This is because of the added fining agents used by producers which can contain non-vegan elements such as egg albumen (derived from egg whites), fish oil, and bone marrow, according to PETA.

What are the advantages of using MinimuMM-seq over bone marrow biopsies and FISH? Using this method, clinicians do not need to perform a bone marrow biopsy, which is easier on the patients. However, ...