Time-restricted eating and longer daily fasting times improved health and longevity independent of calories or diet composition in male mice.
It is much more challenging to study the effects of time-restricted eating on longevity in humans but other biomarkers of health have been measured. For example, time-restricted eating within a 6-hour window without reducing calories or losing weight improves insulin sensitivity, beta cell function, blood pressure, oxidative stress and reduces evening appetite.
Dr. Satchin Panda has discussed many benefits of time-restricted eating a couple of times on my podcast. You can check those out on the episode page.