The Claim
In Chinese adults aged 18–64, dietary animal protein intake has a curvilinear association with bone mineral density at the lumbar spine, total hip, and whole body, with a positive association below 0.87 g/kg/day and a negative association above this threshold.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In Chinese adults aged 18–64, consuming less than 0.87 grams of animal protein per kilogram of body weight per day is associated with higher bone mineral density, while consuming more than this amount is associated with lower bone mineral density.
See the scientific wording
In Chinese adults aged 18–64, dietary animal protein intake exhibits a curvilinear association with bone mineral density (BMD) at the lumbar spine, total hip, and whole body, with a positive association below 0.87 g/kg/day and a negative association above this threshold, suggesting an optimal intake range for bone health.
When people eat moderate amounts of animal protein, gut bacteria produce compounds that make the body's internal environment slightly more acidic, which helps the intestines absorb more calcium from food. This extra calcium strengthens bones. But when people eat too much animal protein, the gut bacteria produce too many acidic compounds, which forces the body to pull calcium out of bones to balance the acid levels, weakening them over time.
What the research says
1 studyThis study found that Chinese adults who eat a moderate amount of animal protein (less than 0.87 grams per kg of body weight) have stronger bones, but those who eat more than that have weaker bones — so there’s a sweet spot for bone health. It’s like too little or too much protein can hurt your bones, but just the right amount helps.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.