Fair enough! I'm no stranger to allergies (effectively allergic to my own gut!) but never had any problem with powdered gloves. When you wear them all day every day (or when you are operating and there is potential for transfer to a living subject) I suppose you have different concerns and rightfully so!
As far as I know, powdered are still pretty normal for food prep though, aren't they?.... stand to be corrected!
Personally I buy non-latex whatever I can get cheap (powdered or non) a batch load at a time and I wear them for gralloching, working on machinery and herpatological purposes. But obviously like all things you can buy too cheap....