> Grains is proven to be suboptimal, causing inflammation in the intestines and the rest of the body (http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2821887/).

From the study, it is refined grains that are problematic, while whole grains are recommended:

"In conclusion, whole grain consumption may be related to lower circulating plasma concentrations of PAI-1 and CRP, which in turn could lower the risk of type 2 diabetes and cardiovascular disease. These findings suggest that the protectiveness of whole grains in relation to type 2 diabetes and cardiovascular disease may be due to an effect on plasma inflammatory protein concentrations and reinforces the public health recommendations that whole grains be consumed daily as part of a healthy diet. Refined grain intakes were positively associated with PAI-1 concentrations, indicating that refined grain intake could have proinflammatory effects."