Eijkman enweghị ike ịga n'ihu nyocha ya n'ihi ọrịa, mana ọmụmụ nke enyi ya Adolphe Vorderman gosipụtara njikọ dị n'etiti osikapa a na-egbu maramara na ọrịa ahụ. N'ikpeazụ, e kpebisiri ike na ihe na-efu nke na-akpata Beriberi bụ vitamin B1, thiamine. Chemist Casimir Funk belatara okwu ahụ bụ "vital amine" iji chepụta okwu ọhụrụ, vitamin. Maka onyinye ya na nchọpụta nke vitamin antineuritic, Eijkman nwetara Nobel Prize maka Medicine na 1929, na-ekerịta onyinye ahụ na Sir Frederick Funk Hopkins. Ikekwe n'ụzọ na-ezighi ezi, enwetaghị otuto zuru ezu maka ọrụ ya. Ajụjụ: Gịnị mere onye chepụtara Vitamin?
N'afọ 1929, e nyere ya ihe nrite Nobel maka nkà mmụta ọgwụ.