Sorbic Acid vs Locust Bean Gum: which is worse?

What is Sorbic Acid?

Sorbic acid is an unsaturated fatty acid naturally occurring in the berries of the rowan tree (Sorbus aucuparia). Commercially, it is produced synthetically and used as a broad-spectrum antimicrobial preservative, effective primarily against molds and yeasts, and to a lesser extent bacteria, at acidic to neutral pH.

What is Locust Bean Gum?

Locust bean gum (LBG) is a galactomannan polysaccharide extracted from the seeds of the carob tree (Ceratonia siliqua), native to the Mediterranean. It is a fine white to yellow powder that forms a thick gel when dissolved in hot water. It synergizes strongly with xanthan gum and carrageenan to enhance gel strength.

Documented risks

Sorbic Acid: One of the safest preservatives in use. Sorbic acid is metabolized normally as a short-chain fatty acid and poses no identified carcinogenic, mutagenic, or reproductive risks. The ADI (Acceptable Daily Intake) is 25 mg/kg body weight/day, and typical dietary exposure is well below this threshold. Rare skin sensitization has been reported in cosmetic contexts but is not relevant to food consumption. EFSA and FDA both classify it as safe.

Locust Bean Gum: Generally recognized as safe. EFSA's Panel on Food Additives confirmed the safety of LBG in 2017, noting no concerns at current dietary exposures. It functions as a soluble dietary fiber and can have mild prebiotic effects. No significant adverse effects have been documented in human or animal studies at food-relevant doses.