There's increasing evidence that it is lack of exposure to some allergens which causes problems. Current advice is to eat peanuts during pregnancy and to introduce peanut butter to baby diets early to reduce the risk of peanut allergy.

So you're more likely to be reducing the risk. But there's a lot we don't properly understand yet, of course.

Simple summary article: Give babies peanut butter to cut allergy by 77%, study says

There had been long-standing advice to avoid foods that can trigger allergies during early childhood. At one point, families were once told to avoid peanut until their child was three years old.

However, evidence over the last 15 years has turned that on its head.

Instead, eating peanut while the immune system is still developing - and learning to recognise friend from foe - can reduce allergic reactions, experts say.

Most allergic reactions start with milder symptoms, and some get worse each time you’re exposed. You would probably notice (and hopefully see a doctor about) the burning/itchy/numb mouth and throat, and/or upset stomach, before it progressed to a lethal allergy

everyday

This means 'unremarkable' or 'common' or 'ordinary'

every day

This means 'daily'.

Good luck .

tl;dr no, i don't think newly developed allergies can kill you. #notadoctor

did you have a peanut allergy earlier on? personally always had a mild allergy to basically everything. now i live with cats, who make it worse, but before that i was always sneezing and my eyes were going bonkers, regardless.

Possible, yes. Not likely though with most things if you have them regularly - your body kind of recognises it as something that isn't a threat.

I'm of the opinion that more often than not allergies are your body reacting to the wrong thing. Take seafood allergies for example. The first time your face swells up and gets itchy after eating seafood isn't the time you had bad seafood - that happened the time before. When you ate the bad seafood, your body reacted and got over it with minor fuss. However, it then tags seafood as the cause of what happened, and the next time you eat seafood you have an allergic reaction.

It is also sometimes possible to overcome allergies, although this is incredibly difficult.