would be useful to have custom tags

It would be useful to have custom tags, for example to mark items compliant or non-compliant with a special elimination diet, like AIP or SCD. Then for this to be useful, would need to have fields with the tags in an export CSV, so can filter on it in a spreadsheet, for example to retrospectively analyze instances when we were non-compliant with the diet, and possibly correlate that with records of symptoms.

Are the tags on foods currently of any use, I don't think so? For example to filter by tags, etc.