Ask HN: Review my idea- Grocery Items search

My son has serious food allergies and I always find it problem to find him something interesting to eat when we are out. When we are in a grocery store, I currently have no way find out what items have what ingredients inside them.

What if a Grocery items search engine that took a query like "-milk -eggs" and gave all items that do not contain milk and eggs.

Then there's the question of which products that are sold in your area are manufactured in a facility that also processes food items which while they may not be part of the ingredient list per se, but may have traces present from having shared manufacturing equipment. Seems a lot to keep track of. But not impossible.

I wouldn't worry about that. If it came to the level that Google would try to copy this feature, I would already term it a success. What I am more interested in finding out is whether it will be useful to anybody in the world and how big of a problem it is.