Humic acid (HA) has been shown to be a toxic factor for many mammalian cells, however the specific mechanism of the cytotoxicity induced by HA remains unclear.

• 腐植酸已经被认为对许多哺乳类细胞具有毒性，但是至今为止还不知道腐植酸对于细胞特有的毒理机制。