Isitofu esingenanaliti ye-QS-K sinomsebenzi ofanayo wokuhamba njenge-QS-P, ikwayindlela esebenza entwasahlobo. Umahluko ophambili kukuba i-QS-K yenzelwe ukufaka iHormone yokuKhula koMntu (HGH). Ihomoni yokukhula komntu ifana kakhulu ne-insulin xa isiza kulawulo, iphathwa ngenaliti. Nangona kunjalo, kubantwana abanesifo seswekile se-I, ukunqongophala ngokupheleleyo kwe-insulin kubangela ukuba abantwana babe needosi ezi-4 okanye ngaphezulu ze-insulin yangaphandle kanye ngosuku, kwaye ubuncinane iinaliti ze-1460 ziyadingeka kwiintsuku ezingama-365 ngonyaka. Kukho malunga nezigidi ezisi-7 zabantwana abaneminyaka emi-4 ukuya kwi-15 abanengxaki yokuncipha kwaye bafuna inaliti yemihla ngemihla yehomoni yokukhula eTshayina. Unyango njengesiqhelo lumalunga neenyanga ezili-18, kwaye inani lilonke lezitofu malunga namaxesha angama-550. Ke ngoko, ingxaki ye "needle phobia" ebantwaneni ibe ngumqobo omkhulu kunyango lwenaliti yehomoni yokukhula. Okokuqala, inani labantwana abanyangwa ngenaliti yehomoni yokukhula abangaphantsi kwama-30,000 abantwana ngenxa “yokoyika”. Isizathu sesibini kukuba ukuthotyelwa kwabantwana kunye nonyango lwe-hormone yokukhula akukho ngaphezu kwe-60% ngenxa yesitofu sexesha elide, unyango oluphezulu lwe-hormone yokukhula. Ke ngoko, ukusombulula ingxaki yokoyika inaliti kwinaliti yehomoni yokukhula kunokophula ingxaki yonyango lobuncinci.
I-QS-K yi-injector yoyilo ekhethekileyo, ine-cap ephindwe kabini. Enye ikepusi kukukhusela i-ampoule ukunqanda uthuli kunye nokungcoliseka kwaye i-cap ephakathi nendawo kukufihla i-ampoule ukwenza inaliti iqinisekise ngakumbi. Ubume be-QS-k bujongeka njengethoyi yephazili, sinethemba lokuba abantwana abayi kuba nexhala ngexesha lokutofa endaweni yoko banokonwabela. Umvelisi wesibini omkhulu we-HGH usayine isivumelwano esikhethekileyo kunye neQuinovare, oku kubanceda ukuba banyuse ingeniso yabo abantwana abanoloyiko lweenaliti baya kukhetha ukusebenzisa isitofu esingenanaliti njengonyango lokutofa iHGH.
Umda wenaliti yokukhula ayingowabantwana kuphela, kodwa nakwabantu abadala. I-QS-K ikwasetyenziselwa ukulwa nokuguga kwe-HGH kubantu abadala. E-China, bonke abavelisi be-hormone yokukhula baye baqala ukuvakalisa izibonakaliso ezichasayo ze-HGH kubantu abadala, kwaye baqalise imfundo kagqirha. Ngophuculo lwemigangatho yokuphila yesizwe kunye nophuhliso olukhawulezayo loqoqosho, abantu abadala ngakumbi nangaphezulu kweminyaka engama-40 bayanda imfuno yokuchasana nokuguga, eli qela leleqela elinamandla abalaseleyo okusebenzisa kwaye linamandla okuthenga iisirinji zasimahla zenaliti, nto leyo eyenza ukuba ukuthengiswa kwehomoni yokukhula kwinaliti yasimahla ibenendawo eyongezelelekileyo kule minyaka ilishumi izayo.