Unfortunately the grains of the 21st century are not our grandparents grains, talking about wheat. It is now so modified for uniformity and high yield it has way more stuff in it than it ever had,
I've cut out most wheat from my diet, lost a kilo without trying, hubby lost three. Everything works better, including that peristalsis...
Also the knock on and probably a good contributing factor is that we don't eat as much cake and cookies, so added sugar had gone down too.
I've discovered pulse pasta, pretty good...corn and rice cakes, not bad, found a good source of gluten free bread.
But hey, a $3.50 bag of hot chips with salt from the take out is still yummy!