99% of the time it’s real food and I eat it! One time I was shooting this beautiful chocolate cake and my finger got a little too close and I got chocolate on it. Instinctually I licked it off my finger and it was glue. The only reason the food stylist used glue was that we were doing and action shot with a pour and the chocolate was too thin to get the ribbonny effect we were after. The food stylists are geniuses and realize that most of the time it’s easier to simplify and try real things before getting too complicated.