The German Constitution guarantees freedom of scientific research. This guarantee raises questions, such as its legal definition and scope, as well as possible conflicts with other constitutional rights. This Article suggests that in order to have normative legal consequences, the constitutional concept of science must have an ethical dimension—the importance of the value of research and research for nonbiased “truth.” Such an ethically-loaded definition of science gives rise to internal restrictions, by placing forgery, manipulation, plagiarism and other forms of improper scientific practice outside the scope of constitutional protection. Restrictions to constitutional protection can also be derived from other constitutional rights, such as the right to privacy, environmental protection, and the life and health of others. Another arguably important restriction is derived from the right to human dignity, particularly as it touches upon biomedical questions of human cloning and embryo research. This paper argues that the Kantian proscription of treating human beings as a means to an end, which lies at the heart of the right to human dignity, imposes significant restrictions on current trends in biomedicine. These restrictions warn against an implicit utilitarianism that devalues the rights of vulnerable human beings.