The problem with flavonoids is that they are poorly absorbed (polyphenols) and quite easily destroyed (like by stomach acid or enzymes). I don't think blood levels of e.g. quercertin are achievable at a level like what people use for treating lab rats.
Another problem is lack of selectivity, many flavones are MAO inhibitors too.
Agreed. But, I thought I'd post the study above because it just came out, and definitely adds to the theoretical library of combatting tolerance with more tried and true NMDA antagonists like memantine & dxm in humans.
