This is from Epicurious. Go ahead and eat your blue garlic! > Garlic contains anthocyanins, > water-soluble pigments that turn blue or > purple in an acid solution. While this > color transformation tends to occur more > often with immature garlic, it can differ > among cloves within the same head of > garlic. > > The bad news is that the acid-soaked > garlic looks like something a Smurf might > serve at their dinner table. The good news > is that the garlic flavor remains > unchanged (except for the flavor of the > acid) and is totally edible without bodily > harm. BTW, anthocyanin is an antioxidant, so not only will it not hurt you, it might even help! Alex