<prompt> After an overnight fasting , GLUTs are reduced in:BrainRBCKidneyAdipose tissues  <response>: Option d : After an overnight fasting , GLUTs are reduced in ADIPOSE TISSUES Insulin stimulated GLUTs channels GLUT-4 opens during the fed state in Skeletal muscles, Cardiac muscles Adipose tissues. So, after an overnight fast, GLUTs are reduced in skeletal muscles, cardiac muscles adipose tissues due to low insulin. GLUTs channels GLUT-1 and 3 open during fasting in Brain, RBC, Kidney Placenta. 