I wouldn’t rely on the Whole30 as a reliable source of dietary advice. Their book and website are filled with unscientific information. I’ve reviewed many of the cited claims in the Whole30 book and found that a majority were very misleading or completely false. This diet can substantially mislead people about what proper and healthy eating looks like due to this inaccurate information. You can read some of my chapter reviews of the book here:
The Whole30 approach to elimination and reintroduction of foods is also not appropriately designed in a way that would allow accurate and reliable identification of food sensitivities. For a more evidence-based approach to an elimination diet, you might want to try the one set out by Precision Nutrition found here:
Elimination diets take a lot of time and commitment and shouldn’t be undertaken unnecessarily. Here’re a few additional tips:
1 — You don’t have to eliminate all these foods. If there’s one you think is causing you issues focus on that.
2 — Beware the false positive! When you abstain from eating certain foods for a time, you lose certain enzymes and gut bacteria that aid in the digestion of these foods. Upon reintroduction, you may experience gastrointestinal “symptoms” that are really just due to the lack of said enzyme/bacteria. These will build back up over time as you continue to consume the food. Don’t needlessly eliminate an entire food group without THOROUGHLY testing yourself a number different times.