Low-carbohydrate, high-protein diets that restrict potassium-rich fruits and vegetables promote calciuria
In a recent issue of Osteoporosis International, Carter et al. reported that subjects adhering to a ketogenic, low-carbohydrate/high-protein (LCHP) diet for weight loss did not display increased bone turnover markers after 3 months compared to control subjects consuming a typical, unrestricted diet . In this trial, weight loss averaged 6.4 kg versus 1.1 kg in the dieters and controls respectively (p=0.0008), whereas the mean urinary N-telopeptide increased by 1.6 versus 1.9 nmol BCE/mmol creatinine in the dieters and controls, respectively (p=0.86). Although this trial supports the view that high-protein diets do not adversely affect bone [2, 3], the dietary level of alkalizing minerals was not considered.
High-protein diets generate excessive amounts of acid due to the obligatory catabolism of sulfur amino acids, and bone may respond by releasing basic salts into the circulation . Hence, if high-protein intakes are not accompanied by an adequate intake of alkalizing minerals,...
KeywordsBone Turnover Marker Urinary Calcium Sulfur Amino Acid Increase Bone Turnover Unrestricted Diet
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