Abstract
Despite a potent antimicrobial activity, garlic (Allium sativum L.) has not been used as a commercial food preservative because of instability of the antimicrobial activity, among other reasons. Factors influencing the stability of thiosulfinates in garlic were investigated to improve understanding of the antimicrobial activity of garlic in food preservation. As temperature, pH, the garlic concentration, and the liquid oil content increased, the stability of thiosulfinates decreased. Thiosulfinates were more unstable as the degree of unsaturation of fatty acids was increased. Solid fatty acid did not affect the stability of thiosulfinates. Other major food components, such as free amino acids, proteins, and carbohydrates did not influence the stability of thiosulfinates. Garlic can be used as a natural preservative for food items with low pH values and with low oil contents stored at low temperatures.
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