Quercetin is among the most studied flavanoid i.e. poilabilitylyphenol due to its perceived highly anti-inflammatory nature. However, its low bioavailability is a constraint for its medical use. Isoquercetin, its sister molecule is found to be better absorbed & converted to quercetin, so advocated for medication by some authors. Some other argue dihydro-quercetin is more clinically effective and advisable in therapy. How common are isoquercetin & dihydro quercetin, they better than quercetin wrt effect, bioavailability?