Is hormones such as estrogen and testosterone cholesterol a lipid?

Yes, estrogen and testosterone are lipids. Specifically, they are steroids, which are a type of lipid molecule. Steroids are characterized by their four-ring structure, and they play many important roles in the body, including regulating metabolism, reproduction, and growth and development. Estrogen and testosterone are two of the most well-known steroids, and they are responsible for many of the differences between males and females.