Masana kimiyyar Amurka sun gudanar da wani gwaji inda mata 420 masu kiba suka shiga. An ba wa matan don yin shirin rage kiba. Mahalarta gwajin makonni 20 sun kasu kashi biyu: a daya, mata sun ci abincin rana har zuwa karfe uku na rana, kuma a cikin sauran bayan.
A yayin da aka lura, an gano cewa mata daga rukunin farko sun yi saurin rage kiba fiye da waɗanda suka ci a wani lokaci. Af, a cikin waɗancan matan da ke cikin rukuni na biyu, likitoci sun sami raguwar hankali ga insulin, wanda ke cike da haɓakar ciwon sukari mellitus.
Dangane da sakamakon wannan binciken, masana kimiyya sun ba da shawarar: a lokacin abincin rana, cinye kusan 40% na adadin kuzari daga abincin yau da kullun, kuma kuyi hakan ba a baya fiye da karfe uku na rana ba.