Eliminating Wheat is a good idea. But also, anything with sugar or high fructose corn syrup.
Those fad diets are based on junk science.
There's lots of evidence that HFCS is worse than sugar. Americans use a lot more HFCS than other nations, including Canada. The reason: corn production is subsidized, and there are trade barriers on sugar. Sugar is a lot cheaper here in Canada, because we don't have special trade barriers to protect the sugar industry (yes, we have a sugar industry). Therefore, food processors use more of it here, than they do in the U.S. For instance, soft drinks in the U.S. are sweetened with HFCS, while the same brands use sugar in Canada.
IOW, government interference in the market has created conditions leading to more obesity. The liberal answer? More government interference. Irony? (No, just more wrinkles.)