The flip side of “cleanse diets don’t do anything” is that if you tried a cleanse diet and you did experience a notable reduction in fatigue, joint pain, and general blarginess, you need to talk to an allergy specialist, because there’s nearly a 100% chance that means you have an undiagnosed allergy to some component of your customary diet.
This is an excellent point and I’d imagine there’s a lot of quack diets that continue circulating and getting press based on this exact principle.
Absolutely – a great many diets of the “stop eating everything except these three foods” variety are 100% trading on the fact that they’re practically guaranteed to generate some positive testimonials by virtue of coincidentally cutting somebody’s undiagnosed food allergy out of their diet.