Key points: A recent study published in the American Journal of Clinical Nutrition used data from the third generation of Framingham study participants to examine the effects of dietary protein trends on skeletal muscle.
After analyzing data from over 2000 patients, researchers Mangamo, et al concluded that higher dietary protein consumption had positive effects on lean muscle mass and quadriceps strength. Protein consumption did not appear to affect bone mineral density.
The current Recommended Daily Allowance (RDA) for protein is 0.8 grams per kilogram of body weight. Protein assessed was from meats, legumes, dairy and eggs, as well as nuts and grain. When consumed, the body uses the amino acids from protein to build enzymes needed for biological processes as well as build muscle and support bone strength.
In this study, it was unclear if the source of protein had different health impacts, or if the amount of protein consumed was important. Additional research is needed to examine if the source of protein will affect muscle and bone health more substantially and if the consumption of too much protein, more than the RDA, results in long term health affects.
Why is this clinically relevant?
- Consuming higher amounts of protein can promote lean mass and quadriceps strength
- Increasing protein consumption may not affect bone mineral density