The simultaneous inhibition of histidine on 5-hydroxymethylfurfural and acrylamide in model systems and cookies.

• His decreased the concentrations of HMF and AA in model systems and cookies. • Competitive reaction between Asn and His with Glc attributed to AA inhibition. • His eliminated the formed HMF via the carbonyl–amine reaction. • His eliminated two AA molecule via the Michael addition. 5-Hydroxymethylfurfural (HMF) and acrylamide (AA) are neoformed food contaminants. In this study, the simultaneous inhibition of HMF and AA by histidine (His) were investigated. In the asparagine (Asn)/glucose (Glc) model system, the inhibition ratios of HMF and AA were in the range of 28–58% and 0–71% when 20 mmol/L His was added. In cookies, His also exhibited excellent inhibition effects on both HMF and AA. At the His concentration of 2% (w/w), the inhibition ratios of HMF and AA reached 90% and 65%. Additionally, the sensory quality of cookies was not affected significantly. Qualitative results suggested that His inhibited the formation of AA by the competitive reaction between His and Asn for Glc, as well as directly eliminated the formed HMF and AA via the carbonyl–amine reaction and the Michael addition, respectively. This study revealed that His could be applied for the inhibition of HMF and AA in heated food. [ABSTRACT FROM AUTHOR]