I understand that ham and preserves are a thing, but bacteria feeds on carbs. Does it only work because you’ve sealed the food in a vacuum?
In: Biology
To understand this, you need to know about osmosis: osmosis means that water will flow from low salt or low sugar regions to high salt/high sugar regions.
When a bacteria cell, which has a low amount of salt/sugar in it, touches something preserved with salt, it’s moisture is drawn out and the bacterium dies from dehydration (same as we humans would if we drank salt water). Preserving with sugar works much the same way.
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