Hidden factor that increases the risk of dementia named by scientists

A large-scale analysis of over 80 studies has identified a link between muscle mass loss (sarcopenia) and an increased risk of dementia. People with sarcopenia had a 42% higher risk of developing dementia. Researchers emphasize that when assessing the health of older adults, it is important to consider not only weight but also muscle mass.

A large-scale analysis of over 80 scientific studies conducted by researchers at Curtin University has revealed an important connection between a person's physical condition and brain health. The results showed that people with sarcopenia—age-related loss of muscle mass, strength, and physical function—had a 42% higher risk of developing dementia. Lead author Uraiporn Buranasuksakul emphasized that when assessing the health of older adults, it is not enough to focus only on the number on the scale; what matters is the proportion of body mass that is muscle. The researchers also obtained unexpected results when analyzing obesity: in people under 65, it was associated with an approximately 9% increase in dementia risk, while after age 65, it was associated with an approximately 17% decrease in risk. However, Professor Mario Siervo warned that these data should not be taken as a recommendation to gain weight in old age. The findings reinforce attention to maintaining muscle mass with age through regular physical activity and adequate protein intake.