In the Glee 'Home' episode, Sue Sylvester revealed that she was on a Master Cleanse diet and had lost 12 pounds in four hours. However, when Rachel Berry asked her what was in it, Sue responded with a list of bizarre ingredients such as cayenne pepper, lemon juice, and grade B maple syrup, but no mustard. Rachel then proceeded to add mustard into Sue's drink, causing her to spit it out in disgust.