What is a dangerous glucose level?

Blood sugar that is below 70 or above 300 is dangerous, and immediate medial help should be sought, states University of Washington's Women's Health. If blood sugar is below 90 or above 160, effort should be made to maintain safer blood sugar levels.

If blood sugar levels are too high or consistently higher than the normal range, blood sugar can be regulated and maintained through the use of medications, diet, and regular exercise, says University of Washington's Women's Health. It is important to regulate carbohydrate consumption and reduce unhealthy fats to maintain healthy blood sugar levels. If blood sugar raises above 300, consult a medical professional as soon as possible.