How long does it take for an allergy to occur after eating a food?

GS88 asked:Ok,I haveallergies topeppers each time I getanallergic reaction ittakes longer andlonger fortheallergy tooccur last time itwasnearly 10 hours aftereating thefood thistime itwas17 hours aftereating thefood. Isthiseven possible? I thoughtreactions occured [...]