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Related Experiment Videos

Acrylamide in roasted almonds and hazelnuts.

Thomas M Amrein1, Helen Lukac, Luca Andres

  • 1Institute of Food Science and Nutrition, Swiss Federal Institute of Technology (ETH), ETH-Zentrum, CH-8092 Zurich, Switzerland.

Journal of Agricultural and Food Chemistry
|September 30, 2005
PubMed
Summary

Acrylamide formation in roasted nuts is mainly influenced by asparagine content and roasting temperature. European almonds had lower asparagine and less acrylamide than U.S. almonds, while hazelnuts showed minimal formation due to low asparagine.

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Area of Science:

  • Food Science
  • Agricultural Chemistry
  • Toxicology

Background:

  • Acrylamide is a potential carcinogen found in various cooked foods.
  • Nuts, particularly almonds and hazelnuts, are susceptible to acrylamide formation during roasting.
  • Understanding the factors influencing acrylamide levels is crucial for food safety.

Purpose of the Study:

  • To investigate the impact of nut composition and roasting conditions on acrylamide formation.
  • To compare acrylamide levels in almonds and hazelnuts from different origins (U.S. vs. Europe).
  • To identify key precursors and process parameters affecting acrylamide generation.

Main Methods:

  • Analysis of free amino acids and sugars in raw almonds and hazelnuts.
  • Determination of acrylamide content in roasted almonds and hazelnuts.

Related Experiment Videos

  • Correlation analysis between precursor levels, roasting conditions, and acrylamide formation.

    • Main Results:

    • Asparagine was identified as the primary free amino acid precursor for acrylamide in almonds.
    • Roasting temperature significantly influenced acrylamide formation, with higher temperatures leading to increased levels.
    • European almonds exhibited lower asparagine and subsequently lower acrylamide formation compared to U.S. almonds.
    • Hazelnuts showed minimal acrylamide formation due to inherently low asparagine content.
    • Reducing sugars were consumed rapidly but did not significantly impact acrylamide levels.

    Conclusions:

    • Asparagine content and roasting temperature are critical determinants of acrylamide formation in almonds.
    • Origin-specific compositional differences (e.g., asparagine levels) affect acrylamide potential in almonds.
    • Hazelnuts are a lower-risk source of dietary acrylamide compared to almonds under typical roasting conditions.