Can Milk Cause Cavities?

First published September 2019
Updated October 2025 

Can Milk Cause Cavities? 

During every dental check-up, parents have one question, “Does my child have cavities?” For years the focus has been on regular brushing to prevent dental decay. However, parents are increasingly aware that diet, especially beverages, can be a key factor in developing cavities. 

Drinks to Avoid

Soft drinks (soda or pop) have long been known to cause cavities and should be avoided for a few health reasons. A hidden danger is juice, which also has high amounts of sugar. Grape juice has six teaspoons of sugar in six ounces, which is similar to popular sodas. 

Can Milk Cause Cavities?

Despite increasing consciousness about the dangers of sugary drinks, milk and milk-alternative beverages remain an area of confusion. All types of milk can cause cavities if they are inappropriately consumed. For example, cavities on the upper front teeth can develop if a baby with teeth is put to bed at night with a bottle of milk. However, plain cow’s milk typically does not cause cavities if it is given in a cup with meals. Flavored milks that contain sugar, such as chocolate or strawberry milks, are more likely to cause cavities. 

What About Nondairy Milks?

Although cow’s milk is one of the most consumed foods worldwide, sales of alternative milk beverages including soy, almond, oat, cashew, rice, macadamia nut, pecan and flax milks are on the rise. These beverages are made from grinding the source ingredient and mixing with water.

Households may switch to these types of beverages for a variety of dietary or medical reasons including cultural considerations, concerns about allergies, weight loss and lactose intolerance. People are also increasingly concerned about hormones, genetic engineering and animal rights and they perceive a plant-based diet that includes milk alternatives as healthier. There are limited studies that look at the effects of these milk alternatives on cavities in children. The few lab studies conducted suggest that these non-dairy milk beverages are probably as cavity-causing as cow’s milk. Milk alternatives that have flavoring such as chocolate or vanilla are more likely to cause cavities than plain or unsweetened versions of the same milk alternative. Drinking milk alternatives with meals and avoiding sweetened milk alternative is the best bet to avoid cavities.

Cavity Free Tips

Cavities are preventable! When it comes to drinks and cavities, here are some general tips:

• Only water should be in a bottle or sippy cup in bed once the teeth have come in
• Juice has little nutritional value and is a source of excess calories and sugar
• Soft drinks have no place in the diet of children
• Sugar-containing drinks, including milk and milk-alternative beverages, should be limited to mealtimes

Every child is unique - visit a dentist by age 1 for specific recommendations for your child. For more information about the Dental Clinic at Nationwide Children’s Hospital, click here.