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The antimicrobial activity of sorbic acid and its salts is attributed to their undissociated acid molecule. And therefore their efficacy is pH-dependent. The upper limit for its inhibitory activity is at 6.5 in most applications. The lower the pH, the better as a result of more undissociated sorbic acid. However, this upper limit can be raised in low water activity-solutions.
3. Sugar Alcohols Sugar alcohols, such as xylitol, erythritol, and sorbitol, are neither wholly sugar nor fully alcohol. They are used primarily in sugar-free products, such as gum and candy, and provide a sweet taste with fewer calories than traditional sugar. While they do not cause a spike in blood glucose levels as sugar does, they can cause digestive discomfort if consumed in large quantities.
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