Written by the Nuvirox Research Team
Key Points
- Teeth don't actually get longer with age — the gums recede, exposing more of the tooth root, which creates the visual illusion of longer teeth.
- A 2025 cross-sectional study found gingival recession increased significantly with age and was more common in thin gingival tissue and where bleeding-on-probing was elevated.
- The periodontal ligament and surrounding gum tissue rely on collagen for structure, and that connective tissue thins and loses resilience the same way skin does.
Short answer: your teeth aren't growing — your gums are receding. What looks like "longer teeth" with age is almost always gingival recession: the gum line pulling back and exposing more of the tooth's root surface, which was always there but covered. The tooth itself hasn't changed length; the amount of it you can see has.
What Is Gingival Recession, Exactly?
Gums are supported by a network of connective tissue, collagen fibers, and the periodontal ligament, which anchors the tooth root to the surrounding alveolar (jaw) bone. Over decades, that supporting tissue can thin and pull back for a mix of reasons: cumulative mechanical stress from brushing, thinning gingival tissue phenotype, low-grade gum inflammation, and bone-level changes around the tooth. As the gum margin moves downward or upward relative to the tooth, more of the root — which is a duller yellow-white color than the enamel crown, without an enamel coating — becomes visible. That color difference is part of why receded teeth look noticeably "longer."
Does It Actually Get Worse With Age?
Yes, and it's been measured directly. Cross-sectional evaluation of periodontal health and orthodontic treatment on gingival recession, 96 patients (mean age 20.4 yrs), 2025. PMC12224597. found that gingival recession was significantly more common with advancing age, and was associated with thinner gingival tissue (a "thin phenotype") and higher rates of bleeding on probing, a marker of gum inflammation. Thin-phenotype gum tissue has less collagen-rich bulk to begin with, so it recedes more readily under the same mechanical and inflammatory stress that thicker gum tissue tolerates without visible change.
Simplified illustrative comparison; individual anatomy varies by tooth and person.
Study Snapshot: Gingival Recession and Age (2025)
| Design | Cross-sectional clinical evaluation |
| Participants | 96 patients (65 women, 31 men), mean age 20.4 years at baseline cohort, age-stratified analysis |
| Key finding | Recession significantly more common with age (p<0.05) and thin gingival phenotype |
| Honest limit | Cross-sectional design shows association, not proof that age itself (vs. cumulative exposure) is the direct cause |
What the Evidence Actually Shows
Beyond the age-association data above, orthodontic literature adds a related but distinct piece: recession risk also depends on tooth position and root prominence within the jawbone, not just age or brushing habits. Studies on orthodontic patients found recession was more likely when a tooth's root sat close to a thin outer bone plate, regardless of how carefully someone brushed.
The honest counterweight: the age-recession link is real and well-replicated, but aggressive brushing technique, tobacco use, teeth grinding, and untreated gum disease are usually bigger drivers than age alone. Two people can be the same age with very different degrees of recession depending on these modifiable factors and their baseline gum-tissue thickness. There's also no clinical trial testing oral collagen supplementation specifically for gingival recession — the mechanism argument (gum tissue is connective tissue, and connective tissue is collagen-dependent) is biologically plausible but unproven for recession specifically.
What Won't Fix This
Once gum tissue has receded, it typically doesn't grow back on its own; whitening toothpaste, brushing harder, or over-the-counter gum products won't restore lost tissue. Meaningful recession (especially if it's causing sensitivity, a visible notch at the gum line, or exposing a significant amount of root) is a case for a periodontist, who can evaluate whether a graft procedure is appropriate. See a dentist if recession is rapid, one-sided, or paired with bleeding, looseness, or pain. Orthodontic tooth movement, particularly excessive proclination (tipping teeth forward) of the lower front teeth, has also been identified as a contributing factor independent of age or brushing habits, which is worth mentioning if you've had braces or clear aligners as an adult.
What You Can Actually Do
The most evidence-backed levers are a soft-bristled brush with gentle technique, treating any active gum inflammation (bleeding on brushing is not normal and is worth a dental visit), addressing teeth grinding with a night guard if present, and routine periodontal maintenance. These target the modifiable drivers that the 2025 cross-sectional data specifically flagged — bleeding on probing and mechanical stress — rather than trying to reverse recession after the fact. A dental hygienist can also assess your gingival phenotype (thin versus thick tissue) at a routine cleaning, which gives you a realistic sense of how much buffer you have before mechanical or inflammatory stress is likely to show up as visible recession.
Frequently Asked Questions
Can gum recession be reversed naturally?
Mild recession sometimes stabilizes once the underlying cause (aggressive brushing, untreated inflammation) is addressed, but tissue that has already receded generally doesn't regenerate without a surgical graft procedure.
Is gum recession the same as gum disease?
Not necessarily. Recession can happen from purely mechanical causes like brushing technique or thin tissue, without active periodontal disease, though periodontal disease is one of the more common drivers.
Does teeth grinding cause recession?
It can contribute, by placing abnormal lateral force on teeth and the surrounding bone and gum tissue, which some clinicians believe accelerates localized recession over time.
At what age does gum recession usually start becoming noticeable?
It varies widely, but the 2025 cross-sectional data found a clear, statistically significant upward trend with age; many people first notice it in their 40s or 50s, though thin-tissue individuals can see it earlier.
Does flossing prevent gum recession?
Gentle, consistent flossing supports gum health by reducing inflammation, which the research links to recession risk — but aggressive flossing technique, like aggressive brushing, can itself contribute to mechanical gum trauma.
From Nuvirox
Why We Formulated Collagen+ Complex
We formulated Collagen+ Complex around a simple idea: give the body well-studied building blocks and cofactors instead of collagen alone, since collagen synthesis is a cofactor-dependent process, not a single-ingredient one. The connective tissue that supports your gums, like the connective tissue everywhere else in the body, depends on the same collagen-synthesis pathway, which is why we built the formula around supporting that pathway broadly rather than isolating one tissue.
We back it with a 60-day money-back guarantee — long enough to actually evaluate it the way the research above suggests you should, rather than judging it after a week.
Learn more about Collagen+ Complex →The Bottom Line
"Longer-looking" teeth with age are almost always a gum story, not a tooth-growth story — gingival recession exposes more root surface over time, and it's measurably more common as we age, especially with thin gum tissue and gum inflammation. See a dentist for anything beyond mild, stable recession. It's a good example of how a very visible age-related change can have a mechanism that has nothing to do with the structure people usually blame (the teeth themselves) and everything to do with the surrounding collagen-dependent soft tissue. For more on how connective tissue changes with age elsewhere in the body, see our piece on why skin gets thinner with age.
Related reading: Why Does the Nasolabial Fold (Smile Line) Deepen With Age?
References
- Cross-sectional evaluation of periodontal health and orthodontic treatment on gingival recession, 96 patients (mean age 20.4 yrs), 2025. PMC12224597.
- Evaluation of the effect of periodontal health and orthodontic treatment on gingival recession: a cross-sectional study. PMC12224597.
- Root prominence and thin buccal bone as risk factors for gingival recession in orthodontic literature (cephalometric analyses).
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for professional medical advice.