3.4. Antioxidant capacity
The antioxidant capacity of camu-camu powders was measured by three methods: Folin–Ciocalteu reducing capacity (Fig. 1A), FRAP ferric reducing power (Fig. 1B) and DPPH scavenging activity (Fig. 1C). Gonçalves et al. (2010) compared the antioxidant activity of several Brazilian tropical fruits and camu-camu showed the highest activity, which was around 10 times higher than that for tucumã and uxi. Antioxidant activity is directly proportional to total phenolic and