|Table 1: Potential beneficial and adverse effect of flavonoid supplements. (Egert. 2011)|
Scientists from the Department of Nutrition and Food Science of the University in Bonn, Germany (Egert. 2011), have now taken a closer look at possible side-effects of a selection of these phytoprotectants. Among the possible interaction and health concerns the scientists have found were
- Flavonoid - trace element interactions - reduced the uptake of iron (and possible other trace elements)
- Flavonoid - vitamin interactions - folate, vitamin E and vitamin C absorption may be inhibited
- Flavonoid - thyroid interactions - increased risk of goiter and higher incidence of various forms of thyroid related illnesses
All this does not mean, that you should generally shy away from these nutrients. It shall only remind you of the fact that isolated in-vitro studies on certain beneficial effects of certain plant / fruit / legume extracts may not be enough to decide whether its worth risking unwanted side effects of inadequately researched "wonder supplements". Maybe, trying to get a diversified menu of flavonoids from a healthy and varied diet (yes, I am thinking of those of you who live on chicken breasts and broccoli), would be a viable alternative!?