A na-akwalite mmanụ aki oyibo dị ka nri dị mma. Anyị maara na ọ nwere polyunsaturated fatty acids dị mkpa nke ahụ mmadụ anaghị emepụta ya. Ya bụ, ha nwere ike nweta naanị site n'èzí. Mmanụ aki oyibo na-adịghị edozi ya bụ isi iyi nke acid fatty bara uru, gụnyere lauric, oleic, stearic, caprylic, na ọtụtụ ndị ọzọ. Mgbe ọ na-ekpo ọkụ, ọ naghị emepụta carcinogens, na-ejigide vitamin na amino acid niile bara uru, nke na-enye ohere iji ya mee ihe n'ọtụtụ ebe na nri.
Otú ọ dị, ndị ọkà mmụta sayensị America na-adụ ọdụ ka ha hapụ iji mmanụ aki oyibo dị ka ihe analog na mmanụ oriri ndị ọzọ na abụba anụmanụ. Ọ tụgharịrị na ọ nwere ihe fọrọ nke nta ka ọ bụrụ okpukpu isii karịa abụba juru eju karịa mmanụ oliv. N'aka nke ọzọ, a na-ewere abụba juru eju dị ka adịghị mma n'ihi na ha nwere ike ịkwalite ọkwa cholesterol ọjọọ, na-abawanye ohere nke ọrịa obi.
Dị ka otu akụkọ bipụtara, mmanụ aki oyibo nwere 82% juputara abụba, ebe mmanu abuba nwere 39%, abụba anụ nwere 50%, na bọta nwere 63%.
Nnyocha e mere na 1950 gosiri njikọ dị n'etiti abụba juru eju na LDL cholesterol (nke a na-akpọ "cholesterol" ọjọọ). Ọ nwere ike ibute mkpụkọ ọbara wee bute ọrịa obi na ọrịa strok.
HDL-cholesterol, n'aka nke ọzọ, na-echebe megide ọrịa obi. Ọ na-amịkọrọ cholesterol ma bughachi ya na imeju, nke na-ewepụ ya n'ahụ. Inwe oke cholesterol "ezigbo" nwere mmetụta dị iche.
AHA na-atụ aro iji dochie nri ndị nwere abụba juru eju, gụnyere anụ uhie, nri e ghere eghe, na, Ewoo, mmanụ aki oyibo, na isi iyi nke abụba na-enweghị afọ ojuju dị ka mkpụrụ, mkpo, ube oyibo, mmanụ ihe oriri na-abụghị ebe okpomọkụ (olive, flaxseed, na ndị ọzọ) .
Dị ka Health Health England si kwuo, nwoke toro eto ekwesịghị iri ihe karịrị gram 30 nke abụba juru eju kwa ụbọchị, nwanyị ekwesịghịkwa ịfe gram 20. AHA na-atụ aro ibelata abụba juputara na 5-6% nke calorie mkpokọta, nke bụ ihe dịka gram 13 maka nri calorie 2000 kwa ụbọchị.