Vitamin A deficiency

Causes

VitaminAdeficiencycausedbyvariousreasons.Forexample,chronicdiarrhea,liverandgallbladderdisease,albuminreductionisnotenoughtotransportvitaminA,andseverewastingdiseasecausesexcessiveconsumptionofvitaminA,whichcanleadtovitaminAdeficiencysymptoms.VitaminA0.3╬╝gisequivalentto1internationalunit(U).Theminimumdailyrequirementforadultsis20U/kgor40U╬▓-carotene.Infact,thedailysupplyforadultsshouldnotbelessthan5000U.

Vitamin A deficiency

Clinicalmanifestations

Patientsshouldeatmoremilk,eggyolks,livers,andcarrotsrichinvegetarianfoodstoactivelytreatthechronicorunderlyingdiseasesdiscovered.OralvitaminAis50,000U/d,andseverecasesare100,000to200,000U/d.Itwillbereducedlater.Long-termlarge-scaleusecancausevitaminAhypertrophy.Ifitiscombinedwithothervitamindeficiencies,itshouldbesupplementedaccordingly.Payattentiontoprotecttheskinlesionsoftheeyesandusecodliveroilointment,10%ureacream,tretinoincream,etc.forexternaluse.

TraditionalChineseMedicineMethod

Therapeuticmethod:invigoratethespleenandstomach,nourishbloodandmoisturizetheskin.

Prescriptions:Atractylodesmacrocephala10g,Poriacocos10g,Tangerinepeel10g,Lentils10gAngelica10g,Redpeonyroot10g,Muxiang10g,Stir-friedrice30g,Stir-friedGorgon15g,Salvia15g,Stir-friedCitrusaurantium10g,SandRen10g.ItcanbeappliedtoBazhenPills,GinsengJianpiPills,JiaweiBaohePills,etc.

Prevention

ChronicwastingdiseasesandexcessivedrinkingrestrictionsshouldpayattentiontosupplementingvitaminA.

Pathogenesis

VitaminAconstitutestheretinalphotosensitivepigmentrhodopsinandplaysanimportantroleinnightvisionandparticipatesincarbohydratemetabolismandglycoproteinsynthesistomaintainthegrowthanddifferentiationofepithelialtissues.Whenitisdeficient,thelevelsofretinalrhodopsinandopsindecrease,leadingtonightblindness.Scalymetaplasiaofthemucousmembranesoftheeyes,upperrespiratorytractandgastrointestinaltract,causingmucosalkeratosisandhyperkeratosis,resultingindryeye,dryskindesquamation,follicularkeratosis,papulesandaseriesofeyeandskinsymptoms.

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