Wheat
The grain everything turns on: Gundry's chief villain because of gluten and the lectin WGA, yet clearly risk-lowering as a whole grain in cohort evidence. The real divide, though, isn't between camps — it's between whole grain and refined flour.
Nutrition
Macros
Vitamins
Minerals
Dr. Gundry
Wheat is Gundry's most prominent target. Two lines of attack: gluten (which he blames, beyond celiac disease, for broad gut-barrier stress) and above all wheat germ agglutinin (WGA) — a lectin he credits with binding insulin receptors directly and driving inflammation. He rejects modern high-yield wheat entirely and points fans, at most, to ancient einkorn or sourdough fermentation as a compromise.
Dr. William Li · 5×5 system
For Li, what counts in wheat is almost entirely the whole grain: bran and germ supply fermentable fiber for the microbiome and lignans with antioxidant, DNA-protective effects. Refined white flour strips out exactly those fractions — for Li, refined wheat is practically a different food from the whole grain.
Biolazar evidence
The whole-grain evidence is strong: roughly 15–20 % lower cardiovascular and all-cause mortality per ~90 g/day (Aune 2016). But those figures apply to whole grain, not refined flour — white-flour products behave metabolically more like sugar (high GI, little fiber). Gundry's WGA thesis is described mechanistically but, outside celiac disease and diagnosed wheat sensitivity, has little robust clinical-endpoint data in healthy people. Bottom line: the lever that matters is whole grain vs. refined, not wheat yes/no.
How to use
If wheat, then whole grain: wholemeal bread, bulgur, cracked wheat instead of white-flour baked goods. Sourdough fermentation breaks down part of the FODMAPs and lectins and improves tolerance. The intact kernel (wheat berries, bulgur) has a much lower glycemic index (~45–48) than flour milled from it (white bread ~75). With celiac disease or confirmed wheat sensitivity, avoid entirely.
