Search ETDs:
Quantification of Soy Isoflavones in Commercial Eggs and Their Transfer from Poultry Feed into Eggs and Tissues
Vargas Galdos, Dante Miguel Marcial

2009, Master of Science, Ohio State University, Food Science and Nutrition.
Isoflavones are potent phytoestrogens found in soybeans. Soybean meal constitutes a main ingredient of poultry feed and isoflavones may transfer into eggs and tissues. Our objective was to determine the transfer and accumulation of isoflavones from the feed into hen eggs and tissues, making them isoflavone sources in the human diet. Isoflavone content of commercial eggs with different claims were analyzed by HPLC-MS after hydrolysis. All commercial samples contained soy isoflavones and the metabolite equol. Then, 48 laying hens were fed soy-free, regular (25% soybean meal) or isoflavonerich diet. Isoflavones were found in experimental eggs and tissues. Enhancement of the diet with 500 mg isoflavones/100g feed resulted on egg yolks containing 1000μg isoflavones/100g while livers, kidneys, hearts and muscles contained 7162 μg/100g, 3355 μg/100g , 272 μg/100g and 97 μg/100g , respectively. The results showed that diet can be altered to modulate isoflavone content in hen eggs and tissues.
M. Monica Giusti (Advisor)
David Min (Committee Member)
John Litchfield (Committee Member)

Recommended Citations

Hide/Show APA Citation

Vargas Galdos, D. (2009). Quantification of Soy Isoflavones in Commercial Eggs and Their Transfer from Poultry Feed into Eggs and Tissues. (Electronic Thesis or Dissertation). Retrieved from https://etd.ohiolink.edu/

Hide/Show MLA Citation

Vargas Galdos, Dante. "Quantification of Soy Isoflavones in Commercial Eggs and Their Transfer from Poultry Feed into Eggs and Tissues." Electronic Thesis or Dissertation. Ohio State University, 2009. OhioLINK Electronic Theses and Dissertations Center. 22 Jan 2017.

Hide/Show Chicago Citation

Vargas Galdos, Dante "Quantification of Soy Isoflavones in Commercial Eggs and Their Transfer from Poultry Feed into Eggs and Tissues." Electronic Thesis or Dissertation. Ohio State University, 2009. https://etd.ohiolink.edu/

Files

osu1236706764.pdf (227.39 KB) View|Download