A 1:1 matched case-control study on dietary protein intakes and hip fracture risk in Chinese elderly men and women

Increased Dietary Intakes of Total Protein, Animal Protein and White Meat Protein Were Associated with Reduced Bone Loss—A Prospective Analysis Based on Guangzhou Health and Nutrition Cohort, South China

“…Protein from different sources has been inconsistently demonstrated to aid bone health. Our longitudinal findings are in line with several previous reports [ 25 , 26 , 27 , 28 ] showing that animal protein but not plant protein could alleviate bone loss or reduce fracture risks, but not all [ 5 , 23 ]. The relative superiority of animal protein over plant protein may be related to the calcium contained in animal foods, with good absorption and bioavailability; high levels of aromatic AA in animal products [ 29 ]; other bone-favorable components in the diet (seafoods and dairy products); or dietary patterns [ 6 , 30 ].…”

Foods, nutrients and hip fracture risk: A prospective study of middle-aged women

“…We found that the association for protein was more pronounced in underweight women. Similarly, a recent case-control study in Chinese adults showed an inverse association for protein intake with hip fracture risk that was more evident in those with a lower BMI [42].…”

Metabolomic patterns, redox-related genes and metals, and bone fragility endpoints in the Hortega Study

“…Evidence evaluating the association between amino acids and reduced BMD is still scarce, given the lack of studies. In this regard, only two prospective studies from China (N = 1070 and 2997) [21,23] have studied BCAA exposure in incident bone fracture, with no statistically significant results. Regarding AAA exposure, both Chinese studies and another study from the US (N = 5187) observed inverse associations between serum [21,23] and dietary [18] tryptophan with incident bone fractures, contrary to our results.…”