Just purchased my Xmas prawns and thinking to avoid any additives, I always buy 'Australian' uncooked prawns. As I purchased 2Kg they came in the original box and shock, horror, I see preservative ticked, and then 223 (sodium metabisulphite). This product was labelled 'Wild caught Australian frozen prawns' from Hervey Bay - all sounds so pristine!

I rang the fish man morning and he informs me that all prawns are treated with 223 to prevent discolouring. This is common practice across the industry, the only difference being that imported prawns may not declare the preservative on the packaging. I phoned the Health department who were completely unaware of this practice. I suggested that as processed foods have to have labelling of ingredients what of the 'fresh' product?

An asthmatic with sensitivities to the sulphur group of preservatives may well react to prawns and then assume this is a seafood allergy, as preservative would not be considered a factor. Imagine if all those wonderful sea food displays at this time of the year were labelled 'contains sulphur metabisulphite'! – Judy, Vic