Triglycerides and Disease

Triglycerides are a normal part of the human body that are both produced in the body and consumed as part of a healthy and balanced diet. However, in excess, triglycerides are linked to an increased risk of some serious health conditions, such as cardiovascular disease.

Understanding Triglycerides | Nucleus Health

Triglycerides naturally circulate around the body in the bloodstream in order to reach the cells that require energy. Each molecule must be metabolized into a single glycerol molecule and three fatty acid molecules before they can be absorbed and used as a source of energy.

In excess, triglycerides can be stored in body fat to be drawn upon for energy in times when the individual has not recently eaten a meal, but this can also contribute to hypertriglyceridemia.


Hypertriglyceridemia is a term used to refer to excessive levels of triglycerides in the body, such that they become a threat to health.

Triglycerides are usually measured as a concentration from a blood sample, which is recorded in mmol/L. There are four different categories of triglyceride levels that correspond to the concentration in the blood and the risk of other health conditions. These concentrations are classified as:

  • Normal: less than 1.7 mmol/L
  • Borderline high: 1.7 – 2 mmol/L
  • High: 2 – 6 mmol/L
  • Very high: more than 6 mmol/L

Blood tests to measure triglycerides

A simple blood test is the most common way to measure the level of triglycerides in the body. A sample of blood is usually taken from the vein in the elbow or the back of the hand, which is sent to a laboratory to measure the content of triglycerides.

As consumption of food prior to the blood sample being drawn can affect the level of triglycerides in the blood, the patient should be advised to fast for 12 hours prior. This helps to lessen variation in the triglyceride level, such as after eating a meal particularly high in fat.

In some cases, several tests on separate occasions may be required to accurately determine the level of triglycerides. This helps to normalize results and is usually called for if the initial result is contrary to what was expected or if the results are particularly worrying.

Risk of cardiovascular disease

Raised triglyceride levels are widely accepted to be linked to an increased risk of cardiovascular disease and are the primary reason that triglycerides are a serious concern.

The association between triglycerides and cardiovascular disease is thought to be due to the ability of triglycerides to lower the level of HDL (good) cholesterol, which creates ideal conditions for the formation of atherosclerotic plaques. As a result, narrowing of the blood vessels can occur and there is an associated increased risk of clot formation.

Management of high triglycerides

Patients with borderline high, high, or very high triglyceride levels should be advised to make necessary lifestyle changes in order to decrease the risk of related health conditions.

Lifestyle recommendations may include:

  • Diet: Eat less and avoid foods that are high in fat and sugar. Opting for foods that are rich in fiber is preferable.
  • Exercise: Keep active and aim for at least 30 minutes of physical activity each day.
  • Lifestyle: Moderate alcohol intake and quit smoking if possible. If there are concurrent health conditions, adequate management of these should be sought.

In some cases, lifestyle changes alone are not enough to manage high triglyceride levels and pharmacological management may be beneficial. However, even when medications are prescribed it is important that patients are aware of the benefits of lifestyle changes, and these are not disregarded.


Further Reading

Last Updated: Apr 9, 2021

Yolanda Smith

Written by

Yolanda Smith

Yolanda graduated with a Bachelor of Pharmacy at the University of South Australia and has experience working in both Australia and Italy. She is passionate about how medicine, diet and lifestyle affect our health and enjoys helping people understand this. In her spare time she loves to explore the world and learn about new cultures and languages.


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