Research note: vitamin E status of turkey poults as influenced by different dietary vitamin E sources, a bile salt, and an antioxidant.
An experiment was conducted to determine the effects of level and chemical form of dietary vitamin E on alpha-tocopherol status of poults. The effects of a dietary bile salt and an antioxidant on concentrations of alpha-tocopherol in serum and liver were also tested. Six dietary treatments were obtained by supplementing a corn-soybean meal diet with 12 IU of DL-alpha-tocopheryl acetate (TA)/kg (LE), 12 IU of TA plus 800 mg of sodium taurocholate/kg (LB), 12 IU of TA plus 500 mg of ethoxyquin/kg (LS), 12 IU of D-alpha-tocopheryl polyethylene glycol 1,000 succinate (TPGS)/kg (LT), 100 IU of TA/kg (HE), and 100 IU of TPGS/kg (HT). Growth rate and feed efficiency of poults were unaffected (P > .05) by dietary treatments. The HE diet increased alpha-tocopherol in liver (P < .01) at 14 and 21 days of age. Liver and serum alpha-tocopherol concentrations were unaffected by dietary TPGS (LT and HT diets) at any age. Serum alpha-tocopherol concentration was unaffected by dietary treatments at 5 days of age. The HE diet, however, increased (P < .01) serum alpha-tocopherol at 9, 14, and 21 days of age. Age-related changes in alpha-tocopherol concentration were observed. Both liver and serum alpha-tocopherol decreased markedly from 1 to 14 days of age. The HE diet only partly alleviated the reduction of alpha-tocopherol in liver and serum. The water-soluble form of vitamin E, TPGS, dietary sodium taurocholate, or dietary ethoxyquin, did not prevent the marked decline in alpha-tocopherol concentration of liver and serum during the 21-day experiment.
Soto-Salanova
M F
MF
Department of Animal Science, Iowa State University, Ames 50011.
Sell
J L
JL
Mallarino
E G
EG
Piquer
F J
FJ
Barker
D L
DL
Palo
P E
PE
Ewan
R C
RC
D000818:Animals; D000975:Antioxidants / Q000008:administration & dosage; D001647:Bile Acids and Salts / Q000008:administration & dosage; D004032:Diet; D008099:Liver / Q000378:metabolism; D008297:Male; D009752:Nutritional Status; D011092:Polyethylene Glycols; D024505:Tocopherols; D014422:Turkeys / Q000378:metabolism*; D014810:Vitamin E / Q000008:administration & dosage / Q000031:analogs & derivatives / Q000097:blood / Q000378:metabolism*; D024502:alpha-Tocopherol / Q000031:analogs & derivatives*
D000975:Antioxidants; D001647:Bile Acids and Salts; D014810:Vitamin E; D011092:Polyethylene Glycols; D024502:alpha-Tocopherol; C014225:tocophersolan; D024505:Tocopherols