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Plant lignans in soy-based health supplements.

José L Peñalvo1, Satu-M Heinonen, Tarja Nurmi

  • 1Department of Clinical Chemistry, University of Helsinki, Biomedicum, PO Box 63, 00014 Helsinki, Finland. jose.penalvo@helsinki.fi

Journal of Agricultural and Food Chemistry
|June 24, 2004
PubMed
Summary

This study identified six plant lignans in soy supplements for the first time, finding a positive correlation between lignan and isoflavone levels. These findings aid in understanding soy supplement composition and health benefits.

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Area of Science:

  • Phytochemistry
  • Nutritional Science
  • Food Analysis

Background:

  • Soy-based health supplements are popular for their isoflavone content.
  • The presence and levels of plant lignans in these products have not been previously reported.
  • Plant lignans are bioactive compounds with potential health benefits.

Purpose of the Study:

  • To identify and quantify plant lignans in commercial soy-based health supplements.
  • To analyze the isoflavone content of these same supplements.
  • To investigate the relationship between plant lignan and isoflavone levels.

Main Methods:

  • Gas chromatography-mass spectrometry (GC-MS) was used for identification and quantification.
  • Analysis included six specific plant lignans: secoisolariciresinol, matairesinol, syringaresinol, lariciresinol, isolariciresinol, and pinoresinol.

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  • Quantification of isoflavones was also performed.

    • Main Results:

    • Six plant lignans were identified and quantified in 14 different soy-based supplements.
    • A positive correlation was observed between the levels of plant lignans and isoflavones.
    • Comparative data on lignan and isoflavone levels in raw soybeans and supplements were provided.

    Conclusions:

    • This is the first report detailing the presence of specific plant lignans in soy supplements.
    • The co-occurrence and positive correlation suggest a link in their presence or processing.
    • Findings contribute to a better understanding of the phytochemical composition of soy supplements.