The extraction kinetics of water soluble extracts (WSE) using the subcritical water extraction are shown in Fig. 1b. Looking at the kinetic curves we can presume that hydrolysis of the sunflower seed material occurs at temperatures higher than 100 C, since yield of WSE keep increasing over longer periods of time. The highest WSE extraction rate is obtained at 160 C, where the maximal yield of 30.0 ± 0.8% is reached after 60 min of extraction. Comparing the two lower temperature curves (60 C and 100 C), it can be observed that higher yields of WSE are achieved at 60 C. This is probably due to higher solubility of WSE at lower temperature.