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Sodium nitrate is a type of salt that happens to be a particularly effective food preservative. A naturally occurring mineral, sodium nitrate is present in all kinds of vegetables (root veggies like carrots as well as leafy greens like celery and spinach) along with all sorts of fruits and grains. Basically, anything that grows from the ground draws sodium nitrate out of the soil.

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Roxane Bode

Lvl 10
3y ago

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