Second, ferritin has an inherent tumor‐targeting ability, which can specifically recognize and bind to tumor cells via transferrin receptor 1 (TfR1).[28] Third, ferritin can traverse the blood‐brain barrier (BBB), paving the way for brain tumor therapy.[29] Most importantly, abundant amino acid residues exist on the surface of ferritin that provide potential interactions (e.g., electrostatic interactions and hydrogen bonds) for supramolecular assembly with aminated fullerenes. This evidence concerns the gene TFRC and brain neoplasm.