*2.6. Total Flavonoid Content (TFC)*

The total flavonoid content (TFC) was determined using the AlCl3 method, with the absorbance of the samples being measured at 420 nm. The results of the TFC were expressed as quercetin equivalents (QE) in milligrams per gram dry weight (dw) of plant material (mg QE/g dw plant material) [31].
