Is Red Wine Good for Your Teeth?
Red wine has previously been linked to a range of supposed health benefits, from helping the heart to lowering the risk of diabetes.
Now a new study suggests it contains chemicals that can help in the fight against tooth decay and gum disease.
Researchers found compounds from the drink, known as polyphenols, helped fend off harmful bacteria in the mouth.
Not in any practical sense. A 2018 laboratory study found that two compounds from red wine made some mouth bacteria less able to stick to gum cells in a dish. That is an interesting clue for future products, but wine itself is acidic, it stains, and drinking more of it is not a way to protect your teeth or gums.
What did the study test?
Researchers in Spain asked whether polyphenols, plant compounds found in red wine, could stop harmful mouth bacteria from attaching to gum tissue. Attachment is the first step in forming plaque.
They grew human gum cells (gingival fibroblasts) in the lab and exposed them to three bacteria linked to dental disease: Streptococcus mutans, a main cause of tooth decay, and Porphyromonas gingivalis and Fusobacterium nucleatum, which are linked to gum disease. They tested two individual wine polyphenols, caffeic acid and p-coumaric acid, along with grape seed and red wine extracts.
What did they find?
All of the compounds and extracts reduced how well the bacteria stuck to the gum cells.
The two individual acids worked better than the extracts.
When the acids were combined with Streptococcus dentisani, a bacterium being studied as an oral probiotic, they were even better at blocking S. mutans.
The cells and bacteria began breaking the polyphenols down, which suggests the mouth starts to process these compounds.
What are the limits?
This was a laboratory model. No one drank wine, no teeth or gums were examined, and the amounts tested do not tell us what happens in a real mouth after a glass. The authors themselves said more work is needed to explain the effect. A lab result like this is a reason to keep studying polyphenols, perhaps for future rinses or other products. It is not a reason to change what you drink.
What does this mean for your teeth now?
Wine is acidic, and frequent sipping softens enamel over time. Red wine also stains teeth. Alcohol carries its own health risks. The National Cancer Institute lists drinking alcohol as a risk factor for cancers of the mouth and throat. If you drink wine, a few habits help:
Have it with a meal rather than sipping over a long evening.
Rinse with water afterward.
Keep cleaning between your teeth and using fluoride toothpaste.
Polyphenols are also found in tea, coffee, berries, grapes, cherries and beans. Some of these stain or are acidic too, so the same habits apply. Our guide to foods for healthy teeth covers diet in more detail, and sparkling water is a common question for people cutting back on wine.
If you are in Jacksonville and have questions about staining or enamel wear, contact our office or arrange a dental examination.
Sources
Esteban-Fernández A, Zorraquín-Peña I, Ferrer MD, et al. Inhibition of oral pathogens adhesion to human gingival fibroblasts by wine polyphenols alone and in combination with an oral probiotic. J Agric Food Chem. 2018;66(9):2071-2082. doi:10.1021/acs.jafc.7b05466. Retrieved via PubMed.
National Cancer Institute. Alcohol and cancer risk fact sheet. Retrieved October 6, 2026.
About the author. CJ Henley, DMD, is a general dentist in Jacksonville whose practice focuses on cosmetic and restorative dentistry, dental implants and dental care around head and neck cancer. Meet Dr. Henley.
CJ Henley, DMD, PA · 3675 Hendricks Avenue, Jacksonville, FL 32207 · 904-398-1549
Updated October 2026.