Yale researchers identify mechanism for calorie restriction to reduce inflammation

Researchers from the Yale School of Medicine have identified a specific biological mechanism through which calorie restriction may reduce age-related inflammation. According to a study published in ‘Nature Aging’, controlled reduction in caloric intake affects the complement system, a part of the innate immune system.

The study analyzed plasma samples from 42 healthy, non-obese adults participating in the CALERIE program. Over a two-year period, participants reduced their energy intake by an average of 14 percent through controlled restriction rather than starvation. Proteomic analysis revealed a decrease in several complement system components and pro-inflammatory markers, most notably the protein fragment C3a, which is known to drive inflammatory responses.

Findings suggest that the reduction in C3a levels was not solely dependent on weight loss, indicating the effect is a direct result of caloric restriction rather than just fat tissue reduction. Scientists noted that aging is associated with increased C3 production, particularly in visceral white adipose tissue. This discovery could eventually lead to therapies that mimic the anti-inflammatory benefits of calorie restriction without the need for strict dietary regimens.