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Potassium sorbate is a natural compound found in a multitude of fruits and vegetables, and ours is a natural derivative sourced from Mountain Ash Berries, and not synthetically derived. However, it is worth mentioning that even the synthetic version is GRAS (official classification of Generally Recognized As Safe) A food grade designation by every government in the world, and has been subjected to any number of double-blind studies. Today it is considered one of the safest food preservatives, and is found in almost every bit of commercially sold cheese, wine etc. Even the organic versions.
To help us understand why potassium sorbate is so ubiquitous, let’s take a look at the chemistry. The sorbate ion from potassium sorbate as a deprotonated carboxyl group which is largely responsible for the antibacterial activity. Another important note about the structure of this molecule is its relatively short carbon chain. Molecules such as potassium sorbate and sodium acetate tend to be more powerful antimicrobial agents compared to their longer-chain analogues.