AbstractThe HeLa cell line was created in 1951 without consent from Henrietta Lacks, the person whose tissue sample was used. In 2021, the descendants of Henrietta Lacks sued a well-known biotechnology company for the profits it made from the HeLa cell line. In this article, ownership of the cell lines is investigated from a South African legal perspective by considering three possible contemporary scenarios bearing points of similarity to the Henrietta Lacks case. In the first scenario, informed consent is obtained to use a tissue sample for research and to commercialize the products of such research; in the second scenario, informed consent is materially deficient because of an honest mistake on the part of the research institution; and in the third scenario, informed consent is materially deficient due to willful disregard of the law on the part of the research institution. In the first two scenarios, ownership of the cell line created from the tissue sample would vest in the research institution, and the research participant would not have any legal action for financial compensation. However, in the third scenario, ownership of the cell line would vest in the research participant, who would be able to claim all profits made from trading the cell line. Whether the research institution acted in good faith is therefore a crucial determinant of the legal outcome.