JPS61285947A - Production of iodine-enriched food - Google Patents

Abstract

PURPOSE:To obtain an iodine-enriched food useful for modified milk for infants, etc. without using additives other than foods, by feeding an iodine-containing material, e.g. KI, to a dairy cow, milking a milk with a high iodine content, pretreating the milk, drying the pretreated milk and using the resultant powdered milk as a raw material. CONSTITUTION:An iodine-containing material consisting of potassium iodide, calcium iodate, potassium iodate, seaweed and a mixture thereof, etc., is added and mixed with feed for dairy cow and the resultant feed is given thereto. Milking is then carried out to give a milk containing at least 300mug, based on one l milk, iodine, which is then pretreated, e.g. defatted, and dried by the spray-drying method, etc., to afford a powdered milk. The powdered milk is used as a raw material to produce a modified milk for infants, etc., and give the aimed iodine-enriched food.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the production of fortified foods, and more specifically to producing milk with the highest iodine content and using the dry powder of milk H as a raw material for formula milk for infants, etc. This invention relates to a method for producing iodine-enriched foods characterized by using ().

(Technical background) Medical scientists and nutritionists alike agree that breast milk is extremely suitable as food for newborn infants.
Protein is an attempt to convert milk into breast milk.

This is done on all aspects such as fats, sugars, minerals, vitamins, and amino acids.

Traditionally, minerals include calcium and phosphorus.

Regarding sodium, potassium, magnesium, iron, etc.
Efforts have been made to bring its content closer to that of breast milk, but
Regarding trace components such as copper, zinc and iodine, FAO/W
Despite the HO recommended standards and the ESPGAN recommended standards, it was not permitted as a food additive in Japan. However, recently, some of the Ministry of Health and Welfare ordinances and standards for food additives, etc. regarding copper and zinc have been revised.
Additives such as 1iA copper acid for copper and zinc sulfate for zinc were allowed at 1F. However, regarding iodine, as shown in Table 1, the iodine content in commercial infant formula using desalted raw materials is higher than that of breast milk or FAO/W.
It is not approved as a food additive even though it shows a lower value than the HO recommended standard.

Margin below Although no specific deficiencies have been reported for iodine, it is closely related to thyroid hormone, which is essential for human growth. Therefore, commercially available formula milk has a significantly lower h1 content compared to breast milk, so it is at least FAO/14
At least 5I per 100 Kcal according to the HO recommended standard! ! i
In other words, per 100g of commercially available infant formula powder, 25.7
It is considered desirable that 5 uy or more of iodine is contained. Therefore, there is a need for a method for fortifying foods, such as infant formula, for which iodine enrichment is desired, without losing the original flavor of the food, and without directly adding phosphorus.

(Prior Art and Problems to be Solved by the Invention) As a method for enriching foods with iodine in general, as shown in Table 2, kelp or kelp extract, which is high in iodine and safe as food, is recommended. Most appropriate.

Table 2: Iodine content in commercially available kelp and kelp extract However, kelp powder is insoluble in water and will not be uniformly dispersed in liquid foods such as infant formula, so it cannot be added as is. In addition, the kelp extract obtained by extracting water-soluble components from kelp contains the unique flavor of kelp and a large amount of salt, just like kelp powder, so although it can be used for some purposes, it is not suitable for adding to infant formula, etc.

Seafood is known as a food with a relatively high iodine content other than kelp powder or extract, but ingredients other than iodine affect the food itself in terms of nutritional composition and flavor, so only iodine fortification is required. It is not suitable for this purpose.

In light of this current situation, the present inventors have fortified only iodine in foods that are sensitive to changes in nutritional composition and flavor and contain milk compositions, such as infant formula, and have developed other compositions and flavors of foods to be fortified. As a result of researching methods from all angles that do not affect the
Feed a seed or two or more to dairy cows for 300u! Milk with an iodine content of i/1 or more is obtained, the milk is pretreated, and then dried and powdered, which is used as a raw material for powdered W4 milk for infants or powdered dairy products for adults. The present inventors have discovered that it is possible to produce products or iodine-enriched foods that have excellent flavor and solubility and have an iodine content close to that of breast milk, and have completed the present invention.

To produce milk containing more than 300 ug/L of iodine, a report by BIOIi [Onderstepoort Journal of Veterinary Science and Animal Industry (Onderstepoort Journal of Veterinary Science and Animal Industry)
Vctrinary 5science and Ani
mal Industry) Volume 2, Page 139,
Dairy cows are continuously fed 100 i of potassium iodide daily according to [1934]. Normally the iodine content in milk is 20
~γ0~/Z, but it has been reported that it can be easily increased to 510-1,070 ug/l.

It is also known that similar effects can be obtained by feeding iodate to dairy cows, as disclosed in Japanese Patent Application Laid-Open No. 55-37113.

Miller et al. [Journal of Daily Science (
Journal of Dairy 5science)
51, p. 1831, 1968], sodium iodide or calcium iodate was administered to Holstein or Gangi cattle, and the excretion of iodine into urine or feces was tracked using isotopes. It has been reported that both salts and iodates exhibit similar behavior. It is assumed that the iodine content of

In order to confirm these effects, the inventors
500q was fed with feed, and the iodine content in the milk was determined by a conventional method. The results were as shown in Table 3.

Margin below The iodine content in milk increases rapidly the day after feeding iodine-containing substances, and decreases when feeding is discontinued. The iodine content in milk on the day before feeding is 292R/1, which is a little high, but according to Packard, it is considered to be within the fluctuation range [Human Milk and Infant]
Formula (Hunanmilk and 1nfa
nt formula) 60 pages, Academic Press, 1983].

The present inventors have planned to manufacture a product that uses such milk, which has a significantly higher iodine content than usual, as a raw material for infant formula, either as it is or in a liquid state after processing such as defatting. ■It is easy to putrefy, ■It is inconvenient to transport, ■It is difficult to control the iodine content, and ■It is difficult to control the quality (bacterial problems, etc.). It has been found that when used as a raw material as is, it is extremely difficult to produce foods with an iodine concentration within a certain range.

(Means for Solving the Problems) Therefore, the present inventors have prepared whole milk powder or skim milk powder by mixing milk as it is with milk having a low iodine content or by pre-processing such as defatting, drying it, and powdering it. It has been found that by using the present invention as a raw material for infant formula or iodine-enriched powdered food, it is possible to easily produce a food whose iodine content is adjusted to a constant concentration. That is, as shown in Table 4, the present inventors have confirmed that iodine in milk remains in the powder without being destroyed even after spray drying or freeze drying by conventional methods.

Margin below The powder with high iodine content obtained in this way has the following features: ■ Good shelf life, ■ Easy transportation, ■ Iodine content can be controlled at a constant level, and ■ Time required for sterilization or searching for harmful substances. It has been found that it is extremely advantageous over manufacturing using milk directly as a raw material, as there is sufficient quantity and quality control is easy.

In order to use this powder as a raw material for powdered infant formula, etc., other raw materials (whey protein, casein, lactose, skim milk powder) can be used as a powder.

It can be mixed in powder form with raw materials used in the production of regular foods such as oil powder, soybean powder, vitamins, minerals, and dextrin, or it can be dispersed and dissolved in water together with other raw materials and homogenized to create an emulsion. The emulsion is concentrated by a conventional method and spray-dried to produce infant formula powder.

Formulated milk contains approximately 20ug/100 iodine derived from raw materials.
100 of the FAO/WHO Recommended Standards.
At least 54 per liter (at least 25 per 100 d of commercially available infant formula)
．． 75. i) or 11 per 1100 d of breast milk
~198i (If the solid content of breast milk is about 12%, it will be about 91.7 to 1,650 ug per 100 g of breast milk solid content)
In order to get close to 100 (30# per J) for formula milk,
Approximately 50R/1009 by adding dry powder equivalent to the increase
It is desirable to continue.

For example, whole milk powder obtained by spray-drying milk from a dairy cow fed calcium iodate, a feed additive, at a dose of 500 μg per day for 3 consecutive days, contains about 30,004 kg/day of calcium iodate.
Since it contains 100g of iodine, in order to use this as a raw material to produce formula milk powder of 100c;i, add 99g of commercially available formula powder to 1g of high iodine powder
By adding and mixing uniformly, it is possible to easily produce powdered milk that complies with the FAO/WIIO recommended standards.

In addition to infant formula powder made from such milk ingredients, it can also be used as a raw material for iodine enrichment in the production of foods made from soybeans as a main ingredient. In other words, as shown in Table 5, soybean products cause thyroid enlargement in rats when the iodine intake is low, but thyroid enlargement can be prevented if the iodine content is 3075 or more per 100 g (Block).
ock ) et al. [Archives
Archives of Biochemistry and Biophysics
y and Biophysics), vol. 93, p. 15, 1961.

In order to make one powdered food with a high content of soybean protein, we use 989% isolated soybean protein and plain milk powder (3,000%).
0iR/1009) If you mix 2g'lr, i
o.

A powdered food with a good flavor (protein content of 80X or more) containing 60 ug or more of iodine per 7 ml can be easily produced.

Further, the powdered milk containing a high concentration of iodine of the present invention may be used as a powder as described above, or it may be dissolved and used as a raw material for liquid foods.

Example 1 Commercially available mixed feed for dairy cows (trademark: Morinaga No. 1) 9,995
5 g of calcium iodate, which is a feed additive, was added to and mixed with 9 to obtain iodine-added blended feed 10 and 9.

This compounded feed was fed to three Holstein dairy cows (body weight 5so
Ky, 565 Ng and sheep, 580 kg) were fed once per day for 3 consecutive days. In addition, commercially available dairy cow formula feed (trademark: Morinaga No. 1), corn, barley, beer lees, straw, etc. were fed to each cow at a daily dose of 19 K9.

The joint holes of each of the 23 dairy cows were milked on the 31st day after the start of feeding the iodine-added compound feed and on the morning and evening of the following day.
050ug/1, 3,210IR/1 and U3
．． It had a blue gold content of 250i/Z. Each bid 1
54kg mixed with 8kg (Yoseikin ffi 3A70
111/1) at 75°C for 10 minutes, concentrated with a batch type concentrator until the solidity reached approximately 40%, and then heated with a spray dryer (manufactured by Anhydro) with hot air at a temperature of approximately 1.
Spray-dried at 80℃, exhaust air temperature about 80℃, iodine content 3
．． 000R/100gU) Approximately 4.0Kg of non-fat milk powder was obtained.

This whole milk powder (I kg) was converted into commercially available powdered milk (iodine content: 2
0 selections/100 g) 991 (mixed uniformly with g, filled into metal cans in 1 kg portions, replaced with nitrogen gas and sealed, 97 pieces of iodine-enriched infant formula <1) were produced.

The iodine content of this iodine-enriched infant formula is approximately 50u! I/
100g tear, exceeds FAO/WHO recommended standard,
Moreover, the flavor and shelf life were comparable to those of conventional powdered milk.

Example 2 In Example 1, the three dairy cows from Example 1, in which the iodine content in the expressed milk had returned to normal values after approximately one month had passed since the feeding of the iodine-added compound feed had been stopped, were tested again. The yields obtained by feeding/stopping iodine-added feed and milking under the same conditions as in Example 1 were 2.650i/1 and 2.80i/1, respectively.
0u! ! /1 and 2,950 g/f. Each bid is 18! 541(g(
The fat was separated from Etsu Togane ffi 2,800 #/Z) using a centrifuge, and then it was powdered under the same concentration and spray conditions as in Example 1 to obtain 3 kg of skim milk powder with an iodine content of 3,700 i/100 g. .

After uniformly mixing 21 (g) of this skim milk powder with 98 kg of commercially available isolated soybean protein powder (protein content: 92% per dry matter) and an appropriate package of natural sweetener and natural flavor, each 1 kg was filled into metal cans and replaced with nitrogen gas. The container was sealed and 95 pieces of iodine-enriched high protein powder (11 (g)) were produced.

The iodine content of this iodine-enriched Vibrofin powder is approximately 7
475/100g, and was comparable to conventional products in terms of flavor and storage stability.

Example 3 Commercially available mixed feed for dairy cows (trademark: Morinaga No. 1) 9,895
4.5g of calcium iodate, which is a feed additive, per kg.

0.5 g of potassium iodide and ioog of kelp powder were added and mixed to obtain 10 kg of iodine-added compound feed. This compounded feed was administered in Example 2 to three Holstein dairy cows whose iodine content in their milk had returned to normal values after approximately one month had passed since the feeding of the iodine-added compounded feed had been stopped. I paid for 3 days in a row. In addition, the above-mentioned commercially available compound feed for dairy cows (trademark: Morinaga No. 1), corn, barley, beer lees, straw, etc. are added at a daily rate of 19K per cow.
g was fed.

The mornings of the 8th and 9th day after the start of feeding the iodine-added compound feed, that is, the 5th and 6th days after the feeding stopped.

The total amount of mixed milk from each cow milked from three cows in the evening (iodine content: 5
101IS/1) 54Kg was heat sterilized at 75℃ for 15 minutes, concentrated to 40% solid content using a batch type concentrator, and then heated to a spray dryer (manufactured by Anhydro) with a hot air temperature of approximately 180℃ and an exhaust air temperature of approximately Spray dry at 80°C,
Yotogane m 650/100g of whole milk powder (4kg) was obtained.

Add 2 kg of malt powder, 7 kg of glucose, and 7 Ky of skim milk powder to 4 kg of iodine-containing whole milk powder obtained in this manner, mix uniformly, and fill each glass bottle with 2,009 g of powdered milk.
90 sealed, iodine-enriched malt milk powders (2oog
) was manufactured.

The iodine content of this iodine-fortified malt milk powder is t50
i/100g, and had excellent flavor and preservability.

Example 4 From each of the three dairy cows milked on the third day after the start of feeding the iodine-added compound feed and in the morning and evening of the following day in Example 1, milk was further milked on the 8th and 9th day after the start of the feeding, that is, 5 days after the feeding stopped. The tickets obtained by expressing milk in the morning and evening on the 6th day and 6th day are as follows:
495ts/1 each.

It had 515 katana/1 and 520 gg/1 yoseokinboku. Fat was separated from 18 kg (iodine content 510/1) mixed with 6 kg of each ticket using a centrifuge, and 12 kg of skim milk obtained was powdered under the same concentration and spray drying conditions as in Example 1. 650iJ9/1
00g of skim milk powder yielded 0.8 to 9.

This skimmed milk powder soog, raw milk 5K raw milk 5 viscosity and agar 30
g and 5 kg of an aqueous solution in which 10 g of gelatin was dissolved,
Disperse and dissolve in a homomixer at 85°C.

It was heat sterilized for 15 minutes. Next, it was cooled to 42°C, mixed with an appropriate amount of flavor and 300 cc of lactic acid bacteria starter (Lactobacillus bulgaricus as lactic acid bacteria).
Bacillus bulgaricus) and Streptococcus morphophilus (streptococcus)
ccusthermOphi 1us)) was added and mixed, and packed tightly in paper containers for each 100 g at 40°C.
Ferment for 5 hours, cool to about 5℃ and make yogurt (J
100 pieces (containing oog) were manufactured. This yogurt is
It was an iodine-enriched yogurt with good flavor and containing about 60 ug of iodine per 100 g.

(Effect of the invention) Since it is possible to produce iodine-enriched food using milk powder containing extremely high concentrations of iodine, it is possible to produce iodine-enriched food without affecting the original nutritional composition and flavor of the food, and without adding additives other than food. Its purpose was to achieve only iodine reinforcement without the use of iodine.

Claims (4)

[Claims] (1) Feeding dairy cows an iodine-containing substance selected from the group consisting of potassium iodide, calcium iodate, potassium iodate, seaweed, and mixtures thereof, and milking milk containing at least 300 μg of iodine per liter. A method for producing an iodine-enriched food, which comprises pre-treating the milk, drying it, and using the obtained powdered milk as a raw material. (2) The method for producing an iodine-fortified food according to claim 1, wherein the iodine-fortified food is a powdered dairy product. (3) The method for producing an iodine-fortified food according to claim 1, wherein the iodine-fortified food is infant formula powder. (4) The method for producing an iodine-enriched food according to any one of claims 1 to 3, wherein the milk is defatted in the pretreatment.