为什么肠线不吸收，肠道为何不能吸收肠线？

Whenweconsumefood,ourdigestivesystemconstantlyworkstowardsbreakingdownthefoodfortheabsorptionofnutrients.However,therearecertainthingsthatthedigestivesystemcannotbreakdown,andoneofthemisintestinalordigestivetractlining,alsoknownas“gutstrings.”Gutstringsarematerialderivedfromintestinesofdomesticatedanimals,suchasbeef,andareusedinvariousculinarydishesinmanycultures.Despitetheirpopularity,gutstringsdonotgetabsorbedbytheintestine,raisingthequestion:Whyexactlycan’tourintestinesabsorbgutstrings?

Beforewedelveintowhygutstringscan’tbeabsorbedbytheintestines,it’simportanttounderstandthecompositionofgutstrings.Gutstringsareprimarilycomposedofcollagen,afibrousproteinthatmakesup25%to35%ofthetotalbodyproteininmammals.Thisproteinishighlyresistanttoenzymaticdigestion,makingitdifficultforthedigestivesystemtobreakdown.

Whenweeatfood,variousenzymesarereleasedintoourdigestivesystem,suchaspepsinandtrypsin,whichbreakdownproteinsintosmallerpeptidesandaminoacidsthatcanbeabsorbedbytheintestines.However,theseenzymesareunabletobreakdowncollagen,theprimarycomponentofgutstrings.

Collagenismadeupoflong,toughfibersthataredifficulttobreakdown.Whenweeatfoodcontaininggutstrings,thedigestivesystemisunabletocompletelybreakdownthecollagenfibersastheenzymesproducedbythedigestivesystemareineffectiveagainstthesefibers.Asaresult,theundigestedgutstringspassthroughtheintestinesandgeteliminatedwiththefeces.

Insummary,gutstringsarenotabsorbedbytheintestinesduetotheircomposition,whichprimarilyconsistsoftoughcollagenfibersthatareresistanttoenzymaticbreakdown.Thedigestivesystemisunabletodigestthecollagenfibers,whichresultsintheundigestedgutstringsbeingeliminatedthroughfecalmatter.Whilegutstringsmaybeapopularingredientinmanyculinarydishes,theydonotprovideanynutritionalvalueastheycannotbeabsorbedbythebody.

Keywords:gutstrings,collagen,enzymes,absorption,digestion