Our ancestors chewed through roots, raw meat, and fibrous...
“Our ancestors chewed through roots, raw meat, and fibrous plants — every meal demanding real force, real effort, real jaw engagement. Research found that mice that ate foods requiring higher chewing force showed increased bone formation, impacting jawbone shape. Now our food is so soft it barely requires teeth. We blend it, process it, and swallow it before our jaw ever works. We didn't shrink our jaws. We just stopped challenging them. The crazy part? Nobody warned us that softer food would quietly reshape the face we were born to have.”
Summary
Scientific research confirms that harder‑chewing diets stimulate bone formation and promote a more robust jaw, while softer, processed foods are associated with reduced jaw growth and a smaller, broader facial structure. Studies in mice and humans, as well as archaeological evidence, show that dietary texture, not genetics, has been a primary driver of recent changes in jaw shape. Major news outlets report that the shift to ultra‑processed, soft foods correlates with the observed decrease in jaw size.
Sources 58 searched
- Effects of food processing on masticatory strain and craniofacial growth in a retrognathic face - ScienceDirect
Changes in the technology of food preparation over the last few thousand years (especially cooking, softening, and grinding) are hypothesized to have contributed to smaller facial size in humans because of less growth in response to strains ...
- Forceful mastication activates osteocytes and builds a stout jawbone | Scientific Reports
A novel in silico computer simulation indicated that the masticatory load onto the jawbone leads to the typical bone profile seen in the individuals with strong masticatory force, which was confirmed by in vivo micro-computed tomography (micro-CT) ...
- Association of feeding behavior with jaw bone metabolism ...
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- Role of Masticatory Force in Modulating Jawbone Immunity and Bone Homeostasis: A Review - PMC
Further research has shown that increased masticatory activity, such as chewing a hard diet, suppresses sclerostin, a protein that inhibits bone formation, and induces the expression of Insulin-like growth factor (IGF)-1 in osteocytes [90]. IGF-1 receptor expression is also upregulated in ...
- Muscle-Bone Crosstalk in the Masticatory System: From Biomechanical to Molecular Interactions - PMC
Based on our results in a mouse model, it is advisable to characterize how the negative effect of BoNTA-induced masseter atrophy on the mandibular bone occurs. Is it limited to a biomechanical interaction, or does it respond to alteration on the secretory activity of soluble factors from the injected muscles, such as IL-6? The answer to this question may help to develop strategies to avoid BoNTA’s deleterious effect on the mandible. As mentioned above, the jaws undergo pathologies that are specific to them, but they are also affected by more general conditions such as bone loss during aging (195).
- Are ultra-processed foods changing the shape of our jaws? | Ultra-processed foods | The Guardian
Study has linked a soft and liquid diet to smaller jaw size in children, but others say evolution is more likely the cause
- Jawbones are 'shaped by diet', a study finds - BBC News
The study has shown that jaws grew shorter and broader as humans took on a more pastoral lifestyle.
- Human jaw shrinkage - Wikipedia
Experiments done on non-human subjects ... in life lead to maladaptive morphological change in their jaws, intended to simulate what we are observing globally in human children. Significant craniofacial changes due to diet have even been experimentally shown in pigs during development; researchers fed groups either a hard-consistency diet or a soft-consistency diet, for eight months in total. Drastic differences in jaw and facial musculature, ...
- Why Human Jaws Are Shrinking and Why Oral Posture Matters | Blog | ProMedica
This phenomenon, often linked to the industrial and agricultural revolutions, is driven by environmental factors — specifically softer diets and poor oral posture — rather than genetics,” shares Terry Norris, DMD, the lead consulting dentist for HRI Dental & VisionHRI Dental & Vision.
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