Link between diet and behavior

As much as I'd like to remain ignorant of the link between what I eat and how my child acts, it's obvious to me. He's a good kid, even when he's irritated, he goes from stellar to just average. But that decline is noticeable to me, mommy, who sees him all day every day. I had a gig last night, and they give me this most fabulous pasta afterwards that I normally can pretend I don't notice dairy in. It always separates the next morning and appears translucent, but last night, it was creamy and milky so I knew. I ate some anyhow, and this morning, my baby was off the chain. We Skyped with his grandparents and he could barely sit still, barely make eye contact, climbed on everything every second and just ran non-stop. As much as I get frustrated with having a baby with gastro challenges, I wonder how many people also have kids very sensitive to diet and just never noticed that the spastic fits match up with what's eaten?