Table S2 shows the results of correlation analysis among TAC, TPC, and each antioxidant activity assay. Significant positive correlation between TPC and antioxidant activity was revealed by the DPPH (r = 0.853) and FRAP (r = 0.990) assays. This result indicated
that the strong antioxidant activity was rendered by high TPC as previously reported (Erkan, Ayranci, & Ayranci, 2008). Significantly positive correlation between TAC and antioxidant activity was also observed in some berries, such as in bog bilberry (V. uliginosum) and blueberry (Vaccinium corymbosum and Vaccinium myrtillus). However, our study found that the positive correlation between TAC and antioxidant activity was not significant. This result is understandable, however, given that anthocyanin is only among the important polyphenols that contribute to antioxidant activity. Other components serving as antioxidants, such as phenolic acids or proanthocyanidins, possibly remain unknown, but do exist in these investigated berries. Thus, our future study will focus on the separation and identification of other phenolic compounds, as well as on the relationship between their amount and antioxidant activity, providing a global knowledge on the nutritional value and potential uses of berries.