TBH I don't think allergies have only been on the rise since before we have started being careful. That's why we are being careful, because allergies were already on the rise. The truth is that no-one knows why. I personally suspect it is something to do with the increase in chemicals and so forth in our food, and the lack of freshness. But that is just a theory. Certainly there is no evidence that any harn is done by delaying the introduction of some foods.

In terms of peanuts, Jack had his first at just under 3 years as he had a previous food allergy and I didn't want to take a chance. Tom has had a small amount of peanut butter today for the first time at 21 months. I don't regret delaying at all. If in doubt, take the safer option.