We picked up some of these blueberry/yogurt candies at Trader Joe’s, which didn’t really merit a mention until we looked at the ingredients list:

Well, now, that is interesting. The last ingredient in the list is red cabbage extract, “for color.” But… red cabbage is one of those pH-indicating substances (Link 1, Link 2), that happens to make a pretty good DIY version of litmus paper.

So… if these candies have red cabbage extract for color, do we really have litmus candy?
Continue reading Everyday science: Litmus candy →