benzimidazole is wellknown as a chemical compound , its first synthesis going back to over a hundred years ( synthesis by reaction of o - phenylenediamine with formic acid : wundt , ber . 11 , 826 ( 1878 )). this compound is very stable , particularly under heat , and it can withstand the action of concentrated acids , such as sulfuric and hydrochloric acids , and of alkalis . moreover , this compound has a wellknown biological activity , due to its chemical relation with histamine , and to its presence in the molecule of vitamin b12 ( where it forms a bridge between the cobalt and one of the lateral chains , bonding of said chain being achieved with an amino - alcohol residue ). benzimidazole and its derivatives are also already known to have pharmacological properties , which are not incompatible with their use within the scope of the present invention . for example , the action of some of its derivatives on vasomotricity has been described , as well as the action of others against malaria . it has also been shown that some of its derivatives exhibited remarkable fungicidal properties , of spectrum higher than that of griseofulvine , which are due to the blocking of the protein synthesis but which can be inhibited by the antagonist action of adenine , guanine , nucleic acids and vitamin b12 . . . a study of the various pharmacological properties of the benzimidazole and of its derivatives has revealed the innocuousness of those substances . in particular , the ld 50 of benzimidazole has been determined by the &# 34 ; up and down &# 34 ; method in mice . said ld 50 varies after 30 days , from 0 . 520 to 0 . 610 mg / g . in the course of his works , the applicant has determined the selective affinity and persistant concentration of benzimidazole and its derivatives , at the level of the gastro - duodenum mucosae , as well as the advantage that there is in ingesting said product or products at the same time as food products liable to cause stimulation and hypersecretion of said mucosae . the selective affinity of benzimidazole towards the gastric mucose in mice and dogs as well as in humans , was established by autoradiographic and gammagraphic techniques , using the benzimidazole labeled with carbon 14 or iodine 131 and injected by intraperitoneol or intraveinous route . it was found in both cases that the distribution of the labeled product was homogeneous already 15 minutes after the injection , but that after 3 hours , the radioactivity of most of the tissues was very low , except for that of the stomach and of the gastric contents which continue to increase and keeps up for over 6 hours to disappear within 24 hours . said tests have also shown that the benzimidazole is easily and totally eliminated , especially through the urinary system , and is free of any residual toxicity both in animals and humans , even at the concentrations observed at the level of the gastro - duodenum mucosae . the applicant also measured the ed 50 in mice ( 22 - 28 g ), in anti - salivation tests ( salivation induced by subcutaneous injection of pilocarpine : ed 50 & gt ; 100 mg / kg p . o .) and intestinal motricity tests ( using charcoal : ed 50 & gt ; 100 mg / kg p . o .). up to doses of over 100 mg / kg p . o ., the benzimidazole has no effect on salivation and does not reduce intestinal motricity . the present invention recommends the use of this compound and / or of at least one of its derivatives in food products . it is therefore the object of the present invention to provide food products which contain benzimidazole and / or at least one of its derivatives , and more particularly food products the ingestion of which is known to cause the stimulation and hypersecretion of the gastric and / or duodenum mucosae ; said food products being known for their acidity . according to the invention , said food products contain said benzimidazole and / or at least one of its derivatives , in efficient quantity to arrive at the expected result which is to improve assimilation by the body system . a perfect digestion of the products is thus reached in that said products have been made digestible . the combination of the food product with the benzimidazole , and / or at least one of its derivatives , according to the invention , is very advantageous . it makes it possible to abort any gastro - duodenum non - tumorous disorders , to prevent pains ( stomach pains ) from occurring , after the ingestion of products known to be difficult to digest . it has a preventive action . the applicant has further established that gastric disorders also affected young children and newborn babies . thus , according to one of its aspects , the invention relates to food products for children and / or newborn babies , which contain benzimidazole and / or at least one of its derivatives . one example is milk for newborn babies , in powder form if appropriate . examples of food products , which advantageously contain benzimidazole and / or one of its derivatives , according to the invention , are as follows : pasta , bread , sauces , jam , marmalade , jellies , sweets , ice - creams , chocolates , desserts , biscuits , coffee , tea , sausages , oils , . . . it will be noted at this stage that , in the present text , the terms &# 34 ; food product &# 34 ; includes drinks such as alcoholic drinks , fruit juices , gaseous or non - gaseous mineral waters , . . . the quantity of benzimidazole and / or analogue or analogues used is not critical insofar as the product is not toxic and has no secondary effects . an adult can ingest between 15 and 30 mg daily , against 5 to 15 mg for a newborn baby or a child ( 8 - 10 years old ) without any danger . it is of course advised to use a sufficient quantity of the product in order to obtain the expected result . incidently , it should be noted that the presence of the benzimidazole , and / or of at least one of its derivatives , in the food products , does not affect either their flavor , ( taste and smell ), or their appearance . bread containing , for 100 g , between 15 and 25 mg of benzimidazole and / or at least one of its derivatives ; coffee containing , for 1 kg , about 500 mg of benzimidazole and / or of at least one of its derivatives ; pasta containing , for 1 kg , about 150 mg of benzimidazole and / or of at least one of its derivatives ; sauces containing , for 100 g , between 50 and 60 mg of benzimidazole and / or of at least one of its derivatives ; jam containing , for 1 kg , about 100 mg of benzimidazole and / or of at least one of its derivatives ; alcoholized drinks such as whisky , cognac , liqueurs , wines , champagnes , . . . containing for example between 60 and 200 mg / liter of benzimidazole and / or of at least one of its derivatives ; beers containing for example between 30 and 70 mg / liter of benzimidazole and / or of at least one of its derivatives ; fruit juices or analogues , such as grape juice , orange juice , grapefruit juice , lemon juice , pineapple juice , peach juice , apple juice or lemonade , coca - cola or cider , . . . containing for example between 25 and 60 mg / liter of benzimidazole and / or of at least one of its derivatives ; gaseous or non - gaseous mineral water , . . . containing for example between 10 and 25 mg / liter of benzimidazole and / or of at least one of its derivatives . for making the bread which , according to the invention , contains benzimidazole and / or at least one of its derivatives , the flour used will advantageously contain between 20 and 25 mg of said benzimidazole and / or of at least one of its derivatives per kg . it is clear from the foregoing that the action of the benzimidazole and / or of at least one of its derivatives , is not strictly limited to such or such a quantity for such or such a type of product . the combination of a food product with benzimidazole , and / or at least one of its derivatives , does not either raise any elaboration problems , particularly due to the stability of said chemical substances . according to another of its aspects , the invention relates to a method for preparing a food product and to a method for treating a food product so as to facilitate its assimilation by the body system , said methods consisting in : either including benzimidazole and / or at least one of its derivatives , during the preparation of the food product ; or adding said benzimidazole and / or at least one of its derivatives in said prepared food product . the use of said benzimidazole and / or at least one of its derivatives during the preparation of the product and at the final product stage , cannot be excluded . the invention therefore proposes a novel use of the benzimidazole and of its derivatives , in food products , in order to make them easier to assimilate for the body system . in other words , the invention proposes a method to facilitate the assimilation of food products in the body system , which method consists in incorporating benzimidazole and / or at least one of its derivatives therein .
a method for promoting digestibility of a food product having an acid character which , when ingested , causes stimulation and hypersecretion of gastric and / or duodenum mucosae . the method comprises incorporating into the food product a sufficient amount of benzimidazole or a benzimidazole compound of the formula : ## str1 ## where x and y independently represent an alkyl group , a phenyl group or a halogen atom and n = 1 to 4 .