JPH0741425A - Gymnema sylvestre extract and its production - Google Patents

Abstract

PURPOSE:To obtain Gymnema sylverstre extract free from bitter taste and offensive odor without impairing the effectiveness of Gymnema sylvestre. CONSTITUTION:To 10 pts.wt. of the dried leaves of Gymnema sylvestre, 1-10 pts.wt. of activated carbon is added, and simultaneously with the addition of the activated carbon or after such addition, water or warm water is added, followed by agitation and extracting operation to obtain the objective Gymnema sylvestre extract. This extract is free from bitter taste and offensive odor, easy to take, and does not hamper flavor even if added to other foods.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for producing Gymnema sylvestre extract capable of obtaining a Gymnema sylvester extract containing no bitterness / smell, and a gymnema containing no bitterness / odor obtained by the method. It relates to a Sylvester extract.

[0002]

2. Description of the Related Art Gymnema sylvestre is a plant of the family Potato, which is native to India. Gymnematic acid contained in its leaves inhibits the absorption of sugar from the intestinal tract. It has been used for a long time as a therapeutic and prophylactic drug. It is also known that Gymnema acid has a sweetness-suppressing action, and for example, after containing Gymnema sylvestre leaves or its extract in the mouth,
When you eat sugar, you don't feel any sweetness, and you feel as if you were chewing on sand.

Various proposals have been made utilizing the properties of Gymnema sylvestre, for example,
There has been proposed a method (Japanese Patent Laid-Open No. 3-110727) for suppressing only the absorption of sugar from the intestinal tract without suppressing sweetness.

[0004] As described above, Gymnema sylvestre has been confirmed to have a therapeutic and preventive effect on diabetes. And since the active ingredient of Gymnema sylvestre (Gymnema acid) exists as a glycoside and is easily extracted with water or warm water, in recent years, dried leaves of Gymnema sylvestre have been extracted with hot water like green tea. Drinking is taking place. However, the extract of Gymnema sylvestre has a strong bitterness and has a peculiar smell of dried leaves, which makes it difficult to drink. Also, when using the above extract added to other foods,
There is a problem that the bitterness and smell of the extract hinder the flavor of food.

Therefore, a method has been proposed in which the bitterness is suppressed by adjusting the extraction temperature (20 to 50 ° C.) when the Gymnema sylvestre extract is extracted (JP-A-1-222757). There was a problem that the bitterness and smell could not be sufficiently removed.

[0006] Therefore, an object of the present invention is to provide a Gymnema sylvestre extract capable of obtaining a Gymnema sylvestre extract having no bitterness and odor without impairing the effectiveness of Gymnema sylvestre, and a method for producing the same. An object of the present invention is to provide a Gymnema sylvestre extract which has no bitterness / odor, is easy to drink, and does not impair the flavor even when added to other foods.

[0007]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that the above object can be achieved by adding a specific amount of activated carbon in the production process of Gymnema sylvestre extract. did.

The present invention has been made on the basis of the above findings. 1 to 10 parts by weight of activated carbon is added to 10 parts by weight of dried leaves of Gymnema sylvestre, and at the same time as or after the addition of the activated carbon, Add water or warm water and stir
The present invention provides a method for producing a Gymnema sylvester extract (hereinafter, referred to as the "first invention" when referring to this invention), which comprises performing an extraction operation to obtain a Gymnema sylvestre extract.

Also, dried leaves of Gymnema sylvestre 10
By adding water or warm water to parts by weight to obtain a Gymnema sylvester extract, and then adding 1 to 10 parts by weight of activated carbon to the gymnema sylvester extract and stirring to obtain a gymnema sylvester extract. The present invention provides a method for producing Gymnema sylvestre extract (hereinafter, referred to as "the second invention" means this invention).

Hereinafter, Gymnema, which is the first invention of the present invention,
The method for producing the Sylvestre extract will be described in more detail. As the activated carbon used in the first invention, activated carbon which is usually used for adsorption treatment and the like can be used without particular limitation. For example, granular activated carbon or powdered activated carbon is preferably used.

The amount of activated carbon added is 1 to 10 parts by weight, preferably 2 to 6 parts by weight, based on 10 parts by weight of dried leaves of Gymnema sylvestre. The amount of activated carbon added is
When it is less than 1 part by weight based on 10 parts by weight of dried leaves of Gymnema sylvestre, bitterness and odor remain in the extract and coloring is observed. On the other hand, if the amount exceeds 10 parts by weight, the bitterness and odor are completely removed and coloring is hardly observed, but the sweetness suppressing effect is significantly reduced.

To carry out the first invention, a specific amount of activated carbon is added to the dried leaves of Gymnema sylvestre, and water or warm water is added at the same time as or after the addition of the activated carbon, and the mixture is stirred.・ It can be implemented by performing extraction operation.

To add the above-mentioned water or warm water at the same time as or after the addition of the above-mentioned activated carbon, the activated carbon is added to the dried leaves,
A method of adding after mixing, etc., by mixing activated carbon and water or warm water in advance to prepare a mixture and adding the mixture to dried leaves, or by adding water or warm water while adding activated carbon You can

The above-mentioned water or warm water is not particularly limited, but tap water or the like can be used, and the temperature of the water or warm water at this time is preferably room temperature to 95 ° C. The amount of water or warm water used is preferably 0.2 to 2 liters per 10 g of the dried leaves.

In the first aspect of the invention, the stirring / extracting operation can be carried out by using a commonly used method without particular limitation. The extraction temperature in the stirring / extraction operation may be a normal extraction temperature (room temperature to 95 ° C), but preferably,
60-70 degreeC is good. The extraction time may be a normal extraction time (15 to 120 minutes), but preferably 30 to 6
0 minutes is good.

In the first invention, it is preferable that after the above stirring / extracting operation, further post-treatment be carried out. Examples of the post-treatment include filtration for removing activated carbon and leaf debris. The filtration can be performed by an ordinary filtration method using filter paper.

Next, Gymnema, which is the second invention of the present invention,
The method for producing the Sylvestre extract will be described in more detail. Incidentally, the points which are not described in detail are the same as those of the first invention.

To carry out the second invention, water or warm water is added to dried leaves of Gymnema sylvestre to obtain a Gymnema sylvester extract, and then a specific amount of activated carbon is added to the Gymnema sylvester extract. It can be performed by stirring to obtain a Gymnema sylvestre extract.

The Gymnema sylvestre extract can be obtained by adding water or warm water to the dried leaves and stirring, and the stirring can be carried out by a usual method.

To obtain the Gymnema sylvestre extract, the activated carbon is added to the Gymnema sylvestre extract, stirred, and if necessary, the same operation as the post-treatment in the first invention is performed. Can be obtained by

The Gymnema sylvestre extract of the present invention obtained by the above-mentioned first and second inventions has various properties of Gymnema sylvestre, that is, the effect of inhibiting the absorption of sugar, the effect of suppressing the sweetness and the like are sufficient. It is retained, and the bitterness and smell are removed.

[0022]

[Examples] The Gymnema sylvestre extract of the present invention is described in more detail below with reference to Examples, but the present invention is not limited thereto.

Example 1 (Example of the first invention) Five 10 g of dried leaves of crushed Gymnema sylvestre were prepared, and a predetermined amount [0 (comparative control product), 2.5,
5, 10, 20 (comparative control product) g] activated carbon was added,
1 liter of tap water heated to 70 ° C. was added thereto, and stirring / extraction operations were performed for 15 minutes while maintaining the same temperature. After completion of the stirring / extracting operation, the mixture was filtered using a filter paper (TOYO No. 5) to obtain 5 kinds of Gymnema sylvestre extracts. 5 ml of each of the obtained Gymnema sylvestre extract was given to the panelists (5 people), and the presence / absence of bitterness / odor and the presence / absence of coloring,
And the presence or absence of sweetness in 5 levels (+++, ++, +, ±,
-) Evaluation was performed and the average value was calculated. The results are shown in [Table 1] below.

The above-mentioned sweetness is evaluated by including the above-mentioned Gymnema sylvestre extract in the mouth and then sprinkling with sugar to determine whether or not the sweetness is felt. Also,
+++ to − for the above-mentioned bitterness, odor, and sweetness are as follows.・ +++; It feels very strong.・ ++: Feel strongly.・ ＋ ； Slightly felt.・ ± ： I can hardly feel it.・ － ； I can't feel it at all.

+++ to − regarding the above coloring are as follows.・ +++; Remarkably colored.・ ++: Clearly colored.・ +: Slightly colored.・ ± ； It is not clear whether there is coloring or not. -: No coloring.

As shown in the following [Table 1], 10 g of activated carbon,
With the addition of 20 g, the bitterness and odor were completely removed, and coloring was not observed. No sweetness was felt at all when 10 g was added. With the addition of 5 g, the bitterness was almost completely removed, and the odor was also almost removed. In addition, although slight coloring was observed, there was a sweetness suppressing effect (no sweetness was felt at all). When 2.5 g was added, no sweetness was felt, but bitterness and odor were slightly felt. In the non-addition group (addition of 0 g), there was a sweetness suppressing effect, but both bitterness and odor were strong and strong coloring was observed.

[0027]

[Table 1]

Example 2 (Example of the Second Invention) 10 g of dried leaves of crushed Gymnema sylvestre were added to 70 ° C.
1 liter of heated tap water was added to the mixture, and the mixture was stirred at the same temperature for 15 minutes for extraction operation to obtain a Gymnema sylvester extract. Next, 5 g of activated carbon was added to the extract, and the mixture was stirred for 2 minutes, and after completion of stirring, filter paper (TOYO N
o.5) to obtain Gymnema sylvestre extract. 5 ml of the obtained extract was used as a panel (A, B, C,
D, E) were given, and the presence or absence of bitterness / odor and the presence or absence of sweetness were evaluated in 5 grades (+++, ++, +, ±, −). The results are shown in [Table 2] below. The above +++ to − are the same as those in the first embodiment. As shown in the following [Table 2], the extract of Gymnema sylvestre extracted by this method had significantly reduced bitterness and odor, and was excellent in sweetness suppressing effect.

[0029]

[Table 2]

[0030]

EFFECTS OF THE INVENTION According to the method for producing Gymnema sylvestre extract of the present invention, it is possible to obtain the Gymnema sylvestre extract without bitterness and odor without impairing the effectiveness of Gymnema sylvestre. Also, the Gymnema of the present invention
The sylvestre extract has no bitterness and odor, is easy to drink, and does not impair the flavor even when added to other foods. Therefore, the method for producing Gymnema sylvestre extract of the present invention is very easy to operate and set conditions, does not require a special solvent or enzyme, and is economically excellent,
It is useful for practical application. The Gymnema sylvestre extract of the present invention is practically useful because it has almost no bitterness or odor when used as a beverage as it is or added to other foods, and retains the effectiveness of Gymnema sylvestre. It is something.

Claims (3)

[Claims] 1. 1 to 10 parts by weight of activated carbon is added to 10 parts by weight of dried leaves of Gymnema sylvestre, and
At the same time as or after the addition of the activated carbon, water or warm water is added, and a stirring / extraction operation is performed to obtain a Gymnema sylvester extract, which is a method for producing a Gymnema sylvester extract. 2. A Gymnema sylvester extract is obtained by adding water or warm water to 10 parts by weight of dried leaves of Gymnema sylvestre, and then the activated carbon 1 is added to the Gymnema sylvester extract.
A method for producing a Gymnema sylvestre extract, comprising adding 10 parts by weight and stirring the mixture to obtain a Gymnema sylvestre extract. 3. A Gymnema sylvestre extract obtained by the method according to claim 1.