The Study
High-protein diets for weight loss and their associations with bone status and diet quality in female college students
This study looked at what girls were eating and how strong their bones were at the same time, like taking a snapshot. It found that girls who ate more protein for weight loss also tended to have weaker bones, but we don’t know if eating more protein made their bones weaker, or if girls with weaker bones just started eating more protein to feel better.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
Some college girls eat lots of protein to lose weight, but they often skip milk and veggies — and their bones might be weaker because of it.
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.
- 1Yes — even though these women weren't underweight, their bones were weaker than peers who lost weight without high protein, suggesting what you eat matters more than just how much you weigh.
- 261% ate too much protein; 50% had low bone density (osteopenia); calcium intake was low in all groups, but lowest in high-protein dieters.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Nutrition Research and Practice
Year
2026
Authors
Seon-Young Park, J. Yeon, Mi-Hyun Kim
Related Content
Claims (6)
People who consume more dietary protein, including from animal sources, have higher bone mineral density.
Female college students who lose weight without high-protein diets have higher bone quality than those who use high-protein diets, even when their body weight and BMI are the same.
Female college students who are trying to lose weight consume less calcium than those who are not trying to lose weight, regardless of how much protein they eat.
Female college students using high-protein diets for weight loss eat more animal protein and protein supplements than those using other weight-loss methods, and dairy consumption is low in all groups.
Female college students aged 18–25 who follow high-protein diets to lose weight have measurably lower bone density and bone strength compared to those who lose weight without increasing protein intake, even when accounting for body weight, calcium consumption, and physical activity.
Female college students who follow high-protein diets to lose weight consume less calcium and eat a narrower range of foods than those using other weight-loss methods; 61% of them consume more protein than recommended, and half show signs of osteopenia.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.