美国国家老龄化研究所（NIA）是美国国立卫生研究院的27个研究所和中心之一，1974年，国会授权成立NIA，在老龄化研究，培训，健康信息传播以及与老龄化和老年人相关的其他计划中发挥领导作用。该立法的后续修正案指定NIA为阿尔茨海默病研究的主要联邦机构。

NIA旨在了解衰老的性质和衰老过程，以及与变老相关的疾病和病症，然后通过临床试验得到更多信息，用以延长人们健康，活跃的生命岁月，提高老年人的生活水平。与此同时，NIA的研究进一步加深了人们对衰老本质的理解，为老年人的健康提供了极大的帮助。

The National Institute on Aging (NIA) is one of 27 institutes and centers of the National Institutes of Health, and in 1974, Congress authorized the establishment of the NIA to play a leading role in aging research, training, health information dissemination, and other programs related to aging and older adults. A subsequent amendment to the legislation designates the NIA as the primary federal agency for Alzheimer's disease research.

The NIA aims to understand the nature and aging process of aging, as well as the diseases and conditions associated with aging, and then get more information through clinical trials to extend people's healthy, active life and improve the standard of living of the elderly. At the same time, NIA research has further deepened people's understanding of the nature of aging, providing great help for the health of the elderly.