Losing Teeth May Lead to Weight Gain, Study Finds

Researchers link tooth loss to higher odds of weight gain over 4 years.

Apr. 13, 2026 at 7:00pm

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A ghostly, translucent X-ray photograph revealing the intricate internal structure of a human molar tooth, with glowing lines against a dark background.An X-ray view of a human molar tooth, highlighting the complex internal structures that play a key role in chewing and digestion.Memphis Today

A new study published in the Journal of Periodontology found that losing teeth, especially molars, is significantly associated with weight gain. Researchers followed over 900 people and discovered that those with fewer teeth and poorer oral health were more likely to experience a 5% or greater increase in body weight during the 4-year study period.

Why it matters

This research adds to growing evidence that oral health is closely tied to overall health, especially as people age. Maintaining healthy teeth and gums supports better nutrition and quality of life, which can impact weight management.

The details

The study found that people with missing molars had a 17% higher risk of weight gain compared to those with more complete dentition. Tooth loss can limit a person's ability to chew healthy, fiber-rich foods like fruits and vegetables, leading them to opt for softer, higher-calorie options instead.

  • The study followed participants for 4 years, starting from when they entered the long-term health research project.
  • The findings were published on April 8, 2026 in the Journal of Periodontology.

The players

Natália Pola

A professor at the Federal University of Pelotas in Brazil and the lead researcher on the study.

Dr. Ana Becil Giglio

The president of the American Academy of Periodontology and a New York City periodontist who was not involved in the study.

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What they’re saying

“These findings add to the growing body of evidence that periodontal health plays an important role in overall health, especially as we age.”

— Dr. Ana Becil Giglio, President, American Academy of Periodontology

“Maintaining healthy teeth and gums supports better nutrition, good habits and improved quality of life later in life.”

— Dr. Ana Becil Giglio, President, American Academy of Periodontology

“Loss of functional tooth units, especially molars, were associated with higher odds of weight gain among older adults over 4 years.”

— Natália Pola, Professor, Federal University of Pelotas

What’s next

Researchers noted that more study is needed to better understand the precise relationship between tooth loss and weight gain. Future research may explore potential interventions to help maintain oral health and support healthy eating habits as people age.

The takeaway

This study highlights the importance of prioritizing oral health as part of an overall strategy for weight management and healthy aging. Maintaining strong teeth and gums can support better nutrition and quality of life, which are key factors in preventing unwanted weight gain.