Soonka ayaa inta badan loo isticmaalaa hab wax ku ool ah oo lagu dhimo miisaanka, laakiin sidoo kale wuxuu ka caawiyaa jirku inuu la dagaallamo cudurrada. Soonka laba maalmood oo keliya ayaa u oggolaanaya unugyada difaaca inay dib u soo kabtaan, ka caawinta jidhku inuu la dagaallamo caabuqa.
Saynis yahano ka tirsan jaamacada koonfurta California ayaa tijaabiyay saamaynta 2-4 maalmood ee soonka ee jiirka iyo bini-aadmiga muddo lix bilood ah. Labada xaaladoodba, koors kasta ka dib, hoos u dhaca tirada unugyada dhiiga cad ee dhiiga ayaa la duubay. Jiirarka, natiijada wareegga soonka awgeed, habka dib u cusboonaysiinta unugyada dhiigga cad ayaa la bilaabay, sidaas awgeed dib u soo celinta hababka difaaca jirka. Walter Longo, oo ah borofisar ku takhasusay cilmiga gerontology iyo cilmiga bayoolojiga ee Jaamacadda Koonfurta California, ayaa yidhi: “Soonku waxa uu siinayaa iftiinka cagaaran si loo kordhiyo tirada unugyada asliga ah, dib u soo celinta nidaamka oo dhan. Warka wanaagsani waxa uu yahay in marka la soomo uu jidhku ka takhaluso unugyadii gaboobay ee dhaawacan. Waxa kale oo ay daraasaddu muujisay in soonku uu yareeyo soo saarista hormoonka IGF-1, kaas oo la xidhiidha khatarta kansarka. Tijaabo tijaabo yar oo tijaabo ah ayaa lagu ogaaday in soonka 72 saacadood ka hor daawaynta kemotherabi ay ka hortagtay bukaanada inay noqdaan kuwo sun ah. “In kasta oo daawayntu ay badbaadiso nolosha, haddana sir ma aha inay sidoo kale saameyn weyn ku leedahay habka difaaca jirka. Natiijooyinka daraasaddu waxay xaqiijinayaan in soonku uu yarayn karo qaar ka mid ah saameynta daaweynta kemotherabi,” ayay tiri Tanya Dorff, oo ah kaaliyaha borofisar daawaynta caafimaadka ee Jaamacadda Koonfurta California. "Cilmi-baaris caafimaad oo dheeraad ah ayaa loo baahan yahay mawduucan oo noocan ah faragelinta cuntada waa in lagu sameeyaa oo kaliya iyadoo la raacayo hagida dhakhtarka."