Interesting article out of “Perth Australia.”
PERTH, Australia–Dietary protein intake was positively associated with bone mineral density (BMD) in a study published in the American Journal of Clinical Nutrition (81, 6:1423-28, 2005).
Researchers conducted a cross-sectional, longitudinal trial on a population-based sample of 1,077 women aged 72 to 78 years. At baseline, protein consumption was measured with a food frequency questionnaire; bone mass and structure were measured through quantitative ultrasound of the heel. Subjects were administered a mean of 80.5 ? 27.8 g/d of protein, or 1.19 ? 0.44 g protein/kg body weight/d. At the conclusion of the year-long study, hip BMD was measured with dual-energy X-ray absorptiometry.
The researchers discovered a positive correlation between protein intake and BMD after adjustment for age, body mass index and the effect of other nutrients. Subjects in the lowest tertile of protein consumption (less than 66 g/d dietary protein) had significantly lower qualitative ultrasound of the heel and hip BMD than did subjects in the higher tertiles (more than 87 g/d dietary protein).
Based upon the results of the study, the researchers concluded protein intakes above current recommendations for elderly women may be necessary to optimize bone mass.
So much for the whiners who claim that protein can inhibit bone development. Another myth falls by the way side regarding protein.