In vivo studies refers to clinical and scientific research studies executed in living organisms such as humans or animals. This as opposed to in vitro studies, which are performed in a test tube in a laboratory setting with tissue or cell cultures. In Vivo studies require rigorous regulatory review and approval by the In vivo studies refer to research executed in living organisms such as humans or animals, as opposed to in vitro studies which are performed in a test tube in a laboratory setting with tissue or cell cultures.

This type of studies require solid regulatory review and approval by ethical committees. Clinical trials with pharmaceutical components need to be executed according to requirements of Good Clinical Practice, which is important for the protection and safety of the human subjects involved in the study, as well as to guarantee the integrity of the study data. More and more, the relevance of adhering to GCP guidelines is acknowledged for human studies investigating health effects of dietary ingredients.