COVID-19 and blood sugar regulation

According to several studies [1], [2] and expert opinions [3]  high blood glucose level affects the optimal functioning of the immune system. This might lead to deadly complications in the Flu and Possibly COVID-19 [4].

The lowest normal blood sugar level is 3.9 mmol/l (70 mg/dL) [6]. suggests the target blood glucose limit throughout the day at a range of 4.4 ± 0.5 mmol/L (79 ± 9 mg/dL).



1. Type 2 Diabetes and its Impact on the Immune System.

Retrieved April 28, 2020 from

2. Case Western Reserve University. (2015, August 6).

High blood sugar of diabetes can cause immune system malfunction, triggering infection: Scientists show how sugar-derived molecules can weaken infection-fighting antimicrobial beta-defensin peptides. ScienceDaily.

Retrieved April 28, 2020 from

3. American Diabetes Association

People with diabetes do face a higher chance of experiencing serious complications from COVID-19.
. . .
This is also caused by above-target blood sugars, and both could contribute to more severe complications.

Retrieved March 30, 2020 from

4. Scientific American.

How Blood Sugar Can Trigger a Deadly Immune Response in the Flu and Possibly COVID-19.

Glucose metabolism plays a key role in the cytokine storm seen in influenza, and the link could have potential implications for novel coronavirus infections.

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