Ngokwezifundo eziningi, ukucindezeleka kwenzeka kubantu besifazane kaningi kunamadoda - ezigamekweni ezi-4 kwezingu-10 uma kuqhathaniswa no-1 kwabayishumi. Okokuqala, lokhu kungenxa yezici zomzimba, kanti okwesibili, ukudla indlala kuvame ukuholela kulokhu.
Umzimba, ocindezelwe ohlakeni lokudla oluqinile, awunalutho olungakukhiqiza i-serotonin, ebizwa ngenye indlela ngokuthi "i-hormone yenjabulo".
Kwabesifazane abacindezelekile, izazi zokudla zincoma ngokuqinile ukubuyekeza imenyu nokungeza ukudla okuqukethe i-amino acid tryptophan ekudleni kwansuku zonke, lapho kuzokwakhiwa khona i-serotonin.
Kuningi le-tryptophan in. Vele, okuqukethwe ikhalori lokudla nakho kudinga ukubhekwa - kungenjalo amafomu "entanta" azoba esinye isizathu sokukhungatheka.