What is the acceptable percentage of an adult's total daily calories that should come from protein?

The ideal percentage of total daily calories that should come from protein for adults typically falls within the range of 10% to 35%. The correct answer reflects a higher end of that spectrum, which can be beneficial for certain populations, particularly those engaging in intense physical activity or specifically focusing on muscle maintenance and repair.

A protein intake of around 30% could be appropriate for individuals looking to optimize muscle synthesis, maintain satiety, and support metabolic health, especially in the context of a structured fitness program. This higher protein percentage can contribute to better overall body composition by preserving lean muscle mass while facilitating fat loss.

It's essential to take into account individual factors like activity level, age, and specific health goals when determining optimal protein intake. Ultimately, a well-rounded diet that balances carbohydrates, fats, and proteins is critical for overall health and performance. In this context, the choice representing 30% aligns with recommendations for active adults aiming to support their fitness and wellness routines effectively.