Process-induced changes on bioactive compounds in whole grain rye

Kirsi-Helena Liukkonen (Corresponding Author), Kati Katina, Annika Wilhelmson, Olavi Myllymäki, Anna-Maija Lampi, Susanna Kariluoto, Vieno Piironen, Satu-Maarit Heinonen, Tarja Nurmi, Herman Adlercreutz, Anna Peltoketo, Juha-Matti Pihlava, Veli Hietaniemi, Kaisa Poutanen

Research output: Contribution to journalArticleScientificpeer-review

172 Citations (Scopus)

Abstract

Manufacturing of healthy whole-grain foods demands knowledge of process-induced changes in macro-, micro- and non-nutrients. The high content of dietary fibre is a challenge in relation to good product texture and sensory quality. The stability and bioavailability of bioactive compounds have a marked influence on the health effects of cereal foods. It was confirmed that sterols, folates, tocopherols and tocotrienols, alkylresorcinols, lignans, phenolic acids and total phenolics are concentrated in the bran layers of the rye grain, and are only present at low levels in the flour endosperm. The levels of folate and easily-extractable phenolic compounds increase in germination and sourdough baking, but there are negligible changes in the levels of sterols, lignans and alk(en)ylresorcinols. The levels of tocopherols and tocotrienols are reduced during the sourdough fermentation. In conclusion, many of the bioactive compounds in whole-grain rye are stable during food processing, and their levels can even be increased with suitable processing.
Original languageEnglish
Pages (from-to)117-122
Number of pages6
JournalThe Proceedings of the Nutrition Society
Volume62
Issue number1
DOIs
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed

Keywords

  • whole grains
  • rye
  • food processing
  • dietary fibres

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