We have no family history of allergies. DS had peanut butter around 12 months but doesn't really like it and so it isn't a favourite. He has my nutella on toast though He also eats nuts (mostly cashews) which is against the current schools of thought. However the other viewpoint is that he has teeth / molars and can chew so it is ok to give them. He eats them under supervision.

There is significant debate about when to introduce potential allergens and there is no clear answer. The literature does not give anything definitive either. There are guidelines but these change. You need to do what you are comfortable with and monitor for any signs of reaction such as swollen lips / tongue or a raised red rash which is common for ingested allergens.