Spermidine is widely recognized for its role in promoting cellular health and longevity. It is commonly used in anti-aging skincare products due to its ability to enhance cell renewal and protect against oxidative stress, helping to maintain skin elasticity and reduce the appearance of fine lines. In the field of nutrition, spermidine is incorporated into dietary supplements aimed at supporting overall health, particularly for its potential to improve cardiovascular function and cognitive performance. Additionally, it is studied for its autophagy-inducing properties, which may help in clearing damaged cells and reducing the risk of age-related diseases. Researchers are also exploring its potential in cancer prevention and treatment, as it may inhibit tumor growth by regulating cell proliferation and apoptosis.