Similarly, Awika
et al. (2003) observed high correlation between ABTS,
DPPH, and ORAC among sorghum and its products.
The aim of this research was to compare the efficiency of
ABTS, DPPH, FRAP, and ORAC assays to estimate
antioxidant activities and their correlations with ascorbic
acid, total phenolics, and total carotenoids contents in
guava fruit extracts.