Which demographic factor can significantly affect an individual's dietary protein needs?

Age is a significant demographic factor affecting an individual's dietary protein needs due to biological changes that occur throughout the life cycle. As a person ages, their body undergoes various physiological modifications that influence protein synthesis, muscle mass maintenance, and overall metabolic health.

In childhood and adolescence, protein is crucial for growth and development, supporting rapid tissue synthesis, hormonal functions, and immune health. During adulthood, protein needs may stabilize but still remain important for sustaining muscle mass, particularly in physically active individuals. As individuals enter older adulthood, protein requirements generally increase to help counteract the natural decline in muscle mass known as sarcopenia. Adequate protein intake in older adults is essential for preserving muscle strength, supporting recovery from illness, and maintaining metabolic functions.

Therefore, age dictates not only how much protein a person needs but also how their body utilizes protein, making it a vital factor in dietary planning. Understanding these age-related protein needs can help nutrition coaches provide tailored recommendations that align with their clients' life stages and health goals.