126 is high but not too bad. Doctors are all different. At one time they thought anything under 200 was not good, but not harmful . Now they have lowered that to 120 or 150. 110 is definitely not harmful, but slightly high. 74 is good . 80 is good, 85 is good. If it is 60 you had better eat some candy, somewhere below there you will pass out. Generally high, you won't pass out, but you will have aches and pains because the excess sugar is getting into your muscles and causing long term damage to your heart, Kidneys, maybe liver, blood vessles in your extremeties. I have had 490' s twice in my life and that is very harmful for any length of time. I have lost some feeling in my feet, because of that. It is permanent. If I would have let it go on, would have lost total feeling, any foot injury would have gone unnoticed, gangarene then amputation would be the final result. Since the other organs are being damaged also at this level, eventually death. To be really safe, keep it under 110 and over 70