Posted on 09 Oct 2009
Is this legal? Unusually red tuna may have been treated with carbon monoxide
Is the tuna being sold at our supermarkets fresh? STOMPer Queen suspects that some supermarkets may be selling carbon monoxide treated tuna as the fish seems a little more vibrant in colour than non-treated fish should.
The senders says that carbon monoxide treated tuna is prohibited in Singapore and thus wonders if these tuna products sold are legal.
If untreated, the tuna should appear brownish-red due to oxidation.
In an email, STOMPer Queen says:
"I have seen such products being served in some Japanese and seafood restaurants for a long time now.
"It's only very recent that I began noticing frozen and thawed tuna steaks available at certain supermarkets.
"They appear to be pink (frozen) and pinkish-red (thawed). Untreated tuna should look brownish-red, lacking the vibrant colour due to oxidation.
"Carbon monoxide treated tuna is not allowed in Singapore as according to the AVA.
"Such treated tuna is usually processed in countries like Indonesia, Vietnam and Thailand using the technique of gassing or injection.
"The end products appear vibrantly pinkish red and may mislead consumers into thinking that they are fresh!"
Is this legal? Unusually red tuna may have been treated with carbon monoxide
Is the tuna being sold at our supermarkets fresh? STOMPer Queen suspects that some supermarkets may be selling carbon monoxide treated tuna as the fish seems a little more vibrant in colour than non-treated fish should.
The senders says that carbon monoxide treated tuna is prohibited in Singapore and thus wonders if these tuna products sold are legal.
If untreated, the tuna should appear brownish-red due to oxidation.
In an email, STOMPer Queen says:
"I have seen such products being served in some Japanese and seafood restaurants for a long time now.
"It's only very recent that I began noticing frozen and thawed tuna steaks available at certain supermarkets.
"They appear to be pink (frozen) and pinkish-red (thawed). Untreated tuna should look brownish-red, lacking the vibrant colour due to oxidation.
"Carbon monoxide treated tuna is not allowed in Singapore as according to the AVA.
"Such treated tuna is usually processed in countries like Indonesia, Vietnam and Thailand using the technique of gassing or injection.
"The end products appear vibrantly pinkish red and may mislead consumers into thinking that they are fresh!"
