JPH099881A - Production of beta-carotene-reinforced egg - Google Patents

Abstract

PURPOSE: To obtain a β-carotene-reinforced egg expected in a good health effect by a simple method comprising giving an egg-laying chicken feed containing a β-carothene source selected from β-carothene for food additives, carrots, and carrot juice-squeezed residues to egg-laying chickens. CONSTITUTION: A method for producing β-carothene-reinforced eggs comprises giving an egg-laying chicken feed containing a β-carothene source selected from β-carothene (usually a powdery material having a β-carothene content of 1-10wt.%) for food additives, carrots, and carrot juice extraction residues to egg-laying chickens. The β-carothene for food additives is preferably added in an amount of 0.005-1wt.% (converted into pure β-carothene) based on the feed. The addition amount of the carrots or carrot juice-squeezed residues is preferably 5-20wt.% by dry weight. The employment of the carrot juice-squeezed residues as the β-carothene-supplying source enables the effective utilization of industrial wastes.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for producing β-carotene-enriched eggs. More specifically, the present invention relates to a method of producing chicken eggs with an increased content of β-carotene, which is attracting attention for its health effects such as cancer prevention.

[0002]

2. Description of the Related Art Egg yolk of chicken eggs contains 0.02% of pigments, most of which are carotenoid fat-soluble pigments.
Egg yolk carotenoids include xanthophylls having a hydroxyl group in the molecule and carotene having no hydroxyl group. The ratio of both is about 10: 1, and the xanthophyll occupies the majority ("Egg-its chemistry and processing technology"). ] Yusuke Asano, Ryozo Ishihara, ed., Korin (1985)). It has been considered that β-carotene is present only in trace amounts in egg yolks, and that carotenoids in the diets that are usually fed to chickens are hardly transferred to egg yolks.

Japanese Patent Laid-Open No. 6-1553813 discloses that beta-carotene can be accumulated in egg yolk by containing Dawnariella algae in an amount of 0.3% by weight or more, and that spirulina algae can be contained in the feed at the same time. It is disclosed that the rate of transfer of beta-carotene to chicken eggs is improved and that eggs containing beta-carotene at a higher concentration can be produced.

[0004]

[Problems to be Solved by the Invention] β-carotene is not only converted into vitamin A in the body and showing various physiological activities, but also taken in as it is, exerting antioxidant properties, and effective for cancer prevention. It has been revealed that In order to maintain health, it is desired to ingest as much β-carotene as possible from various foods. Eggs are nutritionally balanced nutritional foods, and it has been reported that blood cholesterol does not rise even if one egg is taken daily. The present inventors have strengthened β-carotene, which is usually contained only in traces, so that even from eggs that are often eaten every day,
As a result of repeated studies so that β-carotene can be taken, the present invention has been completed.

[0005]

According to the present invention, the above objects and advantages of the present invention are as follows. At least one selected from the group consisting of β-carotene for food additives, carrot and carrot juice extract residue in the laying chicken. The method for producing β-carotene-enriched eggs is characterized in that an egg-laying chicken feed containing the β-carotene source is fed.

[0006] Carotenoids are said to be difficult to transfer to egg yolk from ordinary diets. However, the inventor
It was found that when β-carotene for food additives, carrot or ginseng juice extract residue is used as the β-carotene source, it can be added to the feed to increase the β-carotene content in egg yolk.

That is, as a source of β-carotene, commercially available β-carotene for food additives (β-carotene content 1 to 1
0% by weight, powder form), or a dry powder of carrot containing a large amount of carotene, or a dry powder of a residue obtained by extracting juice from carrot. Especially in the latter case, there is an advantage that the industrial waste is effectively used.

The addition amount of β-carotene for food additives is pure β
It is suitable that the amount of carotene is 0.005 to 1% by weight based on the feed. Further, the addition amount of ginseng and ginseng juice extraction residue is preferably 5 to 20% by weight on a dry weight basis. As a result, the amount of β-carotene in egg yolk can be increased to 10 times or more that of the control. As the amount of carotene added increases, the amount of carotene in egg yolk also increases, but it is necessary to consider so as not to disturb the nutritional balance of the feed.

The present invention will be described more specifically with reference to the following examples.

Example 1 Enrichment of egg yolk β-carotene by β-carotene for food additives Experiments were carried out using 214-day-old Shaver breeding hens, each group consisting of 6 chickens. Β-carotene 10 manufactured by Nippon Roche Co., Ltd. in a commercially available mixed feed for adult chicken breeding (manufactured by Shimizu Port Feed Co., Ltd.)
% Cold water soluble powder, β-carotene concentration in the feed is 0.2
% And 1%. This chicken feed 4
They were fed weekly and eggs were collected every week. Six groups of egg yolks in one group were mixed to prepare a sample, and carotene was analyzed. The results, as shown in Table 1, show that the addition of β-carotene resulted in β in egg yolk.
Carotene also increased over time, and after administration for 4 weeks, it was about 1.1.
Increased to mg / 100g and 1.2 mg / 100g.

[0010]

[Table 1]

Example 2 Using ginseng juice extraction residue,
Enrichment of egg yolk β-carotene Using 315-day-old Shaver breeding hens, experiments were conducted with 6 birds per group. Ginseng juice extraction residue was dried under reduced pressure at 40 ° C or lower to a water content of 5.3%, and was used as a commercial feed for adult chicken breeding (manufactured by Shimizu Port Feed Co., Ltd.) for 10
% And 20%. Chickens were fed the 20% spiked sample for 1 week followed by the 10% spiked sample for an additional 3 weeks. Eggs were collected every week, and yolks for 6 birds per group were mixed to prepare a sample, and carotene was analyzed. As shown in Table 2, the addition of the ginseng juice extraction residue increased β-carotene in egg yolk more than 20 times that of the control.

[0012]

[Table 2]

[0013]

EFFECTS OF THE INVENTION According to the method for producing β-carotene-enriched eggs of the present invention, β-carotene for food additives, which is easily available, and ginseng juice extraction residue, which is an industrial waste, are added to a commercially available adult chicken feed. With such a simple method, it is possible to produce β-carotene-enriched eggs that are expected to have health effects.

Claims (3)

[Claims] 1. A laying hen feed containing at least one β-carotene source selected from the group consisting of β-carotene for food additives, carrot and ginseng juice extraction residue, to the laying hen. Method for producing carotene-enriched eggs. 2. The method according to claim 1, wherein the source of β-carotene is β-carotene for food additives, and a feed containing β-carotene in a proportion of 0.05 to 1% by weight is provided. 3. The method according to claim 1, wherein the β-carotene source is ginseng or ginseng juice extraction residue and a feed containing 5-20% by dry weight is provided.