Health Glossary - For Everyone

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What is glucose?

Glucose is the simplest forms of all sugars and that which all types of sugars are broken down into. Glucose is a monosaccharide.

The bloodstream carries glucose to every single cell in the body which they use as an energy source. The cells need insulin to unlock them and allow the glucose inside.

The makes its glucose mainly from carbohydrates (other monosaccharides, disaccharides and polysaccharides) as well as from fats and proteins if it really needs to.


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Important glucose facts

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Why glucose is important

Glucose is vital to keep the body running properly. Without glucose the body cannot survive for long (even if it breaks down fats and protein for its energy source).

A problem with glucose metabolism can lead to type 2 diabetes.

There are several blood glucose test that can be done, which test levels of glucose in the blood. This test is normally performed in the morning before any food has been eaten - fasting blood glucose levels. The following table shows blood glucose levels for pre-diabetes and diabetes as well as healthy blood glucose levels:

Fasting Blood Glucose
Normal glucose tolerance (healthy) 70 to 99 mg/dL
(3.9 to 5.5 mmol/L)
Impaired fasting glucose (pre-diabetes) 100 to 125 mg/dL
(5.6 to 6.9 mmol/L)
Diabetes > 126 mg/dL (7.0 mmol/L)



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Last reviewed: 14 January 2007 || Last updated: 21 August 2007


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More information

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NOTE: Mega doses of any type of vitamin, mineral, amino acid or herbal supplement cannot cure illnesses and in fact can be very dangerous and produce toxic side effects and interfere with medicine you are taking. Always ensure you consult your doctor before taking any type of complementary supplements.
Disclaimer: This guide is not intended to be used for diagnostic or prescriptive purposes. For any treatment or diagnosis of illness, please see your doctor.


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