This document summarizes key information about aging populations globally and the health challenges associated with an aging population. It notes that the global population over age 60 will nearly double between 2015 and 2050. By 2050, 80% of older people will live in low- and middle-income countries. It also discusses the physical, mental, and social challenges that often accompany aging, such as hearing loss, dementia, isolation, and abuse. The document emphasizes that aging is diverse and that environmental and personal factors can influence health inequities and outcomes for older adults.