Potassium sorbate is a food additive which is the potassium salt of sorbic acid. It is mainly used as a food preservative since its acidic nature is effective in inhibiting moulds and yeast growth in food. It exists as a white to yellow crystalline powder. Potassium sorbate was discovered by Frenchmen around 1850. They obtained it from berries of the European Mountain-ash tree (Sorbus aucuparia ), after which the acid is named. It grew first in South and East Asia but now grows in lots of parts of the world.
Potassium Sorbate may cause allergic reactions, it may also result in nausea and diarrhea. It may also cause loss of nutrients in foods to which it is added.(1)
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