Lokhu kufakazelwe ososayensi abavela eCornell University (USA) naseTampere University of Technology (Finland). Unyaka wonke, kube nokuhlaziywa kwedatha ekushintsheni kwesisindo somzimba sabahlali abangaba ngu-3000 bamazwe amathathu - i-United States, iJalimane neJapan.
Kula mazwe, amaholide amade njengamaholide wethu kaNcibijane (futhi ngenxa yalokho amadili amaningi kakhulu) enzeka ngezikhathi ezahlukahlukene. E-States, yi-Thanksgiving, ewela ekupheleni kukaNovemba, kanye noKhisimusi. AmaJalimane agubha amadili kaKhisimusi nawama-Easter. Futhi amaholide amakhulu aseJapan awela entwasahlobo, bese kuba nemibuthano emide kakhulu etafuleni.
Vele, kungamaholide amade lapho wonke umuntu adla khona ngokusuka enhliziyweni, akekho obala ama-calories, okusho ukuthi inzuzo yesisindo yonyaka iphezulu - isuka ku-0,6% iye ku-0,8%. Ngemuva kwamaholide, njengoba kuvotelwe ukukhombisa, iningi liya ekudleni, futhi kuthatha cishe izinyanga eziyisithupha noma ngaphezulu ukuncipha. Ngokuqhathanisa ukushintshashintsha kwesisindo ngezinyanga, ososayensi bathole ukuthi kuphakathi nekwindla lapho labo abafuna ukunciphisa isisindo bathola isimo sabo esihle kakhulu. Ukuze uqale ukuthola kabusha ngokoqobo enyangeni…