The greening of garlic has two cases, one that people known best is Laba garlic. The green pigment in greening garlic is safe, because it has been proved by diet habitude of several thousand years. And this green pigment has a value to be exploited as a natural pigment. This study has preliminarily researched mechanism of this green pigment formation, and obtains some advances. The results were summarized as follows:(1) Garlic drench greening related to the sort of acid. Only could acetic acid cause garlic ...