Food coloring, or color additive, is any dye, pigment or substance that imparts color when it is added to food or drink.
They come in many forms consisting of liquids, powders, gels, and pastes. Food coloring is used both in commercial food production and in domestic cooking.
Food colorants are also used in a variety of non-food applications including cosmetics, pharmaceuticals, home craft projects, and medical devices.
There is no harm in it, but it isn’t something that should be fed to guinea pigs. But if for some reason they do eat, it shouldn’t harm them.
For more foods that guinea pigs can and can’t eat, check out our GUINEA PIG FOOD LIST.