I'm non diabetic and my morning gluclose was 92.is that normal? during the day it's been as high as 140 and low as 70.. i'm trying to prevent diabete

Numbers are normal: To prevent diabetes exercise regularly + maintain healthy weight. Screening recommendations vary by group, but general consensus is to screen adults with significant risk factors for disease - hypertension / hyperlipidemia - and those with obesity and another risk factor. Those without risk factors should undergo screening every three years or less beginning at age 45.