Data are averaged food intake over 24h (g) ±SEM in rats fed tannic acid (TA), sucrose octaacetate (SOA), or control diet. (A-D) Closed bars represent the 3-day average of intake of control animals during the pre-treatment phase, during which they consumed control diet, while open bars represent experimental animals who were exposed to either TA (A), IPR injections (B, C), or SOA (D). Closed circles represent quinine intake of control animals, while open circles represent quinine intake of pretreated animals. TA (A) and IPR pre-treated animals (B) ate more quinine than the ad lib controls.