KR101835973B1 - A composition for preventing hair loss and promoting hair growth comprising medical herbs, and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a composition for preventing hair loss and promoting hair growth and a method for producing the same, and is characterized by comprising a first component comprising an extract of a first raw material mixed with burdock, sea bass, persimmon, Wherein the first ingredient and the second ingredient are contained in a ratio of 6: 4 to 5: 5, wherein the second ingredient comprises an extract of a second ingredient that is a mixture of mint, licorice, red ginseng, iris and grapefruit A composition for preventing hair loss and promoting hair growth using the herbal medicines and a method for producing the same.

Description

Technical Field [0001] The present invention relates to a composition for preventing hair loss and promoting hair growth using a medicinal herb and a method for producing the composition,

The present invention relates to a composition for preventing hair loss and promoting hair growth using a medicinal herb and a method for producing the same.

The human hair has about 100,000 to 150,000 hairs, and each hair has a different cycle and grows and falls through growth period, regenerator, and rest period. In normal people, this cycle usually repeats over 3 to 6 years, resulting in an average of 60 to 100 hairs dropped daily. On the other hand, in hair loss patients, the rate of hair growth in the growth phase decreases and the rate of hair growth in the retrograde period and the rest period increases during the growth and elimination cycle of hair, resulting in abnormal hair loss.

It is known that hair loss is caused by poor blood circulation, excessive male sex hormone function, excessive secretion of sebum secretion, hypofunction of scalp and other bacteria, genetic factors, aging, and stress. These factors work in combination to help the hair growth effect. Hair growth effect that makes the hair grow well. Slender effect of thick and strong hair that does not have thin and strong hair, excessive production of sebum, growth of dermatophytes, itching induction, scalp and hair Drying of the hair, poor flexibility of the hair, and cracking of the scalp and hair. In particular, itching and dandruff appear on the scalp not only worsen the symptoms of hair loss, but also induce inflammation, resulting in the blocking of the hair follicles.

In recent years, due to changes in diet and social environment, the number of people suffering from abnormal symptoms of scalp and hair is increasing, the age is lower, and the hair loss population of women is also increasing. Accordingly, research has been conducted on a composition capable of preventing abnormal symptoms of various scalp and hair including hair loss and improving the condition of scalp and hair.

Hair cosmetics such as hair restorer include vitamins such as vitamin E, amino acids such as serine or methionine, vasodilators such as acetylcholine derivatives, anti-inflammatory agents such as ritosperm root extract, female hormones such as estradiol, Functional promoters, melanin synthesis catalysts such as copper pantothenate, keratolytic agents such as salicylic acid, and the like. These ingredients are also used to help prevent and treat alopecia. However, when using various chemical synthetic materials as in the prior art, it is difficult to expect a natural controllable sedation and cleansing action of the scalp and hair as well as abnormal stimulation of the scalp and hair.

Thus, conventional scalp and hair-related products often have a chemical substance as a main component, which often causes side effects such as irritation of the scalp during long-term use, and is a major cause of environmental pollution. Therefore, there is a demand for a product which can prevent hair loss, and effectively remove wool, various scalp irritations, itching dandruff and the like to make healthy pores and improve wool and hair growth, without being harmful to the human body as much as possible.

Accordingly, it is an object of the present invention to provide a composition for preventing hair loss and promoting hair growth, which comprises a natural medicinal herb extract as a main component.

Another object of the present invention is to provide a method for producing the composition for preventing hair loss and promoting hair growth.

According to an aspect of the present invention,

A second ingredient comprising a mixture of a first ingredient comprising an extract of a first ingredient, which is a mixture of a burdock, a dandelion, a horseradish, a horseradish, a second ingredient, a mixture of a first ingredient and a second ingredient mixed with a ginseng root, Angelica gigas, Mint, And a second component comprising an extract,

Wherein the first raw material and the second raw material are contained in a ratio of 6: 4 to 5: 5, and a composition for promoting hair loss prevention and hair growth using the medicinal herb.

In the present invention, the first raw material is mixed at a ratio of 12: 12: 10: 8: 6: 6: 6 of burdock, sea water,

Wherein the second raw material is mixed at a ratio of 6: 6: 6: 5: 6: 5: 3: 3.

Preferably, the composition is a formulation selected from the group consisting of shampoo, rinse, hair pack, hair treatment, hair soap, hair toner, hair lotion, hair cream, hair spray, hair mousse and hair gel.

According to another aspect of the present invention,

A first step of preparing a first raw material by washing and shredding burdock, daphnia magna, rhizomes;

A second step of preparing a second raw material by washing and finishing the red ginseng root, Angelica gigas, Mint, Sissin, licorice, red ginseng, iris and grapefruit respectively;

A third step of adding the first raw material and water to a hot water bath at a weight ratio of 1: 4 to 6, and then heating the hot water at 90 to 100 ° C for 2 to 3 hours to extract the first ingredient; And

The second raw material and water are further added to the boiling water having been subjected to the third step at a weight ratio of 1: 3 to 5, and then the mixture is heated by hot water at 90 to 100 ° C for 3 to 4 hours to prepare a composition Comprising four steps,

Wherein the first raw material and the second raw material are contained in a ratio of 6: 4 to 5: 5.

Preferably, the first step is a step of preparing the first ingredient material by mixing the ingredients of Burdock, Sasao, Rhizobia, Nepheline, Safflower, Morus alba and Mashin at a ratio of 12: 12: 10: 8: 6: 6: 6,

In the second step, the second component material is prepared by mixing the components of the citrine, Angelica gigas, Mint, Sezin, Licorice, Red ginseng, Irish wine and Grapefruit in a ratio of 6: 6: 5: 6: 5: 3: 3 .

According to the present invention, there is provided a method for preparing a composition comprising an extract of burdock which is harmless to the human body, an extract of Yangjemun, Hassuo, Sukjihwang, manganese, It is possible to provide a composition which effectively alleviates inflammation, seborrheic dermatitis, dandruff and scalp itching which cause hair loss, thereby eliminating the cause of hair loss, thereby inhibiting hair loss and promoting hair growth have. In particular, when the composition of the present invention is used, burdock shows the effect of treating and preventing inflammation of the scalp and improves the scalp state by promoting circulation of blood by Hashuo, Hwasungcho, To prevent aging of hair caused by drowning and irrigation, and to prevent hair loss by using Sukjungwang, Sangbokpung, Angelica ginseng, Red ginseng, Irispicola, Licorice, and Yangjibeong.

Further, according to the present invention, it is possible to remove aroma unique to herbal medicines and improve the aroma of aroma oil by further blending the aroma oil which shows an effect on hair and scalp improvement, and the effect of showing aroma oil effect have.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a photograph showing a hot water heater used in the production of a composition according to an embodiment of the present invention.
FIG. 2 is a photograph showing the scalp state (male to 50 years old) before and after use of the composition according to one embodiment of the present invention.
FIG. 3 is a photograph showing the scalp state (40s female) before use of the composition according to one embodiment of the present invention and after 5 months use.
FIG. 4 is a photograph showing the scalp state (men in their 40s) before use of the composition according to one embodiment of the present invention and after 5 months of use.
FIG. 5 is a photograph showing the scalp state (female in 60s) before use of the composition according to one embodiment of the present invention and after 5 months of use.

Hereinafter, the present invention will be described in detail.

In the composition for preventing hair loss and promoting hair growth according to the present invention,

A second ingredient comprising a mixture of a first ingredient comprising an extract of a first ingredient, which is a mixture of a burdock, a dandelion, a horseradish, a horseradish, a second ingredient, a mixture of a first ingredient and a second ingredient mixed with a ginseng root, Angelica gigas, Mint, Wherein the first raw material and the second raw material are contained in a ratio of 6: 4 to 5: 5.

Of the first component, burdock (Arctium lappa) is particularly rich in saponin in its shell. It has the effect of eliminating the heat poison (heat poison), various inflammation which causes hair loss, seborrheic dermatitis. Dandruff, scalp itching, and the like, thereby alleviating the cause of hair loss. Therefore, in the present invention, it is preferable that the burdock, especially the burdock shell, is included.

In addition, the first component of the sewage (Pleuropterus multiflorus) is included for the purpose of seeing blood, strengthening tendons and bones, replenishing essences, and darkening hair. Such a sewage has a large amount of a substance that transfers oxygen essential for obtaining a bioenergy source, and thus it is included in the composition of the present invention to smooth the hair circulation of the scalp to make the hair roots firm, and the lecithin component It is contained in large quantity to prevent aging and to prevent hair loss which is the aging of hair.

In addition, among the above-mentioned first ingredients, Hwasungcho is a medicinal substance having the effect of lowering heat, detoxifying, diuretic and swelling, and is excellent in antibacterial and sterilizing action and blood circulation effect. Therefore, by being included in the composition of the present invention, it effectively acts on scalp trouble caused by fine dust, yellow dust, and other dirty substances, which are one of the causes of hair loss, thereby alleviating hair loss through elimination of waste products in the scalp and hair and promotion of blood circulation And to promote hair growth promoting function.

In addition, among the above-mentioned first ingredients, the two-legged vegetable is a vegetable having the nickname of "bald" vegetables, and it plays a role of improving alopecia due to dermatitis and scalp type.

Also, among the first ingredients, Sukjihwang (mature yellow) is included in the composition of the present invention to blacken the hair and effectively plays a role in depilation or thinning of the hair due to blood donation.

In addition, among the first ingredients, the mulberry leaf is excellent in the anti-inflammatory action, and when it is included in the composition of the present invention, it is effective to relax the scalp and alleviate the scalp. Especially, it contains a large amount of beta tocopherol, Thereby giving an effect and giving the hair a shine.

In addition, in the pharmacological experiments, the action of the intestinal action of the first ingredient, the hypertensive action, the hypertensive action, the antibiotic action, the contraction of the uterus, and the hemostatic action has been revealed in the pharmacological experiments. . Therefore, the composition of the present invention is excellent in soothing effect of scalp such as anti-inflammation, anti-inflammation, anti-allergy and so on as well as scalp cleansing effect, and gives convergence and moisturizing effect.

Preferably, in the first component, it is important that the first raw material be mixed at a ratio of 12: 12: 10: 8: 6: 6: 6 of burdock, dashi, Do. When mixed at the above ratios, it is possible to alleviate scalp inflammation caused by burdock, prevent alopecia due to sewage and fortify hair roots, scalp cleansing by horseradish peroxidase, alleviate scalp irritation caused by rootstock, prevent hair loss by scabies, And the effect of promoting hair growth can be optimized, and the effect of reducing the inflammation of the scalp caused by mashin and sewage can be optimized.

In addition, among the above-mentioned second ingredients, it can improve blood circulation, cleansing the scalp, supplying nutrients to the hair follicles, and helping the hair to become healthier.

In addition, it is well known that the second component of the present invention is a compound of the present invention, and it is included in the composition of the present invention to prevent dryness of the scalp by promoting the action of blood and blood flow, .

In addition, since the mint of the second component has a paracetamol action and an antiinflammatory action, the composition of the present invention can lower the heat of the scalp, alleviate inflammation and itching of the scalp, and provide a cooling sensation.

In addition, among the above-mentioned second ingredients, seshin has an anti-inflammatory action, and it is possible not only to calm and alleviate the scalp but also to give effects of hair growth or wool.

In addition, licorice of the second ingredient has an effect of relieving inflammation of the scalp through detoxification and soothing action, plays a role of helping regenerate healthy hair by regenerating cells, and can help harmonize with other medicinal materials It plays a role.

As well known, red ginseng among the above-mentioned second ingredients contains a large amount of ginsenoside (saponin) component, which strengthens hair roots and strengthens the hair to make it thick and strong, thereby preventing hair loss and improving wool.

In addition, the iris of the second ingredient not only imparts radiance to hair but also has effects of preventing hair loss and promoting hair growth by anti-inflammation, antibacterial and antioxidative action.

In addition, among the second components, grapefruit has an excellent antioxidative function, thereby imparting a role as a preservative and a natural preservative when included in the composition of the present invention, and also contributing to hair glow and health.

Preferably, in the second component, the second raw material is mixed at a ratio of 6: 6: 6: 5: 6: 5: 3: 3, which is selected from the group consisting of ciliate, angelica, mint, It is important to make sure. When mixed at the above ratios, the hair root enhancement effect by strengthening hair root by red ginseng, red ginseng, sesin, iris and the effect of scalp calming and scalp irritation mitigation by Angelica gigas, peppermint, sezin, licorice and red ginseng, The effect of the present invention can be exhibited in harmony.

In addition, the composition for preventing hair loss and hair growth of the present invention may take the form of a solution, an emulsion, a viscous mixture or the like, and may be manufactured into any formulation conventionally produced in the art. For example, shampoo, Hair packs, hair treatments, hair soaps, hair toners, hair lotions, hair creams, hair sprays, hair mousses and hair gels.

In addition, the composition for preventing hair loss and hair growth using the medicinal herb of the present invention is prepared by preparing the first raw material and the second raw material by washing and finishing the raw medicinal materials, respectively, and then preparing the composition by the method of heating the soup.

Specifically, the first step is to prepare the first raw material by washing and trimming burdock, duckweed, pike, sambucope, A second step of preparing a second raw material by washing and finishing the red ginseng root, Angelica gigas, Mint, Sissin, licorice, red ginseng, iris and grapefruit respectively; A third step of adding the first raw material and water to a hot water bath at a weight ratio of 1: 4 to 6, and then heating the hot water at 90 to 100 ° C for 2 to 3 hours to extract the first ingredient; And further adding the second raw material and water at a weight ratio of 1: 3 to 5 to the hot water tank through the third step, and heating the hot water at 90 to 100 ° C for 3 to 4 hours to extract the composition And a fourth step.

According to the method of the present invention, the first ingredient can be extracted by increasing the extraction efficiency while increasing the fragility of the raw material by extracting the first raw material and water by heating the mixture at a high temperature of 90 to 100 ° C . There is a problem that the extraction efficiency is lowered when the temperature is lower than the above-mentioned temperature range. If the temperature range is exceeded, there is a problem that nutrients and vitamins are lost.

Next, the second raw material and water prepared above are further added to the boiler in which the first ingredient is extracted, and the second ingredient is extracted by heating the mixture. Thus, when the second component is extracted after the extraction of the first component, reheating is performed on the first raw material, and the unextracted components are re-extracted to increase the extraction efficiency of the first component, The weakness can be optimized. At this time, similarly to the extraction of the first component, the extraction efficiency can be increased while increasing the fragility of the raw material by heating by heating at a high temperature of 90 to 100 ° C.

The thus-prepared composition for preventing hair loss and hair growth of the present invention can be molded into a desired formulation by controlling the proper specific gravity and viscosity to be maintained, and filled into a container to be made into a product. Particularly, since the composition has a specific gravity of 1.010 to 1.030 and a viscosity of 10,000 to 13,000, it can be molded into a shampoo formulation without special chemical additives.

In addition, the composition for preventing hair loss and hair growth of the present invention may be blended with other components which are usually blended with the hair growth promoting agent, if necessary. Examples of the compounding ingredient to be added include, but are not limited to, a preservative component, a moisturizer, an ultraviolet absorber, a plant extract, a purified water, a blood circulation accelerator and the like. Any of the above components may be blended within the range that does not impair the objects and effects of the present invention, but is preferably added in an amount of 0.01 to 5 parts by weight, more preferably 0.01 to 3 parts by weight, based on the total weight.

Therefore, preferably, the aroma oil may further be mixed into the composition for promoting hair loss prevention and hair growth, as described above. For example, the method may further include mixing and aging the aroma oil, and then mixing the aged aroma oil with the composition so as to adjust the viscosity and impart functionality with the aroma oil.

Specifically, the step of mixing and aging the aroma oil is a step of mixing (blending) and aging two or more aroma oils selected from the group consisting of lavender oil, rosemary oil, cedar wood oil, time oil, marjoram oil and eucalyptus oil. The mixing and aging process is preferably carried out in a separate vessel at a temperature of 15 to 30 ° C, more preferably 18 to 23 ° C. The aging time is 20 hours or more, preferably 20 to 40 hours, more preferably 24 hours. Such a temperature of 15 to 30 캜 maximizes the activity of the active ingredient by stabilizing the aroma oil through the mixing and aging process at such a temperature that the active ingredient activity of the blended aromatic oil is not inhibited and the stability can be maintained. It is possible to minimize aroma volatilization during the process.

The aroma oil used in the present invention is an essential oil extracted from natural plants and can be used as lavender oil, rosemary oil, cedarwood oil, time oil, marjoram oil and eucalyptus oil. In addition, Aroma oil which shows efficacy can be further included and used.

Further, in the step of aging the aroma oil, an additional oil component such as jojoba oil, argan oil, rose hip oil, sweet almond oil, olive oil, , Green tea seed oil, evening primrose oil, camellia oil, rice bran oil, green tea oil, apricot seed oil, avocado oil, cherry seed oil, grape seed oil, peanut oil, sunflower seed oil, hemp seed oil and wit spot oil And preferably, jojoba oil, argan oil or rose hip oil can be used.

In the present invention, the Lavender oil helps stress and sleep, and also helps the scalp and scalp of the scalp. It also has an effect on stimulating cell growth and balancing sebum secretion. The Rosemary oil is effective in preventing dandruff and preventing hair loss, and has anti-inflammatory and astringent properties. The Cedarwood oil is effective for dermatitis, dry sickness, and alopecia areata. The Thyme oil has a preservative effect and a disinfecting action, and is effective for preventing dandruff or hair loss. The Marjoram oil calms the mind and resolves anxiety problems and insomnia. It also improves blood circulation. The Eucalyptus oil helps oxygen transport, increases skin respiration, cleanses the head, and has an excellent effect on inflammation. The Jojaba oil delivers effective substances of aroma oil ingredients to the skin, activates and nourishes the scalp. The Argan oil provides the skin with moisture and nutrients to regenerate the skin, and is effective for damaged skin, atopy, dry skin, eczema and the like. The Rosehip oil contains a large amount of linoleic acid and linolenic acid, which are essential fatty acids, so that it has excellent effect of regenerating skin cells and enhancing the cell membrane, and restraining moisture retention and skin aging.

The aroma oil of the present invention may be commercially available or may be extracted from each plant by refining by methods known in the art.

The aroma oil of the present invention may use at least two selected from lavender oil, rosemary oil, cedar wood oil, time oil, marjoram oil and eucalyptus oil, and preferably all of the aroma oils. Also, jojoba oil, argan oil, rose hip oil or the like may be added to the aroma oil component.

The aroma oil of the present invention may preferably be lavender oil, rosemary oil, cedar wood oil, time oil, marjoram oil, eucalyptus oil and jojoba oil. In this case, each of the above components may be used in an amount of 20 to 35:20 to 35:15 to 25:16 to 24: 1 to 5: 1 to 20:35 to 20:35, such as lavender oil, rosemary oil, cedar wood oil, time oil, marjoram oil, eucalyptus oil, More preferably 25 to 30:25 to 30:17 to 20:18 to 21: 1 to 3: 1 to 3: 5 to 8, based on the total weight of the composition. The aroma oils can be blended with a perfume that is refreshing and refreshing when mixed at the above-mentioned weight ratio, and the active activity of the aroma oil can be obtained without skin irritation. Particularly, it is possible to prevent hair loss, promote hair growth, prevent dandruff, Is improved at the same time.

In addition, the aroma oil is mixed with the aroma oil at 18 to 23 ° C. At this time, aroma oil may be mixed in an amount of 0.01 to 10 parts by weight, preferably 0.5 to 5 parts by weight, based on 100 parts by weight of the composition. If the content of the aromatic oil is less than 0.01 part by weight, it is difficult to expect the active activity of the aromatic oil. If the content is more than 10 parts by weight, skin irritation may be caused.

The mixing process is preferably carried out at a temperature of 18 to 23 ° C, whereby mixing with the shampoo composition is possible without lowering the stability of the aroma oil.

In order to maintain the oil stability, the filling of the container after the mixing process is preferably carried out at 18 to 23 ° C, which is the same temperature as the mixing process.

Hereinafter, the present invention will be described in detail with reference to examples, but the scope of the present invention is not limited thereto.

Example 1 Preparation of Shampoo Composition

First, burdock and burdock shell, huushuo, hwaseongsu, yangjemun, saengjiwanghwang, bokbipi, and dried mackerel were separately prepared, washed thoroughly, and then cut into 5 to 10 cm size to prepare a first raw material.

Next, the dried materials of red ginseng root, Angelica gigas, mint, sesin, licorice and iris, red ginseng and grapefruit were respectively prepared, cleaned and then cut into 5 to 10 cm size to prepare a second raw material.

1 kg of the above-mentioned first raw material and 5 kg of water were introduced into a large-capacity hot water heater (standard 800 * 800 * 1700 (mm), 380 V power supply 3 phase, 12KW 4P, air pressure 2Kg, Lt; 0 > C for about 2 hours to extract the first component.

Next, the hot water was reopened and 1 kg of the prepared second raw material and 3 kg of water were added thereto, and the mixture was heated at 95 ° C for about 3 hours to extract the first component and the second component.

The product obtained in a hot water bath was filtered and cooled at room temperature to prepare a shampoo composition and filled in a container.

< Experimental Example  1> Sensory Evaluation of Shampoo Composition

In order to confirm hair loss prevention effect and hair growth promoting effect of the shampoo composition prepared in the above examples, five men in their 40s, 40s, 50s and 60s were selected. The shampoo composition was used for 5 months, and hair was wound once a day by a conventional method. The degree of moisturizing scalp, the degree of reduction of dandruff, and the degree of preventing hair loss were evaluated by a five-point scale method. The average value of each group is shown in Table 1 below.

age Moisturizing scalp Dandruff reduction Hair loss prevention Promoting hair growth A man in his 40s 4.8 4.9 4.9 4.9 Women in their forties 4.8 4.7 4.7 4.7 A man in his 50s 4.6 4.8 4.8 4.8 Women in their 60s 4.3 4.8 4.6 4.7

The degree of moisturization of the scalp, the degree of reduction of dandruff, the prevention of hair loss, and the promotion of hair growth were evaluated as excellent scores. Especially, it was evaluated that there was an excellent effect in reducing dandruff, preventing hair loss and promoting hair growth.

Figs. 2 to 5 are photographs showing the scalp state of one of the fifts, 40s, 40s, and 60s women. In all four groups, the effect of preventing hair loss and promoting hair growth was remarkable .

From the results of the above examples, it can be concluded that the composition of the present invention contains the extract of burdock root which is harmless to human body and the extract of Yangyang, Root, By using the grapefruit extract as the second ingredient, it is formulated optimally, thereby effectively relieving various inflammation, seborrheic dermatitis, dandruff and scalp itching which cause hair loss, thereby suppressing hair loss and promoting hair growth It can be seen that the

Claims (5)

A first step of preparing a first raw material by washing and shredding burdock, daphnia magna, rhizomes;
A second step of preparing a second raw material by washing and finishing the red ginseng root, Angelica gigas, Mint, Sissin, licorice, red ginseng, iris and grapefruit respectively;
A third step of adding the first raw material and water to a hot water bath at a weight ratio of 1: 4 to 6, and then heating the hot water at 90 to 100 ° C for 2 to 3 hours to extract the first ingredient;
The second raw material and water are further added to the boiling water having been subjected to the third step at a weight ratio of 1: 3 to 5, and then the mixture is heated by hot water at 90 to 100 ° C for 3 to 4 hours to prepare a composition Step 4; And
And a fifth step of aging the mixed aroma oil at 18 to 23 DEG C for 20 to 40 hours and further mixing the aged aroma oil with the composition prepared in the fourth step,
Wherein the first raw material and the second raw material are contained in a ratio of 6: 4 to 5: 5,
Wherein the first step is a step of preparing a first ingredient material by mixing at a ratio of 12: 12: 10: 8: 6: 6: 6 of burdock, dashi,
The second step is to prepare a second component material by mixing the components of the composition in a ratio of 6: 6: 6: 5: 6: 5: 3: 3 to the celestial gong, angelica mushroom, mint, sesquin, licorice, red ginseng, iris,
The mixed aroma oil is selected from the group consisting of lavender oil, rosemary oil, cedarwood oil, time oil, marjoram oil, eucalyptus oil and jojoba oil in the range of 25-30: 25-30: 17-20: 18-21: 1-3: : An oil mixed at a weight ratio of 5 to 8,
Wherein the mixed aroma oil is mixed in 0.5 to 5 parts by weight with respect to 100 parts by weight of the composition prepared in the fourth step.
A method for preventing hair loss and promoting hair growth using a medicinal herb. The method according to claim 1,
Wherein the composition is selected from the group consisting of shampoos, rinse, hair pack, hair treatment, hair soap, hair toner, hair lotion, hair cream, hair spray, hair mousse and hair gel. And a method for producing a composition for promoting hair growth.
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