The Study
Assessing Bone and Adipose Tissue Biomarkers in 5–6-Year-Old Polish Children Adhering to Vegetarian and Traditional Diets
This study looked at two groups of kids—one that ate meat and one that didn’t—and noticed their blood had slightly different chemicals. But it didn’t change what they ate or when they ate it, so we can’t say the food made the chemicals change—it just saw that they were different.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
Kids who eat no meat but drink milk and eat eggs have bones just as strong as kids who eat meat — but their bodies are working differently to keep them that way.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 544 / 100
Quality score
Snapshots of a population at a single point in time, or descriptions of small groups. Can identify correlations and prevalence, but cannot determine cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1The differences are subtle and don’t mean weaker bones — just that the body is using different signals to build and maintain bone, possibly due to diet.
- 2Vegetarian kids had 2–5% higher bone turnover markers and 20–30% higher carboxylated osteocalcin, but bone density was the same as omnivorous kids.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Nutrients
Year
2026
Authors
J. Ambroszkiewicz, J. Gajewska, Joanna Mazur, G. Rowicka, W. Klemarczyk, M. Chełchowska
Related Content
Claims (6)
People who eat plant-based diets experience more bone fractures and higher rates of osteoporosis than people who consume animal protein.
Children aged 5–6 who eat a lacto-ovo-vegetarian diet have higher levels of carboxylated osteocalcin and a higher ratio of carboxylated to uncarboxylated osteocalcin than children who eat an omnivorous diet, suggesting differences in how vitamin K is used in bone metabolism.
Children aged 5 to 6 who eat a lacto-ovo-vegetarian diet have the same bone mineral density as children who eat an omnivorous diet.
In 5–6-year-old children, the connection between adiponectin and leptin levels and bone mineral density is stronger in children who eat meat than in those who follow a vegetarian diet.
Children aged 5–6 who eat a lacto-ovo-vegetarian diet have higher levels of bone alkaline phosphatase and CTX-I, and a lower osteocalcin-to-CTX-I ratio than children who eat an omnivorous diet, even though their bone mineral density is the same.
Children aged 5–6 who follow vegetarian diets have lower levels of high-molecular-weight adiponectin and a lower ratio of high-molecular-weight to total adiponectin compared to children who eat omnivorous diets, which is linked to differences in adipose tissue signaling related to metabolism and bone regulation.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.