Plasma concentrations of liver enzymes of obese rats supplemented with red pitaya juice for 8 weeks. Data are presented as mean ± SEM, n = 5–8. Values marked with different letters are significantly different at the level of p < 0.05. ALP, alkaline phosphatase; ALT, alanine transaminase; AST, aspartate transaminase. C, corn starch diet; CRP, corn starch + red pitaya juice; H, high fat diet; HRP, high fat diet + red pitaya juice.