At uni I made a friend who seemed to spew heaps. Many social events ended with a quiet, or sometimes a not so quiet, vomit.
In the years following our graduation he figured out he was lactose intolerant and found some pills which allowed him to continue to consume cheese.
Last year I had a similar experience when I realised that eating sandwiches for lunch was the reason I found myself falling asleep mid-afternoon. Once I started eating rice for lunch, I was surprised to find the desire for a siesta disappeared.
Tonight I was thinking about this relationship between food and behaviour and realised I'd eaten sandwiches for lunch for more than 30 years before I realised it was taking a toll. All those years of not paying attention in afternoon classes and then the lost productivity in the workplace and the grumpy moments too.
Wish I'd discovered kimchi and rice earlier because it seems you really are what you eat.