How preservatives stop food from spoiling on your grocery store shelves

Are food preservatives bad for you? - Eleanor Nelsen · 4:53 · Video: TED-Ed · Watch at the source

In short: Food naturally decays through mold, browning, and bacterial growth. This video explores how preservatives intervene to keep common items like bread and mayonnaise edible for much longer periods.

Food is inherently unstable; bread can mold in days, apple slices turn brown, and bacteria can multiply in mayonnaise. Preservatives act as a defense against this natural process of decay. Eleanor Nelsen investigates the fundamental mechanisms these substances use to maintain food edibility and addresses the critical question of whether they are safe for human consumption.

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