Yesterday I mentioned that Spinach probably looks at Kale the way Britney Spears looks at Taylor Swift. Sooner or later, all foods lose their pop star status. Consider the case of cottage cheese and its replacement at the top of the charts by Greek yogurt.

+ Food trends change. So do marketing messages. There was a time when one the benefits that Pepsi touted was its abundance of calories — even more than a lamb chop.