Surely, all the past warning by vegans against consuming too much proteins, as being bad for bones, especially animal proteins, must have been based on something? Something must have happened in the environment...
Biomarker-calibrated protein intake and bone health in the Women's Health Initiative clinical trials and observational study
Quotes [my comments added in square brackets]:
Background: The effects of dietary protein on bone health are controversial.
[Really? I was under an impression that it has all been 'proven' long ago by a scientist from Cornell...]
Conclusions: Higher biomarker-calibrated protein intake within the range of usual intake was inversely associated with forearm fracture and was associated with better maintenance of total and hip BMDs.
These data suggest higher protein intake is not detrimental to bone health in postmenopausal women.
[This is using double-negative form to weaken a perceived impact of the statement. Under 'normal' circumstances, a scientist would have simply stated: "We found that eating more protein improves bone density and reduces probability of some types of bone fractures in postmenopausal women"]
(P.S. Thanks JC for the link!)