Figure 1.

Relation between the saturated fatty-acid digestibility calculated in the ileum, and the four dietary free-fatty-acid percentages¹ for two different fat sources (○ soybean oil -unsaturated diets, and • palm oil – saturated diets) in 37-day-old broilers. ¹Diets with an average of 5, 15, 35, and 50% of FFA. Each point represents each replicate value (with 3 chickens/replicate). The black line illustrates the quadratic model observed for the unsaturated diets: y = -3-5 × 2 – 0.006x, where R² = 0.39 and P = 0.007. The saturated diets did not fit any model. Abbreviations: FFA, free fatty acids; SFA, saturated fatty acids.