The HO RSA of black garlic at various heating
times was shown in Fig. 5. The fresh garlic showed low HO
scavenging activity of 3.1%, and then the scavenging ability
of black garlic increased continually to 30.8% as heating
time increased from 0 to 10 days. This result suggested that
the HO RSA of the black garlic extracts was 10 times higher
than that of the fresh garlic extracts. In addition, the black
garlic showed a significantly high scavenging activity of
DPPH radicals (95%) as compared with that of HO radicals
(30.8%), indicating that the black garlic can be a good scavenger
of DPPH radicals.