Different isoflavone content in soy-based diets are without influence on growth performance and carcass quality in pigs.
Performance and carcass quality
of pigs fed either soybean meal or soy protein concentrate were compared
in a feeding study. The diets were formulated to contain equal levels
of energy, protein and amino acids. The experimental variable was the
isoflavone content (daidzein plus genistein) of the protein sources
(soybean meal, 782 ug/g; soy protein concentrate 125 ug/g). Results
indicated absorption of isoflavones since circulating blood plasma levels
of genistein, daidzein and equol reflected dietary levels; however,
treatment had no affect on performance (gain, feed intake, feed/gain)
or carcass quality (percent of cuts or lean, meat quality).
Kuhn, Gerda and co-workers.
2004. Different isoflavone content in soy-based diets are without influence
on growth performance and carcass quality in pigs. Poster #T56, p177
of the 2004 Joint Annual Meeting abstracts.