The natural hormone FGF21 can activate a hindbrain circuit in mice that boosts energy burning and weight loss without suppressing appetite, pointing to new brain-based strategies for metabolic health.  

Researchers found that clearing senescent “zombie” immune cells reversed fatty liver damage in mice, hinting that targeting cellular senescence may help combat age‑related disease.  

A mouse study suggests abdominal muscle contractions gently shift the brain and boost cerebrospinal fluid flow, hinting that everyday movement may help clear brain waste.  

Having enough vitamin D in your 30s and 40s may matter for how your brain looks decades later.