The nuclear magnetic resonance fat analyzer is a desktop nuclear magnetic resonance analyzer based on the principle of nuclear magnetic resonance. This technology distinguishes the body composition signals of different relaxation rates, thereby achieving rapid and accurate quantitative measurement of body composition (fat mass, muscle tissue content, free water volume, and whole body water volume) of living animals. It can measure dozens of animals ranging from as small as 2 mg fruit flies, organs, mice, rats, birds, to humans. Compared with other methods, nuclear magnetic resonance body composition analysis has a faster measurement speed (only 0.5-3.0 minutes) and does not require anesthesia or