The definition of ultra-processed foods is not precise, allowing for significant variability.

“There's not a right there's not a correct definition of ultrarocessed. You can define it any way you want. The words mean what they say we say they mean. Once you've defined it clearly then we can say what's its value? What is it? How can we use it? What's its utility? Second thing I would say is as with any category, if it permits a lot of variability in that category, which Ultrarocess certainly does, it starts to get a little silly to talk about the overall category because you say, "So, wait a minute. You want me to consider a meal replacement shake in the same category as I consider a Big Gulp in a 7-Eleven? In the same category I consider a chocolate bar. In the same category I consider uh TPN nutrition. You know these are all arguably ultrarocessed and very different things."”