No, it's religious babble interpreted as godsent scientific knowledge. Sorry. Considering that pigs and their various relatives have been a mainstay of many different civilization's herds, even that "knowledge" is more cultural than scientific. There's various studies showing that wheat products are not beneficient to a human's diet. You know, knowledge we got through disciplines like biology and nutritionists. The same scientific work that confirmed (cough) that pork could be bad for you. I guess Allah decided to skip that one. Maybe cause pigs are objectively disgusting creatures and wheat was used since, oh, the beginning of agriculture. It was always more a matter of symbolism than any sort of scientific thought behind it.
