<p>One hundred and sixty day-old male broiler chickens were used in a completely randomized design to study the effect of different levels of a tannin nano-absorber (TN) on growth performance, blood parameters, carcass and meat quality, tibia bone ash and nutrient digestibility. The experiment consisted of four dietary treatments comprising; T₁: a positive control diet consisting of 60% corn, T₂: 30% corn plus 30% sorghum grain plus 0.25% tannin nano-absorber, T₃: 30% corn plus 30% sorghum grain plus 0.063% tannin nano-absorber, and T₄:30% corn plus 30% sorghum grain (negative control). Each treatment had four replicates of 10 broiler chickens. The experiment lasted for 42 days and water and feed were offered <i>ad libitum</i>. The results showed that addition of tannin nano-absorber to the diet increased body weight gain, decreased feed intake and improved feed conversion ratio (<i>P</i> &lt; 0.05). Supplementation of the diet with tannin nano-absorber also increased the concentration of blood constituents including glucose, albumin, protein, hemoglobin and red blood cells (<i>P</i> &lt; 0.05). Tannin nano-absorber had no effect on carcass quality, however it increased drip loss of the meat (<i>P</i> ≤ 0.01). Crude lipid and protein digestibility were increased (<i>P</i> ≤ 0.05), but inclusion of TN had no effect on tibia bone ash and gizzard and ileum digesta pH. It was concluded that supplementation of a corn/sorghum diet with TN at the level of 0.063% could improve growth performance, increase blood metabolites, and enhance nutrient digestibility in broiler chickens.</p>