Dietary Protein Requirement Threshold and Micronutrients Profile in Healthy Older Women Based on Relative Skeletal Muscle Mass / Praval Khanal, Lingxiao He, Hans Degens, Georgina K. Stebbings, Gladys L. Onambele-Pearson, Alun Williams, Martine Thomis, Christopher I. Morse
Nutrients, Volume: 13, Issue: 9, Start page: 3076
Swansea University Author: Alun Williams
PDF | Version of Record
© 2021 by the authors. This is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) licenseDownload (982.79KB)
Although multiple nutrients have shown protective effects with regard to preserving muscle function, the recommended amount of dietary protein and other nutrients profile on older adults for maintenance of high muscle mass is still debatable. The aims of this paper were to: (1) identify dietary diff...
Check full text
No Tags, Be the first to tag this record!
Although multiple nutrients have shown protective effects with regard to preserving muscle function, the recommended amount of dietary protein and other nutrients profile on older adults for maintenance of high muscle mass is still debatable. The aims of this paper were to: (1) identify dietary differences between older women with low and high relative skeletal muscle mass, and (2) identify the minimal dietary protein intake associated with high relative skeletal muscle mass and test the threshold ability to determine an association with skeletal muscle phenotypes. Older women ( = 281; 70 ± 7 years, 65 ± 14 kg), with both low and high relative skeletal muscle mass groups, completed a food questionnaire. Skeletal muscle mass, fat-free mass (FFM), biceps brachii thickness, anatomical cross-sectional area (VL ), handgrip strength (HGS), maximum elbow flexion torque (MVC ), maximum knee extension torque (MVC ), muscle quality (HGS/Body mass), and fat mass were measured. Older women with low relative skeletal muscle mass had a lower daily intake of protein, iodine, polyunsaturated fatty acid (PUFA), Vit E, manganese, milk, fish, nuts and seeds ( < 0.05) compared to women with high relative skeletal muscle mass. The minimum required dietary protein intake for high relative skeletal muscle mass was 1.17 g/kg body mass/day (g/kg/d) (sensitivity: 0.68; specificity: 0.62). Women consuming ≥1.17 g/kg/d had a lower BMI (B = -3.9, < 0.001) and fat mass (B = -7.8, < 0.001), and a higher muscle quality (B = 0.06, < 0.001). The data indicate that to maintain muscle mass and function, older women should consume ≥1.17 g/kg/d dietary protein, through a varied diet including milk, fish and nuts that also contain polyunsaturated fatty acid (PUFA) and micronutrients such as iodine, Vit E and manganese.
pre-sarcopenia, musculoskeletal health, protein
College of Engineering