The instability there is even though all places are run by same or similar regulations, regulatory bodies, there's still room to interpret how that is implemented in operation. Some people function *better* on the inside because of that regulation with regard to diabetes because food and meds are on a medical schedule for the individual.
But for contamination it's hell. I don't have a better word for it than that. For perspective I can tell you I'm not sure I could manage allergens and make personal safety and group safety paramount knowing what I know about food prep. Then there's the transport of the food by staff that is on their toes making sure safety and order first... you see contamination, compelling a hand wash, that becomes a no-win situation because then it becomes a power play game as it does with anything on the inside.
Think big, bored, violent toddlers with adult brain, street smart PhDs. That's not even covering what it takes to get through to a deputy who in order to stay alive, in one piece and unmolested, is going to assume you're at something or having a panic attack which happens often enough. I mean you really, REALLY have to watch out for your own butt, the butt of co-workers and the collective butts in custody. Nothing can put everyone at risk for a riot then everyone is f'd.
It's not that they don't care, they do, but the circumstances are such that life threats are literally everywhere all the time. It's one more that, while urgent, has to be done treated where proximal danger is already omnipresent, they'd have to figure out if it's a ploy or real. 99.999% is ploy and falling for the wrong one could also get someone killed.
I would think they should take the Allergic Girl model where she shows the cost of investing in protocols and equipment to avoid contamination is lower than not. Hiring outside catering per meal or flagging that for a dedicated person to manage in a kitchen would probably have to happen. Then the jail commander is going to have to deal with protocols for recognition and getting medical in which is faster than getting the person out to medical. Possibly.
Overall I don't think they have ANY tools on how to deal with FA.