Microvascular Aging

Microvascular aging refers to age-related structural and functional decline of small blood vessels that supply tissues with oxygen and nutrients. With aging, capillary density decreases, endothelial function deteriorates, and vascular responsiveness is reduced. These changes impair tissue perfusion and limit efficient exchange of gases, nutrients, and metabolic waste. Microvascular aging contributes to reduced organ reserve, delayed healing, and increased vulnerability to ischemic injury. Chronic inflammation, oxidative stress, and endothelial senescence drive microvascular dysfunction. Because microvasculature supports every organ system, its decline amplifies systemic aging effects, including cognitive impairment, muscle weakness, and renal dysfunction. Microvascular aging also disrupts inter-organ communication and metabolic regulation. Understanding microvascular aging highlights the importance of maintaining vascular health at the smallest scale to preserve tissue function, resilience, and overall healthspan during aging.