Long-term impact of caloric restriction on liver health and cell survival in a mouse model

Gökçe and colleagues followed 97 male C57BL/6 mice in ad-libitum, chronic caloric-restriction and intermittent-restriction groups. Chronic restriction reduced intake by 25%; the intermittent group alternated three weeks of unrestricted feeding with three weeks at 50% restriction. At 49 weeks, the restricted groups had higher hepatocyte caspase-3, a marker of apoptosis, than controls. At 85 weeks, chronic restriction was associated with higher BCL-2 in Kupffer cells, an anti-apoptotic signal. The abstract presents these as age- and regimen-dependent liver responses rather than a simple claim that restriction uniformly improves or harms the liver. The work matters because caloric restriction is often treated as a single intervention, while dose pattern and tissue context can change the biology. It remains a mouse preprint, uses only male animals, and reports molecular markers rather than human liver function, frailty or survival. The findings do not weaken the human caloric-restriction evidence base by themselves, but they argue for careful interpretation of tissue-specific mechanisms.

Caloric restriction may exert age- and regimen-dependent effects on liver cell survival pathways.