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. 2020 May 30;12(6):1610. doi: 10.3390/nu12061610

Figure 5.

Figure 5

Effects of daily 1-h operant self-administration of Chow, HSD, or HFD on (A) 23-h home-cage food intake (kcal), and (B) 24-h food intake (kcal) in female Sprague Dawley rats (n = 10/group). Rats were given the chance to self-administer one of the three diets in a fixed ratio 1 schedule during a 21-day period. Chow was otherwise freely available in the home cages. Panels represent M ± SEM. Symbols denote the following: * HSD differs from Chow, p < 0.05, ** p < 0.01, *** p < 0.001; # HFD differs from Chow, p < 0.05, ## p < 0.01, ### p < 0.001; $ HSD differs from HFD, p < 0.05, $$ p < 0.01, $$$ p < 0.001 (Newman–Keuls test).