Kaytee likes to add sugars (in form of fruit and molasses, for example) to most of the hamster foods, so it wouldn't be suitable for winter whites / campbells / hybrids. Some of the foods are more "junk food" than others, like Kaytee Fiesta Max, in my opinion. I suppose some of its range is okay, and where it has low protein, you could always supplement with other sources of protein like mealworms, tofu, etc. (need to have 17+% of protein, and many Kaytee seed mixes have 13-14%). Hazel Hamster and Ecotrition Organic are good US foods. If you have a syrian, try Hazel Hamster
(Petsmart) Mazuri and Kaytee Forti Diet Pro Health pellets could be ok for a syrian or a robo too (high protein, but they do have that added sugar).