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Real members of DiabetesTeam have posted questions and answers that support our community guidelines, and should not be taken as medical advice. Looking for the latest medically reviewed content by doctors and experts? Visit our resource section.

On waking, is a FBG reading, better to be in the 4’s or low 5’s

A DiabetesTeam Member asked a question 💭
Durban, ZA
February 11
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Answer Summary

Members shared their perspectives on ideal fasting blood glucose levels upon waking, with a strong consensus that readings in the 4s to low 5s... Read more

Members shared their perspectives on ideal fasting blood glucose levels upon waking, with a strong consensus that readings in the 4s to low 5s mmol/L are healthy and desirable for both diabetics and prediabetics. Several members offered detailed guidance explaining that while anything under 5.6 mmol/L is technically normal, the 3.9 to 5.4 range is considered optimal for metabolic health, with some noting that occasional mid-5s readings due to the dawn phenomenon are nothing to worry about. A recurring theme was the importance of focusing on long-term trends rather than daily fluctuations, considering factors like sleep quality, stress, and the previous night's meal when interpreting morning numbers.

DiabetesTeam

Is a fasting blood glucose reading better in the 4's or low 5's when you wake up?

A normal fasting blood glucose level is between 70 and 99 mg/dL (or roughly 3.9 to 5.5 mmol/L). Both readings in the 4's and low 5's (in mmol/L) fall within the healthy range for fasting blood sugar.

If you're referring to mmol/L Show Full Answer

Is a fasting blood glucose reading better in the 4's or low 5's when you wake up?

A normal fasting blood glucose level is between 70 and 99 mg/dL (or roughly 3.9 to 5.5 mmol/L). Both readings in the 4's and low 5's (in mmol/L) fall within the healthy range for fasting blood sugar.

If you're referring to mmol/L measurements:
- Readings in the 4's (4.0-4.9 mmol/L) are perfectly normal
- Low 5's (5.0-5.5 mmol/L) are also within the normal range

The key is staying above 3.9 mmol/L (70 mg/dL) to avoid hypoglycemia and below 5.6 mmol/L (100 mg/dL) to maintain healthy glucose control.

Your specific target may vary based on your diabetes management plan. If you're consistently waking with readings outside your target range or experiencing symptoms like night sweats or restless sleep, it's worth discussing with your doctor. They can help determine if your medication timing or dosing needs adjustment.

February 11
A DiabetesTeam Member

For prediabetics 4s are common. Our middle son- nondiabetic, ranges from 3.7 to 5.2.

When I was doing good I occasionally had numbers in the 4s, but 5s were more common.

February 11
A DiabetesTeam Member

I am T2 and my fasting blood glucose first thing in the morning is in the range 4.8 to 5.4 mmol/l.

February 11
A DiabetesTeam Member

@A DiabetesTeam Member

Thank you dear Elizabeth. That makes perfect sense 💕

February 12
A DiabetesTeam Member

@A DiabetesTeam Member Yes l personally think so because all what you ate during the day is a result for what you achieved for good performances/bad. The following day BS of 4 -6 is good, 7 is average anything above you've failed. So watch it out

February 12 (edited)

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