Table 2.

Solubility of quercetin under different conditions in DPBS at 37 °C.

Condition	Solubility (µM)
pH 4	20.3 (4.9)
pH 7.15	33.9 (0.6)
pH 7.15 + 1 mM BS	36.0 (1.1)
pH6.1	21.6 (1.5)
pH 6.1 + 1 mM BS	28.2 (1.1)
Olive oil	1000 (100)

Values expressed as means of three determinations (standard deviation).