M'zaka zaposachedwa, kusala kudya kwakhala kokondedwa kwatsopano kwa gulu la asayansi, kusala kudya kwawonetsedwa kuti kumachepetsa thupi ndikukulitsa moyo wa nyama, makamaka, kafukufuku wochulukirapo akuwonetsa kuti kusala kumakhala ndi zabwino zambiri paumoyo, kukonza thanzi la kagayidwe kachakudya, kupewa kapena kuchedwetsa matenda omwe amabwera ndi ukalamba, komanso kuchepetsa kukula kwa zotupa.
Kusala kudya kwapang'onopang'ono, monga kuletsa kwa caloric, kwawonetsedwa kuti kumakulitsa moyo ndi moyo wathanzi wa nyama zachitsanzo monga yisiti, nematodes, ntchentche za zipatso, ndi mbewa.