softened enamel is more easily worn, so wait a while (around an hour) before brushing after something acidic.

Frequently asked questions

Are sports drinks really as bad as soft drink for teeth?

Many are similarly acidic, so for the teeth they're not the healthy option they appear to be. Soft drink and cola tend to be the most acidic, but sports and energy drinks aren't far behind.

Is fruit juice okay because it's natural?

Natural doesn't mean gentle on teeth — juice is still acidic and sugary. It's better kept to mealtimes and in modest amounts, with water as the everyday drink.

Does sparkling water harm teeth?

Plain sparkling water is mildly acidic and far gentler than soft or sports drinks. Flavoured versions can be more acidic, so plain is the safer pick.

Why shouldn't I brush right after an acidic drink?

Acid temporarily softens enamel, and brushing immediately can wear it away. Rinse with water and wait a while before brushing.

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We review this article periodically so the information stays current for 2026.