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Pearson’s correlation coefficients (r) between antioxidant capacity (FRAP, DPPH, ORAC, ABTS, NO scavenging assays) and TPC, TFC, CTC, β-carotene, and lutein content. TPC: total polyphenol content, TFC: total flavonoid content, CTC: condensed tannin content. ABTS*: including the values for amaranth leaf extracts.
