Monga momwe asayansi amakhalira, gramu imodzi ya mafuta pamene imadulidwa m'thupi kupita kumagetsi otsiriza (madzi ndi carbon dioxide) imapatsa mphamvu moĊµirikiza kuposa kuchuluka kwa mapuloteni kapena chakudya. Koma osataya mafuta onse a zamasamba ndi zinyama kuchokera ku zakudya zawo akadalibe phindu. Zoona zake n'zakuti, pamene kudya zakudya zokhudzana ndi mafuta, thupi lathu limalandira mafuta monga cholesterol. Inde, cholesterol womwewo, womwe umakhala wochuluka kwambiri umakhudza thanzi lathu, ndipo koposa zonse zimasokoneza ntchito ya mtima wamtima. Koma musaiwale kuti cholesterol chomwecho ndi chimodzi mwa zigawo zikuluzikulu za mafuta amtundu wa thupi m'thupi la munthu. Popanda kutenga nawo gawo, zimakhala zosavuta kuchita zina mwa zinthu zofunika kwambiri m'thupi lathu. Mwachitsanzo, popanda cholesterol, kusakanikirana kwa mahomoni a steroid sizingatheke, ndipo zochitika za matenda oterewa, monga mukudziwira, zimadza ndi zotsatira zoopsa za thupi. Choncho, ngakhale kuti mafuta amtundu wa zakudya ayenera kukhala ochepa, sizingakhale zofunikira kuti aziwachotsera iwo, ngakhale ndi zakudya zolemetsa. Chinthu chokha chimene mungakwanitse ndi kusiya kugwiritsa ntchito mafuta kwa nthawi yaying'ono, mwachitsanzo, nthawi yotchedwa "kutulutsa tsiku", pamene mbale zazikulu pa tebulo lathu ndizochokera ku zamasamba kapena zokolola za lactic acid.
Ponena za mafuta a zamasamba, zokhumba zawo zimakhala zazikulu ngati za mafuta a nyama. Kusiyanitsa maonekedwe a masamba a zinyama mosavuta: Chowonadi ndi chakuti mafuta ambiri a masamba a firiji amatha kutentha, ndipo mafuta a chiweto amachokera - olimba. Koma kusiyana kwakukulu, kofunikira kwambiri pa thanzi lathu, kuli muzosiyana zochitika za thupi za magulu awa a zinthu. Zikuwoneka kuti mafuta a zamasamba ali ndi ma composition awo omwe alibe unsaturated acid acids - linoleic, linolenic ndi arachidonic, zomwe zimathandiza kwambiri kuti tikhalebe ndi thanzi lathu. Ichi ndicho chifukwa cha ulamuliro wa zakudya, malinga ndi momwe thupi lathu liyenera kupereka mafuta oyenera, osati chifukwa chowononga zinyama, koma chifukwa cha zakudya zamtundu wa mafuta. Mwa njira, pakali pano m'mitolo yogula zakudya mafuta ali ndi mawonekedwe osiyana - ndi mpendadzuwa, azitona, soya ndi zina zamasamba. Kuonetsetsa zofunikira za thupi lathu nthawi zonse mu mafutawa osatulutsidwa, ma supuni angapo a mafuta a masamba, omwe timagwiritsa ntchito pokonza saladi zamasamba.
Choncho, kufunikira kwa kukhalapo kwa chakudya chathu cha mafuta a zamasamba ndi zinyama ndizowoneka bwino ndipo kwakhala kwatsimikiziridwa kale pa sayansi. Choncho ngakhale ndi zakudya zolimbitsa thupi kwambiri, musamalepheretsa kudya zakudya zamtundu uliwonse zomwe mumazidya.