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Table 1 Composition of experimental diets, %, as is, fed to 10–20 days old broilers

From: Dietary supplementation with free methionine or methionine dipeptide mitigates intestinal oxidative stress induced by Eimeria spp. challenge in broiler chickens

Ingredient, kg NSa dl-Met dl-MMet
Corn (7.8%) 54.89 54.89 54.89
Soybean meal (46%) 37.30 37.30 37.30
Soybean oil 3.80 3.80 3.80
L-Lysine HCl (78%) 0.16 0.16 0.16
L-Threonine (98.5%) 0.04 0.04 0.04
dl-Methionyl-dl-Methionine (95%, dipeptide) 0.29
dl-Methionine (99%) 0.28
Dicalcium phosphate (20%) 1.53 1.53 1.53
Limestone (38%) 1.16 1.16 1.16
Salt 0.45 0.45 0.45
Vitamin–mineral premixb 0.40 0.40 0.40
Inert filler 0.30 0.02 0.01
Total 100.00 100.00 100.00
  1. aNS Non-supplemented diet (control diet), dl-Met diet supplemented with dl-methionine 99%, dl-MMet diet supplemented with dl-methionyl-dl-methionine 95%
  2. bThe diets supplied the following compounds (per kg): retinyl acetate, 3.44 mg; cholecalciferol, 50 μg; dl-α-tocopherol, 15 mg; thiamine, 1.63 mg; riboflavin, 4.9 mg; pyridoxine, 3.26 mg; cyanocobalamin, 12 μg; d-pantothenic acid, 9.8 mg; d-biotin, 0.1 mg; menadione, 2.4 mg; folic acid, 0.82 mg; niacinamide, 35 mg; selenium, 0.2 mg; iron, 35 mg; copper, 8 mg; manganese, 60 mg; zinc, 50 mg; iodine, 1 mg; and butylated hydroxy toluene, 80 mg