TRP was present in the highest concentration (1.61±0.08 µM) in control samples followed by GLU (1.06±0.06 µM), LYS (0.70±0.11 µM), and GLN (0.84±0.11 µM) while at the highest dose the concentration of FAAs decreased as GLU>GLN>LYS>TRP. Fig. shows TRP was highly susceptible to UV irradiation, with a significant reduction of 85%. This is due to the fact that TRP is a powerful UV light absorber that follows direct degradation under UV and generates OH radical . In contrast no significant (p>0.05) difference in GLN concentration was observed as compared to the control. These changes in the FAA profile varies with respect to the matrix used and the delivered dose. For instance, reported UV did not induce any changes in FAA content in coconut water, which may be due to the use of 254 nm exposure wave-length.