in the present invention , the cocoa component means a component of chocolate liquor from which cocoa butter is removed , and mainly contains proteins , saccharides , dietary fibers ( water - soluble hardly - digestible polysaccharides , hemicellulose , cellulose , lignin , etc . ), phospholipid , inorganic substances ( phosphorus , magnesium , calcium , iron , zinc , copper , potassium , sodium , etc . ), vitamin a , vitamin b group , vitamin c , vitamin e ( various types of tocopherol , etc ), niacin , oxalic acid , citric acid , malic acid , succinic acid , lactic acid , acetic acid , tannin ( polyphenols such as epicatechin , catechin and quercetin ) anhydrous caffeine , theobromine and the like . in order to impart the above cocoa component , as a material to be added to the pharmaceutical , food or drink , and feedstuff , for example , cocoa powder obtainable by removing cocoa butter from chocolate liquor , or chocolate liquor itself , may preferably be used . the pharmaceutical of the present invention may be any one so far as it contains the cocoa component as an active ingredient . the form of product thereof is not particularly limited , and may be in various forms such as tablets , powder ( granules ), capsules and drink . further , in the case of a pharmaceutical intended to obtain the wound healing - promoting effect , it may be in the form of ointment , medical application and the like . the food or drink of the present invention may be any one so far as it contains the cocoa component and other nutrient source . the form of product thereof is not particularly limited , and may be produced as cocoa drink , formulated cocoa , chocolate and the like . the other nutrient source is not particularly limited , but proteins such as lactoprotein and soybean protein , lipids such as vegetable oil , saccharides such as sugar and dextrine , vitamins , minerals and the like may preferably be used . further , for persons in such a state of pathology that they can not ingest usual meal , for example , persons who have damages of head , face or mouth cavity , consciousness disorder , inappetence or the like , but have normal digestive organs at a certain level , the food or drink of the present invention may be given as an enteral feeding food . the enteral feeding food may be prepared by mixing the cocoa component and other nutrient source with a nutritional requirement / day as a standard , and used as a powder mixture , or the mixture may be dissolved in water or the like in an adequate amount . as a method for ingesting the enteral feeding food , for example , for persons who are capable of eating and drinking , it may be ingested orally , or for a persons who are not capable of eating and drinking , a method may be used wherein it is administered through nose using a tube or through an opening formed on stomach or intestine ( tube feeding ). further , the feedstuff of the present invention may be obtained by adding the cocoa component to usual feedstuff . as the above usual feedstuff , there is no particular limitation , and various feedstuffs commercially available as feedstuff for dog , cat , rat , mouse , hamster , chicken , pig , cow , etc ., and ones prepared by appropriately blending ones usually used as feedstuff materials , may be used . specifically , for example , ones containing protein sources such as soybean lees and white fish meal , lipid sources such as soybean oil , fiber sources such as alphalpha meal , carbohydrate sources such as wheat , corn , wheat bran , germ , yeast , defatted rice bran and milo , vitamins such as vitamins a , d 3 , e , b 1 , b 2 , b 3 and b 12 , calcium pantothenate , niacin , folic acid and choline chloride , and minerals such as caco 3 , nacl , feso 4 , mnco 3 and coso 4 . 7h 2 o , may preferably be used . further , as a method for adding the cocoa component , there is no particular limitation , and the cocoa component may be sprinkled over commercially available feedstuff , blended with other feedstuff materials to form a powder feedstuff , or processed in a pellet - like form . in the present invention , in the case of the pharmaceutical having the effect for eradicating helicobacter pylori , it is preferred to add an antibiotic for eradicating helicobacter pylori and / or an acid secretion inhibitor . as the antibiotic for eradicating helicobacter pylori , clarithromycin may , for example , be mentioned . further , as the acid secretion inhibitor , proton pump inhibitor ( ppi ) and h2 blocker ( h2ra ) may , for example , be mentioned . in the present invention , in order to obtain the effect for eradicating helicobacter pylori , it is desirable to ingest the cocoa component in an amount of at least 5 g per day in terms of chocolate liquor . further , in order to obtain the effect for eradicating helicobacter pylori by ingesting the cocoa component as the food or drink and feedstuff , it is desirable that the cocoa component is contained in the food or drink and feedstuff in an amount of from 3 . 5 to 10 wt % in terms of a solid content . on the other hand , in the present invention , the effective administration amount of the cocoa component to obtain the wound healing - promoting effect , is from 0 . 8 to 40 g per day in terms of chocolate liquor . further , in order to obtain the wound healing - promoting effect by ingesting the cocoa component as the food or drink , it is preferred that the cocoa component is contained in the food of drink in an amount of from 0 . 1 to 10 mass % in terms of a solid content . furthermore , the feedstuff having the wound healing - promoting effect of the present invention , is obtainable by adding the cocoa component to usual feedstuff in an amount of from 1 to 15 mass % in terms of a solid content . in the present invention , the effective administration ( intake ) amount of the cocoa component to obtain the effect for reducing a blood ammonia concentration , is from 0 . 8 to 40 g per day in terms of chocolate liquor . further , in order to obtain the effect for reducing a blood ammonia concentration by ingesting the cocoa component as the food or drink , it is preferred that the cocoa component ( a component of chocolate liquor from which cocoa butter is removed ) is contained in the food or drink in an amount of from 0 . 1 to 10 mass % in terms of a solid content . moreover , the feedstuff having the effect for reducing a blood ammonia concentration is obtainable by adding the cocoa component to usual feedstuff in an amount of from 1 to 15 mass %. the present invention will be described in detail with reference to examples . commercially available formulated cocoa ( milk cocoa ) prepared by blending starting materials of cocoa powder , sugar , dry milk , skim milk and the like in the form of powder , was used as an agent for eradicating helicobacter pylori . the composition in 24 g of this formulated cocoa is as indicated in table 1 , and the calorie thereof was 95 kcal . with patients of gastric ulcer and / or duodenal ulcer , having no history of elimination of helicobacter pylori , the cocoa obtained in the example was administered while being subjected to a conventional elimination method , to research the elimination effect . here , the conventional elimination method is a method wherein a proton pump inhibitor ( ppi ) as an acid secretion inhibitor and clarithromycin ( cam , 400 mg / day ) as an antibiotic for eradicating helicobacter pylori are administered in combination , and then ppi and h2 blocker which is also an acid secretion inhibitor ( hereinafter referred to as h2ra ) are administered in combination . specifically , ppi + cam administration was carried out for ten days , and subsequently ppi was administered over one month , subsequently h2ra was administered , and then urease method ( u ), histological test method ( p ) and culture examination method ( c ) were carried out for evaluation of elimination . and , if at least two types of inspection i . e . the urease method and the culture examination method , out of these methods , show negative , it can be concluded that the elimination is successful . here , the administration of cocoa was carried out by adding about 120 ml of hot water to about 24 g of the commercially available formulated cocoa obtained in example 1 to obtain one cup amount , and during the above time for elimination , at least one cup was drunk a day . the test results are indicated in table 2 . from the results of table 2 , it was found that by ingesting the cocoa in combination , it was possible to eliminate helicobacter pylori at a high rate ( elimination rate : 75 %) as compared with an elimination rate by a conventional elimination method in this - facility ( 45 %). with patients who had a history of elimination by a conventional elimination method , but were not successful in eradicating , cocoa was administered together with the conventional elimination method as used in test example 1 , and the elimination effect was researched . the results are indicated in table 3 . from the results of table 3 , it was found that by administering the cocoa in combination , 3 out of 5 patients who were not successful in eradicating by the conventional elimination method , were successful in eradicating helicobacter pylori . further , taking the results of table 2 together in consideration , by administering the cocoa together with the conventional elimination method , the elimination rate of the conventional elimination method can be improved to a great extent . different from test examples 1 and 2 , it was attempted to conduct elimination by administering the acid secretion inhibitors ( ppi + h2ra ) and the cocoa in combination for more than 6 weeks or longer without using the antiseptic for eradicating helicobacter pylori . as indicated in table 4 , one case out of two cases , was successful . this result shows the possibility of elimination accompanying no substantial side effect . a solid feedstuff was prepared ( asked nippon clea co .) by adding 12 . 5 % of pure cocoa ( tradename : morinaga pure cocoa , manufactured by morinaga & amp ; co ., ltd .) to feedstuff ce - 2 ( tradename , manufactured by nippon clea co .). the feedstuff ce - 2 contains soybean lees and white fish meal as protein sources , soybean oil as a lipid source , alphalpha meal as a fiber source , wheat , corn , wheat bran , germ , yeast , defatted rice bran and milo as carbohydrate sources , vitamins a , d 3 , e , b 1 , b 2 , b 3 and b 12 , calcium pantothenate , niacin , folic acid and choline chloride as vitamins , and caco 3 , nacl , feso 4 , mnco 3 , coso 4 . 7h 2 o as minerals . 6 wister male rats ( 6 weeks old ) preliminarily fed for one week , were separated into two groups ( each group consists of 3 rats ), and during the test period , ce - 2 was freely ingested by a control group , and the cocoa component - containing solid feedstuff obtained in example 2 was freely ingested by a test group . and , after 2 weeks from the point that the ingestion of the feedstuff started , under anaesthesia of pentobarbital , hairs on the back of each rat was removed and then the skin of about 1 cm square at the hair - removed portion was cut out . then , the condition of the wound surface was observed everyday ( taking a photograph ) and the size ( area ) of the wound surface was measured . the results are indicated in table 5 . from the results of table 5 , it was found that the size of the wound surface decreased with the lapse of time in both of the control group and the test group . particularly , in the test group , the residual rate of the wound surface was small and the wound healing was fast . further , on the 3rd , 7th and 12th days after the removal of the skin , the tissues of the wound surface including normal portions of the rats of respective groups were collected , and stored in a neutral buffered formalin . and , sections embedded in paraffin of tissues collected by a conventional manner were prepared , and subjected to azan ( modified method ) stain (“ how to prepare histopathological samples ”, edited by yonosuke watanabe and two others , igaku shoin ), and then observed by a microscope ( 100 magnifications ) . as a result , on the wound surface of the rat ( no . 6 ) of the test group on the 12th day , the epithelial tissue was entirely regenerated and no symptom such as inflammation was seen . however , on the wound surface of the rat ( no . 3 ) of the control group , only a slight regeneration of the epithelial tissue was revealed and a symptom of inflammation was seen . from the above results , it was found that by ingesting the cocoa component , the wound healing was promoted . 10 wister male rats ( 7 weeks old ), were separated into two groups ( each group consists of 5 rats ), and during the test period , ce - 2 was freely ingested by a control group , and the cocoa component - containing solid feedstuff obtained in example 2 was freely ingested by a test group . and , after 3 weeks from the point that the ingestion of the feedstuff started , feces of rats of respective groups were collected , and odors of feces ( ammonia and methylamine ) were measured with a kitagawa type gas detector . further , with the rats of respective groups , blood was collected from the heart and the ammonia concentration in blood ( blood serum ) was measured . the results are indicated in table 6 . from table 6 , it was found that the average concentrations of ammonia and methylamine in feces of rats of the test group to which the cocoa component was supplied , were remarkably low as compared with the control group . further , it was also found that the average ammonia concentration in the blood of rats of the test group was low at a level of significance as compared with the control group ( risk : 5 % or less ). from the above results , it is believed that by ingesting the cocoa component , the formation of ammonia and the like in feces can be suppressed and the blood ammonia concentration can be reduced . further , although the cause is not known , no definite interrelation between the ammonia concentration in feces and the blood ammonia concentration of each sample was admitted . accordingly , it is also expected that the absorption of ammonia by intestinal canal might be directly inhibited by the cocoa component . as mentioned above , according to the present invention , a pharmaceutical , food or drink , and feedstuff having an effect for eradicating helicobacter pylori , a wound healing - promoting effect , and an effect for reducing blood ammonia concentration .