Fig. 1From: Selenium source and level on performance, selenium retention and biochemical responses of young broiler chicksRelative bioavailability of SS and SY in the GSH-Px activity of 17 d old chicks. Inorganic (•••) and organic (−−) linear regressions. GSH-Px(SS) = 1756.8x – 8.6073; R2: 0.54. GSH-Px(SY) = 1415.2x – 17.477; R2: 0.58. SS relative bioavailability: 100%. SY relative bioavailability: 81%Back to article page