Protein deficiency linked to chronic fatigue after age 50

Chronic protein deficiency is identified as a primary cause of unexplained fatigue in individuals over the age of 50. As people age, they often experience sarcopenia, which is the progressive loss of muscle mass and function. Research indicates that without specific dietary interventions, individuals can lose 1% to 2% of their muscle mass annually after age 50.

Because muscle is the body's most metabolically active tissue, its loss leads to a slower metabolism and a reduced ability to produce and utilize energy efficiently. A common dietary error in this age group is the shift toward carbohydrate-heavy meals—such as pasta, bread, or fruit—while reducing the intake of protein sources like meat, fish, and dairy. This creates a cycle where the body seeks quick energy from simple carbohydrates, leading to blood sugar spikes and subsequent energy crashes.