Silicon carbide is a well-known semiconductor with excellent biocompatibility and at least two factors contribute to this favorable characteristic. The first one is that the compound does not contain heavy metals which tend to be detrimental to the human body, and the second one is that neither silicon nor carbon causes deleterious effects such as cytotoxicity. Therefore, silicon carbide is very promising in the biomedical field having many potential cardiovascular and orthopedic applications. In addition, luminescent silicon carbide nanocrystals may be good light emitters in biological imaging.