Oral deodorization composition

Abstract

The purpose of the present invention is to provide an oral deodorization composition having further improved deodorizing effects. The oral deodorization composition contains a terpene-containing essential oil at 20 to 80 mass% and carbon powder at 3 to 25 mass%.

Description

Oral deodorant composition

[0001] The present invention relates to an oral deodorant composition.

[0002] There are various odors all around us, and there has long been a strong demand for ways to eliminate unpleasant odors. The high level of interest in odor elimination can be seen from the large number of odor-eliminating products on the market, including supplements and oral care products with deodorizing properties, soaps and detergents with enhanced deodorizing properties, clothing and bedding with deodorizing properties, and household deodorizers.

[0003] Unpleasant odors are generated by various causes, such as eating, smoking, and physical constitution. In particular, bad breath, body odor, etc. tend to become stronger when strong-smelling foods and alcohol are consumed, and such unpleasant odors may persist for several tens of hours. In recent years, eliminating such unpleasant odors has become important not only for the purpose of eliminating personal discomfort but also from the perspective of etiquette. Therefore, there is a growing need for deodorizing products regardless of age or gender.

[0004] For example, deodorizing compositions containing astringent skin, catechin, zedoary, etc. (Patent Document 1), and garlic odor-eliminating foods containing cloves and olive oil (Patent Document 2) have been reported.

[0005] However, even today, when such a wide variety of deodorizing products are available, there is still a demand for further improvements in deodorizing effects.

[0006] JP 2012-41321 A JP 1-128772 A

[0007] An object of the present invention is to provide an oral deodorant composition having a further improved deodorizing effect.

[0008] The present inventors have conducted extensive research to solve the above problems and have found that an oral deodorizing composition containing 20% ​​to 80% by mass of essential oils containing terpenes and 3% to 25% by mass of charcoal powder can improve the deodorizing effect against unpleasant odors. The present invention was completed based on this finding and further research.

[0009] That is, the present invention provides the following inventions. Item 1. An oral deodorant composition containing 20% ​​by mass to 80% by mass of a terpene-containing essential oil and 3% by mass to 25% by mass of charcoal powder. Item 2. The oral deodorant composition according to Item 1, containing 1.5 parts by mass to 10 parts by mass of the essential oil per part by mass of charcoal powder. Item 3. The oral deodorant composition according to Item 1 or 2, containing 1.5 parts by mass to 4 parts by mass of the essential oil per part by mass of charcoal powder. Item 4. Use of a terpene-containing essential oil and charcoal powder for the production of an oral deodorant composition, wherein the content of the essential oil in the composition is 20% by mass to 80% by mass, and the content of the charcoal powder is 3% by mass to 25% by mass. Item 5. Use of an oral deodorant composition for suppressing unpleasant odors, wherein the composition contains 20% by mass to 80% by mass of a terpene-containing essential oil and 3% by mass to 25% by mass of charcoal powder. Item 6. A method for suppressing unpleasant odors, comprising orally administering an effective amount of an oral deodorant composition to a subject in need of unpleasant odor suppression. Item 7. The use according to Item 4 or 5 or the method according to Item 6, wherein the essential oil is present in an amount of 1.5 parts by mass to 10 parts by mass per part by mass of charcoal powder. Item 8. The use according to Item 4 or 5 or the method according to Item 6, wherein the essential oil is present in an amount of 1.5 parts by mass to 4 parts by mass per part by mass of charcoal powder. Item 9. The oral deodorant composition, use, or method according to any one of Items 1 to 8, wherein the composition further contains sunflower oil. Item 10. Item 10. The oral deodorant composition, use, or method according to any one of Items 1 to 9, wherein the content (total amount) of the terpene-containing essential oil, charcoal powder, and vegetable oil in the composition is 25% by mass or more and 90% by mass or less, preferably 30% by mass or more and 70% by mass or less.

[0010] The oral deodorant composition of the present invention can effectively deodorize unpleasant odors. In particular, the oral deodorant composition of the present invention can effectively deodorize bad breath caused by eating and drinking food or alcohol, smoking, or one's constitution. Furthermore, the oral deodorant composition of the present invention can exhibit excellent deodorizing effects even on bad breath caused by eating and drinking food with a strong smell, such as garlic, scallions, green onions, and onions, and can particularly effectively deodorize garlic odor, for which prevention of lingering odor is strongly desired.

[0011] Hereinafter, embodiments of the present invention will be described in more detail. In this disclosure, the term "comprise" also encompasses the meaning of "consist essentially of" or "consist of."

[0012] The oral deodorant composition of the present invention is characterized by containing a terpene-containing essential oil and charcoal powder. In particular, the oral deodorant composition of the present invention is characterized by containing 20% ​​by mass or more and 80% by mass or less of the terpene-containing essential oil and 3% by mass or more and 25% by mass or less of the charcoal powder.

[0013] The oral deodorant composition of the present invention contains an essential oil containing a terpene. Terpenes are also called terpenoids or isoprenoids, and the terpenes incorporated into the oral deodorant composition of the present disclosure are not limited as long as they are edible. Specific examples of terpenes include monoterpenes such as carvone, menthol, menthone, camphor, limonene, cineole, myrcene, dihydrocarvone, borneol, geraniol, linalool, citral, citronellal, thymol, anethole, pinene, linalyl acetate, menthyl acetate, and perillaldehyde. Preferred examples of terpenes include carvone, menthol, menthone, camphor, limonene, and cineole. When optical isomers of terpenes exist, they include all of the d-, l-, and dl-isomers. The essential oil containing a terpene may contain one type of terpene or a combination of two or more types.

[0014] Examples of essential oils containing terpenes include, but are not limited to, mint oils (essential oils of plants in the Mint genus) such as peppermint oil, spearmint oil, mentha oil (mentha white oil), menthone oil, and mentha terpene oil, parsley seed oil, eucalyptus oil, sage oil, lemon oil, cassia oil, mastic oil, mandarin oil, lime oil, laurel oil, chamomile oil, caraway oil, bay oil, lemongrass oil, pine needle oil, neroli oil, anise oil, tea tree oil, clove oil, cassia oil, coriander oil, cardamom oil, ginger oil, rosemary oil, thyme oil, juniper berry oil, grapefruit oil, orange oil, lavender oil, jasmine oil, rose oil, wintergreen oil, and fennel oil.

[0015] As long as the essential oil contains terpenes, it is not particularly limited, but preferred examples include essential oils from mint plants and eucalyptus oil. As mint plants, peppermint (Mentha piperita L.), spearmint (Mentha spicata L.), Japanese mint (Mentha arvensis L.), etc. are preferably used. Specific examples include menthone oil, peppermint oil, spearmint oil, peppermint oil, and peppermint terpene oil, and more preferably menthone oil, spearmint oil, peppermint oil, peppermint terpene oil, etc. Terpene-containing essential oils may be used alone or in combination of two or more. For example, essential oils from mint plants and eucalyptus oil may be used in combination. For example, menthone oil: peppermint oil: spearmint oil: peppermint terpene oil may be combined in a ratio (mass ratio) of 10:2 to 8:5 to 15:0.3 to 1, and such a combination is expected to provide a more excellent deodorizing effect. The method for collecting essential oils is not particularly limited, and examples include steam distillation, solvent extraction, and supercritical fluid extraction, with steam distillation being preferred.

[0016] Terpene-containing essential oils are commercially available, and examples thereof include, but are not limited to, menthone oil under the trade name Menthone Oil 95% (manufactured by Nagaoka Jitsugyo Co., Ltd.), peppermint oil under the trade name Menthone White Oil (manufactured by Nagaoka Jitsugyo Co., Ltd.), spearmint oil under the trade name Spearmint Oil ZX-3491 (manufactured by Takasago International Corporation, spearmint oil 90-100%, CAS 8008-79-5), spearmint oil under the trade name Spearmint Oil (manufactured by Koei Kogyo Co., Ltd.), and peppermint oil under the trade name Falcorex Peppermint B (manufactured by Ichimaru Falcos Co., Ltd.).

[0017] The oral deodorant composition of the present invention contains 20% by mass or more and 80% by mass or less of essential oils including terpenes, preferably 20% by mass or more and 70% by mass or less, more preferably 20% by mass or more and 60% by mass or less, particularly preferably 20% by mass or more and 50% by mass or less, and particularly preferably 25% by mass or more and 50% by mass or less.

[0018] The oral deodorant composition of the present invention contains charcoal powder. The charcoal powder used in the present invention is not particularly limited as long as it is black charcoal, but examples thereof include wood charcoal, activated charcoal, bamboo charcoal, and bone charcoal, with activated charcoal being preferred. The charcoal powder may be used alone or in combination of two or more.

[0019] The average particle size of the charcoal powder is not particularly limited, but is, for example, 0.1 to 500 μm. From the viewpoint of the unpleasant odor suppression effect, it is preferably 0.1 to 50 μm, more preferably 1 to 40 μm, and even more preferably 10 to 30 μm. The average particle size of the charcoal powder is also not particularly limited, but is, for example, 0.1 to 500 μm. From the viewpoint of the unpleasant odor suppression effect, it is preferably 0.1 to 50 μm, more preferably 0.3 to 10 μm, and even more preferably 0.5 to 1 μm. In the present invention, the average particle size (μm) refers to the 50% particle size (D50) in the volume-based cumulative particle size distribution, and the average particle size (μm) is measured by a laser diffraction / scattering method using a laser diffraction / scattering particle size distribution analyzer.

[0020] The oral deodorant composition of the present invention contains charcoal powder in an amount of 3% by mass to 25% by mass, preferably 8% by mass to 25% by mass, more preferably 8% by mass to 20% by mass, and even more preferably 10% by mass to 20% by mass. The oral deodorant composition of the present invention contains charcoal powder in an amount of 3% by mass to 25% by mass, preferably 3% by mass to 20% by mass, more preferably 4% by mass to 15% by mass, and even more preferably 4% by mass to 10% by mass.

[0021] In the oral deodorant composition of the present invention, the content ratio of the terpene-containing essential oil to the charcoal powder may be set appropriately depending on the type of terpene-containing essential oil and charcoal powder used, the formulation form, etc., but in order to further improve the deodorizing effect, it is preferable to contain 1.5 to 10 parts by mass of the terpene-containing essential oil per 1 part by mass of charcoal powder, more preferably 1.5 to 8.5 parts by mass, even more preferably 1.5 to 7 parts by mass, particularly preferably 1.5 to 4 parts by mass, and especially more preferably 2 to 4 parts by mass.

[0022] The oral deodorant composition of the present invention is not limited in this respect, but the total content of the terpene-containing essential oil and charcoal powder in the composition is preferably 23% by mass or more and 90% by mass or less, more preferably 25% by mass or more and 70% by mass or less, even more preferably 25% by mass or more and 60% by mass or less, and particularly preferably 30% by mass or more and 50% by mass or less.

[0023] The oral deodorant composition of the present invention may further contain a vegetable oil other than the terpene-containing essential oil (hereinafter simply referred to as "vegetable oil"). Examples of vegetable oils include sunflower oil, parsley seed oil, jojoba seed oil, olive oil, coconut oil, palm oil, palm kernel oil, safflower oil, castor oil, avocado oil, sesame oil, tea oil, evening primrose oil, wheat germ oil, macadamia nut oil, hazelnut oil, kukui nut oil, rosehip oil, meadowfoam oil, persic oil, tea tree oil, corn oil, rapeseed oil, wheat germ oil, linseed oil, cottonseed oil, soybean oil, peanut oil, rice bran oil, and jojoba oil. The vegetable oil may be used alone or in combination of two or more. The oral deodorant composition of the present invention preferably contains sunflower oil. By including sunflower oil, particularly excellent deodorizing effects can be achieved. The content of sunflower oil is not particularly limited, and may be, for example, 2% by mass to 77% by mass, preferably 10% by mass to 76% by mass, more preferably 20% by mass to 75% by mass, even more preferably 20% by mass to 70% by mass, and particularly preferably 30% by mass to 70% by mass. Vegetable oils other than sunflower oil are also not limited, but when sunflower oil and / or vegetable oils other than sunflower oil are contained, the vegetable oil content (total content) may be, for example, 2% by mass to 77% by mass, preferably 10% by mass to 77% by mass, more preferably 20% by mass to 76% by mass, even more preferably 20% by mass to 75% by mass, and particularly preferably 30% by mass to 75% by mass. In the present invention, "terpene-containing essential oils" are distinguished from "vegetable oils," i.e., the vegetable oil content does not include terpene-containing essential oils.

[0024] The oral deodorant composition of the present invention is not limited to this extent, but the total content of the terpene-containing essential oil, charcoal powder and sunflower oil in the composition is preferably 25% by mass or more and 90% by mass or less, more preferably 30% by mass or more and 70% by mass or less, even more preferably 30% by mass or more and 60% by mass or less, particularly preferably 30% by mass or more and 50% by mass or less, and particularly preferably 30% by mass or more and 40% by mass or less.Furthermore, the oral deodorant composition of the present invention is not limited to this extent, but the total content of the terpene-containing essential oil, charcoal powder and vegetable oil in the composition is preferably 25% by mass or more and 90% by mass or less, more preferably 30% by mass or more and 70% by mass or less, even more preferably 30% by mass or more and 60% by mass or less, particularly preferably 30% by mass or more and 50% by mass or less, and particularly preferably 30% by mass or more and 40% by mass or less.

[0025] The oral deodorant composition of the present invention may contain other optional components as needed. Examples of optional components include edible or pharmaceutically acceptable additives and carriers, which are widely known in the art. Examples of edible or pharmaceutically acceptable additives and carriers include thickeners, sweeteners, excipients, binders, disintegrants, disintegration inhibitors, absorption promoters, humectants, adsorbents, lubricants, surfactants, fillers, preservatives, stabilizers, solubilizers, pH adjusters, acidulants, emulsifiers, flavorings, and colorants. These are well known to those skilled in the art and can be appropriately selected and used. That is, the optional components may be used alone or in combination of two or more. Furthermore, those skilled in the art can appropriately select and design the components to be blended and their ratios, and they may be appropriately adjusted to suit the desired form, preferences, etc., within a range that does not interfere with the effects of the present invention. Furthermore, the oral deodorant composition of the present invention contains a terpene-containing essential oil as an essential component, and the terpene itself may be further added (externally added) as an optional component together with the terpene-containing essential oil. However, as exemplified in the test examples described below, since the desired effect can be obtained by using a terpene-containing essential oil, the terpene itself may or may not be added (externally added) within the range in which the effect of the present disclosure can be obtained. Therefore, in the oral deodorant composition of the present invention, the terpene contained in the composition may be derived only from the terpene-containing essential oil, or may contain terpenes derived from other than the terpene-containing essential oil, and preferably is derived only from the terpene-containing essential oil. Whether the terpene itself has been added can be known, for example, from the product package description (instructions) or the like.

[0026] The form of the oral deodorant composition of the present invention is not particularly limited, and examples thereof include liquid forms such as solutions, suspensions, emulsions, syrups, etc., semi-solid forms such as jellies and creams, and solid forms such as powders, fine granules, granules, tablets, pills, troches, sheets, capsules, etc. When the oral deodorant composition of the present invention is in the form of a liquid preparation, it can be stored frozen, or may be stored after removing water by freeze-drying or the like. Freeze-dried preparations, dry syrups, etc. are added with sterilized water or the like at the time of use and redissolved for use.

[0027] The oral deodorant composition of the present invention can also be filled into microcapsules, soft capsules, hard capsules, seamless capsules, etc. to form capsules. Furthermore, for example, when the oral deodorant composition of the present invention is in a solid form, a coating can be applied as needed. The oral deodorant composition of the present invention can also be made into sugar-coated tablets, gelatin-coated tablets, enteric-coated tablets, film-coated tablets, double tablets, or multi-layer tablets, in which a coating is applied around the composition. Examples of capsules include capsules containing gelatin, glycerin, and water. These forms can be produced according to methods known in the art.

[0028] The amount of intake of the oral deodorant composition of the present invention is usually adjusted appropriately depending on the intensity of the unpleasant odor. For example, the amount of intake per adult is 10 mg or more, preferably 20 to 100 mg, and particularly preferably 20 to 60 mg, of essential oil containing terpenes. Furthermore, the oral deodorant composition of the present invention may be taken once or several times a day. In particular, the oral deodorant composition of the present invention may be taken when the subject is concerned about their own unpleasant odor. For example, the oral deodorant composition of the present invention is preferably taken in conjunction with the consumption of strong-smelling food or drink or alcohol, or smoking. The intake may be before or after eating or smoking, or during eating or smoking, and more preferably immediately before or after eating or smoking so as not to interfere with eating or smoking.

[0029] The subject of the present invention is not limited as long as it is an animal for which deodorization of an unpleasant odor is required. For example, the animal may be a human, but it may also be a mammal other than a human. The age and sex of the subject of the present invention are not limited.

[0030] The oral deodorant composition of the present invention can effectively deodorize unpleasant odors. In particular, the oral deodorant composition of the present invention can effectively deodorize bad breath caused by eating and drinking food or alcohol, smoking, or one's constitution. Furthermore, the oral deodorant composition of the present invention can exhibit excellent deodorizing effects even on bad breath caused by eating strong-smelling foods and drinks derived from the genus Allium of the Liliaceae family, such as garlic, scallions, leeks, and onions. For example, the components that are considered to cause odors in foodstuffs belonging to the genus Allium of the Liliaceae family, such as garlic, shallots, leeks, and onions, are known to be allyl sulfides such as diallyl disulfide, methyl allyl disulfide, and methyl allyl polysulfide, as well as volatile organic sulfur compounds such as allyl mercaptan, allicin, vinyldithiin, and ajoene. According to the present invention, even these odors can be effectively deodorized. From this perspective, the oral deodorant composition of the present invention is useful for deodorizing unpleasant odors such as bad breath, and is particularly useful for deodorizing bad breath caused by the consumption of food, drink, or alcohol, smoking, or physical constitution. Furthermore, the oral deodorant composition of the present invention not only deodorizes odors derived from the genus Allium of the Liliaceae family, such as garlic, shallots, leeks, and onions, but also effectively suppresses the generation of unpleasant odors caused by the digestion and absorption of these, and therefore can effectively deodorize even such unpleasant odors. Furthermore, while there is a strong demand for deodorizing the so-called garlic odor, the oral deodorant composition of the present invention can effectively deodorize bad breath and body odor caused by garlic odor, particularly garlic odor excreted in the breath. In the present disclosure, deodorizing an unpleasant odor does not necessarily mean completely eliminating the odor; it is sufficient that the unpleasant odor is at least suppressed when the oral deodorant composition of the present disclosure is used compared to when it is not used. Therefore, in the present disclosure, deodorizing an unpleasant odor can also be said to be suppression of an unpleasant odor.

[0031] Therefore, the present disclosure can also be said to provide the use of a terpene-containing essential oil and charcoal powder for the manufacture of an oral deodorant composition, wherein the content of the essential oil in the composition is 20% by mass or more and 80% by mass or less, and the content of the charcoal powder is 3% by mass or more and 25% by mass or less. The present disclosure can also be said to provide the use of an oral deodorant composition for suppressing unpleasant odors, wherein the composition contains 20% by mass or more and 80% by mass or less of a terpene-containing essential oil and 3% by mass or more and 25% by mass or less of charcoal powder. The present disclosure can also be said to provide a method for suppressing unpleasant odors, comprising orally administering an effective amount of the oral deodorant composition to a subject in need of such suppression. In the use and method, the oral deodorant composition, terpene-containing essential oil, charcoal powder, optional ingredients that can be added, the content of each ingredient, the subject, etc. are all as described above.

[0032] Hereinafter, the embodiments of the present disclosure will be described more specifically with reference to examples, but the embodiments of the present disclosure are not limited to the following examples.

[0033] Test Example Test Procedure - Preparation of Oral Composition According to Table 1, the ingredients were mixed to prepare an oral composition. The ingredients used in this test example are as follows: Mint oil: Trade name Spearmint Oil ZX-3491, manufactured by Takasago International Corporation (Spearmint oil 90-100% (containing terpenes), CAS 8008-79-5) Charcoal powder: Trade name Umebee A brand activated carbon, manufactured by Taihei Chemical Industry Co., Ltd. (shape: powder, size: particle size 0.5-0.7 μm) Sunflower oil: Trade name J Himawari Shirin Oil NS, manufactured by J-Oil Mills Co., Ltd.

[0034] Evaluation of Deodorizing Effect: The deodorizing effect of the oral compositions (Examples 1-6, Comparative Examples 1-7, and Reference Example 1) was evaluated. Garlic was used as a representative example of odor, and the test was conducted at a scale of 1 / 20 that of a normal stomach. Specifically, 0.25 g of garlic paste (made by mashing raw garlic into a paste) and 12.5 mL of artificial gastric fluid (2 g of sodium chloride dissolved in 7 mL of hydrochloric acid and water to make 1000 mL; colorless and transparent, pH 1.2 at 25°C) were added to vial No. 7 (brown, 50 mL capacity) and mixed. 0.015 mL of the oral composition was further added to the vial and mixed. The vial was then capped and allowed to stand at 37°C for 15 minutes. Seven expert panelists evaluated odor intensity according to the following criteria using a 6-point odor intensity rating system. A lower value indicates a higher deodorizing effect.

[0035] [Criteria] 5: Strong odor 4: Strong odor 3: Easily detectable odor 2: Weak odor that is easy to identify 1: Barely detectable odor 0: Odorless

[0036] Results The results are shown in Table 1.

[0037]

[0038] The results of Comparative Examples 1 to 3 showed that the odor intensity decreased depending on the mint oil content (15% by mass, 25% by mass, and 50% by mass of mint oil). However, the odor intensity in Comparative Example 1 was 1.7, the odor intensity in Comparative Example 2 was 1.3, and the odor intensity in Comparative Example 3 was 1.1, indicating that the deodorizing effect of mint oil tends to plateau. Furthermore, the results of Comparative Examples 4 to 6 showed that although the odor intensity decreased when charcoal was used, the odor intensity in Comparative Example 4 was 3.4, the odor intensity in Comparative Example 5 was 3.2, and the odor intensity in Comparative Example 6 was 2.9, indicating that the deodorizing effect of charcoal was not high.

[0039] In addition, in Comparative Example 7, which used a combination of 15% by mass of mint oil and 6% by mass of charcoal, the odor intensity was 3.5. The odor intensity of Comparative Example 7 was significantly inferior to Comparative Example 1 (odor intensity 1.7, no charcoal) which contained 15% by mass of mint oil, and even inferior to Comparative Example 4 (odor intensity 3.4, no mint oil) which contained 6% by mass of charcoal. Thus, it was shown that the combined effect of mint oil and charcoal was inferior to when either mint oil or charcoal was used alone. This suggests that the combined use of mint oil and charcoal is actually unsuitable for deodorizing.

[0040] Thus, the deodorizing effect of the combination of mint oil and charcoal was significantly inferior to that of the combination of mint oil alone, and was inferior to or at most comparable to that of the combination of charcoal alone. From this, it was predicted that the deodorizing effect of the combination of, for example, 25% by mass of mint oil and 10% by mass of charcoal would be inferior to or comparable to that of Comparative Example 5 (odor intensity 3.2), which contained 10% by mass of charcoal.

[0041] However, contrary to this expectation, in Example 1, in which 25% by mass of mint oil and 10% by mass of charcoal were used in combination, the odor intensity was reduced to 1.1, which was significantly lower than Comparative Example 5 (odor intensity 3.2) which contained 10% by mass of charcoal. Furthermore, the deodorizing effect of Example 1 was even lower than Comparative Example 2 (odor intensity 1.3) which contained 25% by mass of mint oil. Similarly, in Example 2, in which 50% by mass of mint oil and 20% by mass of charcoal were used in combination, the odor intensity was low at 0.9, which was significantly lower than Comparative Example 6 (odor intensity 2.9) which contained 20% by mass of charcoal. Furthermore, the deodorizing effect of Example 2 was lower than Comparative Example 3 (odor intensity 1.1) which contained 50% by mass of mint oil.

[0042] Examples 1, 2, and the aforementioned Comparative Example 7 all share a common mint oil content ratio of 2.5 parts by mass per part by mass of charcoal. The reason why the combined use of mint oil and charcoal in Comparative Example 7 resulted in a poorer deodorizing effect than the use of either mint oil or charcoal alone is unclear. For example, it is thought that the mint oil is adsorbed onto the charcoal, impairing the deodorizing effect of the mint oil and also impairing the deodorizing effect of the charcoal. However, despite the same mint oil to charcoal content ratio as in Comparative Example 7, Examples 1 and 2 demonstrated excellent deodorizing effects. This indicates that when mint oil and charcoal are used in combination, it is desirable to use them in a certain amount or more. Furthermore, as shown in Examples 3 to 6, even when the mint oil content was 20, 30, or 40% by mass and the charcoal content was 10 or 20% by mass, the deodorizing intensity was significantly lower than in Comparative Example 5 (odor intensity 3.2) or Comparative Example 6 (odor intensity 2.9), which contained 10 or 20% charcoal by mass.

[0043] Furthermore, it was also found that the odor intensity was less than 1.2 even in the oral compositions (Examples 7 to 9) in which the charcoal content in Example 1 was changed to 3 wt %, 4 wt %, or 7 wt %.

[0044] Since the garlic odor intensity was effectively reduced in this way, it was understood that the composition can deodorize the odors originating from the genus Allium of the Liliaceae family, such as garlic, shallots, leeks, and onions, and can also effectively suppress the generation of unpleasant odors that arise when these are digested, absorbed, etc. Furthermore, from these facts, it can be said that the composition is useful for deodorizing bad breath caused by eating and drinking food and alcohol, smoking, and physical constitution.

[0045] Formulation Examples Oral deodorant compositions having the compositions shown in Table 2 or Table 3 below were prepared in the same manner as in the above test examples. These oral deodorant compositions were tested for odor intensity using the same method as in the "Evaluation of deodorant effect" above, and it was found that the odor intensity in each formulation example was less than 1.2, just like the above examples. In the tables below, peppermint white oil and eucalyptus oil are essential oils containing terpenes.

Claims

1. An oral deodorant composition containing 20% ​​by mass or more and 80% by mass or less of essential oils including terpenes, and 3% by mass or more and 25% by mass or less of charcoal powder.

2. An oral deodorant composition according to claim 1, containing 1.5 to 10 parts by mass of the essential oil per part by mass of charcoal powder.

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