[danepowell]

I think they are referring to autophagy, which is upgregulated during fasting.

Sure autophagy is an important process in cellular "cleansing", if you want to use the pop definition here. But more autophagy != good outcomes, generally speaking. For instance, too much autophagy is associated with reduced cellular division and growth.

It sounds like someone just did a s/cleansing toxins/autophagy/ here to make this sound more science-y.

Note, I am NOT saying that there's no value in fasting. There certainly could be. I'm just saying that the article seems to be playing a bit fast and loose with the science.