Too much or too little sleep may make your body age faster

A new analysis of biological aging across the human body suggests that both sleeping too little and sleeping too much are associated with faster aging in the brain, heart, lungs, immune system, and other organs. These sleep patterns were also linked to a broad range of diseases.

"Previous studies have found that sleep is largely linked to aging and the pathological burden of the brain. Our study goes further and shows that too little and too much sleep are associated with faster aging in nearly every organ, supporting the idea that sleep is important in maintaining organ health within a coordinated brain-body network, including metabolic balance and a healthy immune system," says study leader Junhao Wen, assistant professor of radiology at Columbia University Vagelos College of Physicians and Surgeons.

Scientists are increasingly using aging clocks to estimate whether a person is aging biologically faster or slower than their chronological age. These tools rely on machine learning and biological information (e.g., proteins from a minimally invasive blood test) to calculate patterns associated with aging.

Many aging clocks provide a single measure for the entire body. However, different organs can age at different speeds. One familiar example is the decline in ovarian function that contributes to the biological clock associated with female fertility.