Japanese to English Other Medical (general)

I'm translating a medical document in which a group of students ate miso soup at a school cafeteria which was contaminated with a toxic substance. The context of 具のみ is that there's a chart which lists how much miso soup each student consumed.

I would normally think of 具 as being the ingredients which were prepared in advance and one would just add water to?
So would one translate 具のみ as "ingredients only"?
And later in the chart, another student consumed "具 1/2"... which confuses me more, because "half of the ingredients" wouldn't make sense. (Also it would be somewhat odd for a student to be eating the miso paste on its own, so I think I've misunderstood something here!)

Thanks so much