RE: Sugar, An Important Component of Food Products

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Sugar, An Important Component of Food Products

in food •  7 years ago 

Thank you for a good post. Just want to add, marmalade and jam are not the same (except for the added peels in marmalade). The water activity is lower in the marmalade, which make it more resistant to mold. If the marmalade starts to mold you can simply take a spoon and remove the mold and the marmalade can be eaten. This can't be done with jam.

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Thanks for the appreciation. Water activity is very low in both products. But if mold grows in any product it will not be eatable because mold produces toxin and that is present in whole product, can cause food borne illness.

Actually the toxin is in the aqueous phase, and in marmalade the water activity is so low that the toxin will not spread to the rest of the marmalade. This requires that there is sufficiently much sugar in the marmalade so that the water activity is low enough.