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There should be no preservatives in UHT milk. UHT is a heat treatment of roughly 142°C for 2 - 3 seconds that kills all pathogens and spoilage organisms. The reason for the long shelflife is due to very low bacterial presence and special packaging. The packaging keeps out light, air and bacteria and helps to keep the milk from being spoiled.

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10y ago
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Q: Does UHT milk when packaged in Tetra packs have any preservatives to maintain a shelf life of approx 6 months?
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