hereinafter , the orally administrable sebum secretion inhibiting composition comprising a collagen hydrolysate of the present invention and the food or drink product containing the composition are described . collagen is a main protein component constituting connective tissue in animals and is characterized by having a collagen triple helical structure . a total of not less than 30 types of collagen have been reported which are respectively termed type i , type ii , and so on . type i collagen is the primary component of the derma , ligaments , tendons , bones and the like ; and type ii collagen is the primary component of articular cartilage . further , type iv collagen is mainly contained in a basal membrane , which is the undercoat of all epithelial tissues . type i collagen is the most abundant collagen in the body . in the sebum secretion inhibiting composition of the present invention , the collagen origin is not limited , and usable are those derived from mammals such as cow , pig , etc ., birds such as chicken , ostrich , etc ., fishes such as sharks , etc . those derived from livestock such as cow , pig , chicken , etc ., are easily obtainable in a large amount , hence particularly preferable . further , the type of collagen is not limited and any type can be used , or a plurality of collagen types may be used in mixture . in the present invention , the collagen hydrolysate ( hereinafter sometimes referred to as collagen peptide ) refers to a low molecular collagen obtained by hydrolyzing collagen with an acid , alkali or enzyme . for example , a collagen hydrolysate can be obtained by immersing skins and joints of animals such as pig , cow and chicken or scales and skins of fish in an acid or alkali solution to extract gelatin and treating the extracted gelatin with an enzyme or acid . the gelatin refers to the collagen pre - treated with an acid or alkali and then solubilized by heat hydrolysis . the sebum secretion inhibiting composition of the present invention is for oral administration , but the dosage form is not limited and can be administered in the form of , for example , tablets , capsules , drinks , etc . further , the sebum secretion inhibiting composition of the present invention may be administered by being contained in a food or drink product , and , in that case , the food or drink product in which the composition is contained are not limited , and examples include carbonated drinks , nutritional drinks , liquors , sweets , nutritional food products , frozen sweets , dairy products , meats , etc ., and food products as a raw material to be used for these products . the sebum secretion inhibiting composition of the present invention refers to a composition which inhibits sebum secreted from skin and the skin may be derived from any site of the body , but face , head , chest , back , armpits , genital area , etc ., known as the areas where sebaceous glands are dense have abundant sebum secretion , hence are included as target sites . hereinafter , the present invention will be described in detail with reference to examples . however , the present invention is not limited to the following examples . for the collagen hydrolysate , a commercial “ collagen peptide ” ( pig ) having a molecular weight of 20000 or less was used . the collagen peptide used was obtained by immersing the pig skin in an acid or alkali solution to extract gelatin and further enzymolyzing the extracted gelatin . the collagen peptide is mainly derived from pig type i collagen . for the test meal containing the collagen peptide , a powder test meal comprising the composition shown in table 1 was prepared . the powder test meal contains 10000 mg of collagen peptide and 100 mg of vitamin c per meal . vitamin c is added because it is required to synthesize collagen in vivo . sixteen men in their twenties and thirties as the subjects orally ingested the powder test meal . the subjects took one meal of the powder test meal added to milk , juice , miso soup or the like at any convenient time once a day for 12 consecutive days . the sebum amount of the subjects was measured before , during and after the ingestion of the powder test meal . on the measurement day , the subjects washed their faces with warm water and a facial soap at 1 p . m ., and 2 hours later , i . e ., around 3 p . m ., the measurement was carried out . the measurement was carried out , using an optical sebum measurement apparatus , triplesense ( moritex precision corporation ), by pressing the sensor part of the measurement apparatus against a spot about 3 cm below the eye on the face of the subject . the value ( arbitrary unit a . u .) indicated as an oil content measurement value by the measurement apparatus was referred to as the sebum value . before ingesting the powder test meal , 10 of the subjects had a sebum amount of 40 a . u . or more , whereas 6 subjects had a sebum amount of below 40 a . u . these groups were termed as the preingestion sebum amount ≧ the 40 - group and the preingestion sebum amount & lt ; the 40 - group , respectively . table 2 shows the average value of the sebum amount of all subjects , the average value of the sebum amount of the preingestion sebum amount ≧ the 40 - group and the average value of the sebum amount of the preingestion sebum amount & lt ; the 40 - group before ingesting the powder test meal , 1 week and 2 weeks after the start of ingestion and 1 week after the completion of ingestion . similarly , the results in the form of graph are shown in fig1 . in fig1 , δ represents the average value for all subjects , ∘ represents the average value of the sebum amount of the preingestion sebum amount ≧ the 40 - group , and □ represents the average value of the sebum amount of the preingestion sebum amount & lt ; the 40 - group . after ingesting the powder test meal , all groups had reduced sebum amounts in comparison with before ingestion which revealed that the sebum secretion was inhibited owing to the ingestion of the powder test meal . in particular , the sebum secretion inhibitory effect was significant in the preingestion sebum amount ≧ the 40 - group which leads to the presumption that people with oily skin inherently are most likely to benefit the effect . the effect already started showing within 1 week after the ingestion and the sebum amount increased again 1 week later from the ingestion which leads to the presumption that the effect can be attained in a comparatively short period of time . the same test was also carried out for the group which did not ingest the powder test meal but the sebum inhibitory effect was not observed . examples of application of the deodorized collagen peptide obtained based on the above test results to drink or food products or compositions , are shown below . using the present product ( collagen peptide ) prepared by the methods described in example 1 , a drink , a powder , a tablet , a chewing gum , a candy , a tablet candy , a gummy jelly , a chocolate and a sorbet were produced with the following formula . collagen peptide 5 . 0 parts by weight high fructose corn syrup 8 . 0 parts by weight sugar 4 . 0 parts by weight flavor 0 . 5 parts by weight vitamin c 0 . 5 parts by weight after adjusting ph to 3 . 8 using an acidifier , the drink was prepared to be 100 parts by volume with purified water . collagen peptide 5 . 0 parts by weight sucralose 0 . 005 parts by weight stevioside 0 . 008 parts by weight rebaudioside 0 . 008 parts by weight acesulfame potassium 0 . 01 parts by weight peach flavor 0 . 5 parts by weight vitamin c 0 . 5 parts by weight after adjusting ph to 3 . 8 using an acidifier , the drink was prepared to be 100 parts by volume with purified water . after adjusting ph to 3 . 8 using an acidifier , the drink was prepared to be 100 parts by volume with purified water . after adjusting ph to 3 . 8 using an acidifier , the drink was prepared to be 100 parts by volume with purified water . after adjusting ph to 3 . 8 using an acidifier , the drink was prepared to be 100 parts by volume with purified water . after adjusting ph to 3 . 8 using an acidifier , the drink was prepared to be 100 parts by volume with purified water . after adjusting ph to 6 . 5 using sodium bicarbonate , the drink was prepared to be 100 parts by volume with purified water . after adjusting ph to 6 . 5 using sodium bicarbonate , the drink was prepared to be 100 parts by volume with purified water . hereinabove , the present invention has been described with reference to examples but can be carried out without being limited to these embodiments of the present invention . this application claims the priority to the japanese patent application no . 2009 - 297848 , filed on dec . 28 , 2009 , and the contents of which is hereby incorporated by reference as a part of the present application .
an object is to provide a sebum secretion inhibiting composition and a food or drink product using the same . the present inventors have conducted extensive studies and consequently found that the sebum secretion is inhibited by orally ingesting a collagen peptide , which is hydrolyzed collagen , and provide an oral sebum secretion inhibiting composition comprising a collagen hydrolysate and a food or drink product containing the composition .