Masana kimiyya daga Jami'ar Cornell (Amurka) da Tampere University of Technology (Finland) ne suka tabbatar da hakan. Domin tsawon shekara guda, an yi nazarin bayanai game da canje-canje a cikin nauyin jikin kusan 3000 mazauna kasashe uku - Amurka, Jamus da Japan.
A cikin waɗannan ƙasashe, bukukuwa masu tsawo kamar na sabuwar shekara (sabili da haka bukukuwan da suka fi yawa) suna faruwa a lokuta daban-daban. A cikin Jihohi, godiya ce, wanda ke faɗuwa a ƙarshen Nuwamba, da kuma Kirsimeti. Jamusawa na gudanar da bukukuwan Kirsimeti da na Easter. Kuma manyan bukukuwan Jafananci sun faɗi a cikin bazara, to, taron mafi tsayi a teburin yana faruwa.
Tabbas, a kan hutu mai tsawo ne kowa ya ci daga zuciya, babu wanda ya ƙidaya adadin kuzari, wanda ke nufin cewa yawan nauyin nauyin shekara shine iyakar - daga 0,6% zuwa 0,8%. Bayan bukukuwan, kamar yadda kuri'u ya nuna, yawancin suna ci gaba da cin abinci, kuma yana ɗaukar kimanin watanni shida ko kaɗan don rage nauyi. Idan aka kwatanta canjin nauyi da watanni, masana kimiyya sun gano cewa a tsakiyar kaka ne waɗanda suke son rage kiba su sami mafi kyawun surar su. Domin fara murmurewa a zahiri cikin wata guda…