Source 1: Berry Health Benefits Network,
Source 2:
Source 3: C. Lister et al., The nutritional composition and health benefits of New Zealand tamarillos, Crop & Food Research
Report No. 1281, 2005, page 17, table 14: Antioxidant activity (as measured by the ABTS assay) of some foods and supplements on a per 100g basis and per standard serving.