Unveiling the formation mechanism of Moringa oleifera leaf flavonoids aglycones during Monascus anka fermentation by using integrated widely targeted metabolomics and proteomics analysis.

This laboratory study investigated how fermentation with a fungus called Monascus anka affects the beneficial compounds in Moringa oleifera leaves. Researchers used advanced chemical analysis techniques to understand what happens during fermentation. They found that fermentation dramatically improved the leaves' potential health benefits. The total amount of flavonoids (plant compounds with antioxidant properties) increased by over 200%, while phenolic compounds increased by about 46%. The leaves' ability to neutralize harmful free radicals also improved significantly. The study identified 172 different phenolic compounds, with flavonoids making up about 71% of them. Two important compounds, quercetin and kaempferol, increased by 5 times or more during fermentation. The researchers discovered that the fungus produces specific enzymes that break down cell walls and modify flavonoid compounds, converting them from bound forms to free forms that may be more easily absorbed. This fermentation process essentially 'unlocks' beneficial compounds that were previously bound up in the plant material. While this research provides valuable insights into how fermentation can enhance plant compounds, it was conducted entirely in laboratory conditions without testing on humans or animals.