The data also clearly show that during germination mung bean, soybean, and black bean sprouts behave differently in all these assays used. For instance, mung bean sprouts showed higher TRP and RDSC values and lower ARSC value than soybean and black bean, similar HOSC to black bean. Soybean exhibited the lowest HOSC value when compared to mung and black beans during germination. This could be because of antioxidant components being responsible differently for different radical scavenging activities. Interestingly, the antioxidant activity of seeds was generally found to increase at first and then to decrease during the germination period, the highest antioxidant activity occurred in 3–5 days of germination. Consequently, the optimum germination time for reaching high antioxidant activity in mung bean, soybean, and black bean is between 3 and 5 days.