 Clinical trials can be costly for both patients and researchers, especially those who come from lower socio-economic backgrounds. This can lead to a lack of diversity among participants, as people from these backgrounds may not be able to afford the costs associated with participation. Additionally, some studies require participants to pay for ancillary medical services, such as transportation and childcare, which can further increase financial burden. In order to ensure greater diversity in clinical trials, it is essential to provide adequate compensation for participants' time and effort, as well as reimburse them for any out-of-pocket expenses related to their participation. This article was authored by Barbara E. Beer, Sarah White, Luke Jolinas and others.