Real households aren't dietary-uniform. One person's vegetarian, someone else is avoiding gluten, and someone else has no restrictions at all — and a single shared list somehow has to serve all of it without turning into three separate shopping trips.
The same tags used to organize any shared list work just as well for dietary needs — mark items "veg" or "gf" and whoever's cooking for that person can filter straight to what applies, instead of re-deriving it from memory every week.
The shared list covers what the household eats together. Anyone's own specific items — their own snacks, a particular brand they need — stay on their own personal list, private from the rest of the household. It's the same personal-plus-shared split that already works for roommates keeping their own groceries separate from a shared "House" list.
Tags and personal lists are both free on every Shopolit plan. Get started free.
Not as a dedicated feature — the same general-purpose tags and personal/shared list split that solve other household coordination problems handle this one too, without needing a specialized "diet mode."
Yes — anything that's only yours (a specific brand of gluten-free bread, your own snacks) can stay on your personal list, entirely separate from what's shared with the household.