Over 126 is diabetes but even diabetics if they had high blood sure in the 1 sitting 160 to 190 it may not protect the brain. gregg: so perhaps the acceptable level for your hard and kidney and eyes is not good for your brain. guest: good point. maybe people that are diabetic should have tighter control. what is interesting, when they looked at nondiabetics, what they found there was 10 percent or 20 percent increase if the mood sugar was over 100. in the range of up to 120 that is considered not really diabetes but prediabetic and you are not using your glucose ....