In the process of N-nitrosamine synthesis, the inhibitory effect of different anthocyanins on the synthesis of strong carcinogen N-nitrosamine was studied. The results showed that when the content of anthocyanins was less than 0.8 mg/m L, the inhibitory effect became more and more obvious with the increase of the content of anthocyanins added, when the content of anthocyanins was 0.8 mg/m L, the inhibition rate was 62.184% and the inhibitory effect was the most significant, when the added amount was greater than 0.8 mg/m L, the inhibitory effect remained unchanged. Porphyra moss anthocyanins h...