Mai zafi yana ƙyalli shine tsarin aikin sitiriyo wanda ke saman ƙarfe a saman zafin jiki na recrystallization zazzabi, wanda ke ba da damar riƙe kayan da aka lalata yadda yake sanyi. ... Duk da haka, da aka yi amfani da shi a cikin jin daɗin zafi ba kamar yadda ake gafartawa ba kamar yadda yake mantawa da baƙin masana'anta ta hanyar ƙwayar sanyi a ɗakin zazzabi. A akasin wannan tsari mai zafi yana kiyaye kayan daga ƙwayar cuta a babban zazzabi, wanda ke haifar da babbar ƙarfin da ƙarfi da ƙarfi da ƙarfi.