Abstract
The main objective of the present study was to determine the effect of dietary β-cyclodextrin (β-CD) on egg laying performance and cholesterol content of egg yolk. Feed intake, egg production and egg weight varied slightly, but not significantly, between hens fed either a control diet or a diet containing one of an increasing series of β-CD concentrations (2%, 4% or 6%). However, feed intake, egg production and egg weight were all lower in the hens fed on 8% β-CD (p<0.05). No difference in haugh unit values, egg yolk color and egg shell thickness were found between the different treatments. The cholesterol content of egg yolks (mg/g yolk) was significantly decreased by 0.71, 2.98, 4.00 and 4.24 mg in eggs from hens maintained on 2%, 4%, 6% and 8% β-CD, respectively (p<0.05). These observations indicate that appropriate supplementation of diets with β-CD can reduce the cholesterol content of egg-yolks, thus raising the prospect of the production of a healthier functional food.
Highlights
IntroductionCurrent dietary advice is that the processed eggs (Newsweek, 1992)
There is a report that if the lowered by varying the composition of the feed of laying cholesterol content of egg-yolk is reduced greater than 30%
It can be seen that this period coincided with the lowering of yolk cholesterol content to its lowest levels by the different β-CDcontaining diets
Summary
Current dietary advice is that the processed eggs (Newsweek, 1992). It would be consumption of foods rich in cholesterol should be advantageous if various substances added to the feed of decreased (Palca, 1990). There is a report that if the lowered by varying the composition of the feed of laying cholesterol content of egg-yolk is reduced greater than 30%. In by changing the composition of the feed, egg production is this respect, technology has been developed to enable low- lowered (Hargis, 1988), while egg yolk colour and cholesterol eggs to be produced by absorbing the sterol palatability are maintained (Birrenkott et al, 2000). Using β-cylcodextrin, followed by centrifugal separation of there are reports that when an animal is fed βthe complex (Rao et al, 2000)
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