Beer Alcoholic

Can minors buy alcohol-free beer in California?
I bought a Coors alcoholic drinks in a beer without 18, without club alcohol. I notcied that beer contains a little alcohol light (not enough to make a person, however). Is it illegal to buy this in a store at the age of 19?
It is not illegal to ask the store if I sell. The thing is, because some 'no alcohol' beverages contain a trace amount of alcohol, Some establishments still wants the buyer to 21 just to be on the safe. However, I usually can buy beer without alcohol without being 21. state law Michigan has to be 18 and Pennsylvania says it has to be 21. The easiest thing to do is check with the store.
Moussy Beer [non-alcoholic] (1984)