Obesity in young adults causes "hidden" brain damage decades before symptoms appear, creating a serious problem for memory. ASU researchers found that obesity triggers inflammation and liver stress, leaking a protein called Neurofilament light chain (NfL)—a sign of injured brain cells. To solve this, the study highlights the power of choline, a vital nutrient that protects neurons and lowers inflammation. The benefit is that by eating choline-rich foods like eggs and broccoli, young people can shield their brains and lower their future risk of Alzheimer’s.