Sodium nitrite is toxic, which is the main component of industrial salt. fake salt is mostly made of it, which is harmful to the body. The toxic effect is to paralyze the vascular movement center, respiratory center and surrounding blood vessels. Form methemoglobin.

Monascus is a legal food pigment, which is harmless. Potassium sorbate is a food preservative used all over the world, which is harmless.