pianocello 

Anything you purchase with the 'COR', or a 'U' or a 'K' in a circle, plus many other symbols certify a food 'kosher'.  See this link for a list of all the symbols;

http://www.cor.ca/view/85/cor_kosher_symbol_card.html

A quick unscientific survey of the food in my cupboards showed that well over half of what I buy is certified kosher by one group or another. 

I actually had a friend tell me his father considered the costs of all this 'certification' to constitute a 'kosher tax' and that he was the using it as a tax deduction, but my research into the subject found it to essentially be a hoax.  Here is a link to a wiki page on the subject;

https://en.m.wikipedia.org/wiki/Kosher_tax_conspiracy_theory

I am not a member of any faith so I really have no feelings either way about the issue of labeling a food kosher, but I thought I could help clear the air on the subject.