What is the recommendation for protein intake by dietary reference intakes?

The recommendation for protein intake by dietary reference intakes is indeed 10-35% of total calories. This range is established to ensure that individuals receive sufficient protein to support various bodily functions, including muscle synthesis, immune function, and hormone production.

This guideline considers the varying needs of different populations, promoting flexibility to accommodate different dietary patterns while ensuring adequate protein consumption. The lower end of the range (10%) caters to those who have lower protein requirements, like sedentary individuals or some plant-based diets, while the upper end (35%) allows for higher protein intake suitable for active individuals, athletes, or those requiring higher protein for specific health reasons.

Other ranges, such as 5-15%, do not provide enough protein for most populations, especially when considering growing children, pregnant or lactating women, and those engaging in regular physical activity. The options suggesting 20-40% and 15-30% also fall outside the established recommendations. The 10-35% range is scientifically backed to support health without risking excessive intake, which may lead to cardiovascular concerns and other health issues.