Histopathology of liver and heart of obese rats supplemented with red pitaya juice for 8 weeks. (A-D) Haematoxylin and eosin staining of liver section showing hepatocytes with enlarged fat vacuoles (marked as “fv”) (× 20), sinusoids dilatation (marked as “sd”) and inflammatory cells infiltration around the sinusoids (marked as “in”) (× 20). (E-H) Hematoxylin and eosin staining of left ventricle showing inflammatory cell infiltration (× 20) (marked as “in”) as dark spots outside the myocytes. (I-L) Picrosirius red staining of left ventricle showing interstitial collagen deposition (× 20) (marked as “cd”) and hypertrophied cardiomyocytes (marked as “hy”). A, E, I, corn starch diet; B,F,J, corn starch + red pitaya juice; C, G, K, high fat diet; D, H, L, high fat diet + red pitaya juice.