Type

Type

Blood

Blood

Part of

Heart health

Part of

Heart health

Blood biomarker

Apolipoprotein CII

Apolipoprotein CII

Apolipoprotein CII is a protein found in large fat particles and is involved in the metabolism of triglycerides.

Apolipoprotein CII is a protein found in large fat particles and is involved in the metabolism of triglycerides.

Apolipoprotein CII

Normal range

Normal range

1.6-4.2 mg/dL

1.6-4.2 mg/dL

Normal range

1.6-4.2 mg/dL

1.6-4.2 mg/dL

Normal range

Apolipoprotein CII

Apolipoprotein CII

Apolipoprotein CII is a protein found in large fat particles and is involved in the metabolism of triglycerides.

Apolipoprotein CII

Normal range

1.6-4.2 mg/dL

Normal range

1.6-4.2 mg/dL

1.6-4.2 mg/dL

Normal range

Apolipoprotein CII

Apolipoprotein CII

Apolipoprotein CII is a protein found in large fat particles and is involved in the metabolism of triglycerides.

Apolipoprotein CII

Normal range

1.6-4.2 mg/dL

Normal range

1.6-4.2 mg/dL

1.6-4.2 mg/dL

Normal range

Apolipoprotein CII

Dr. Yiannis Balanos

MBBS MRCGP

The Fat Processing Activator

The Fat Processing Activator

Apolipoprotein CII (ApoCII) is a specialised protein that acts as a crucial activator in your body's fat processing system. Think of it as the key that unlocks your body's ability to break down triglycerides in your bloodstream. ApoCII activates an enzyme called lipoprotein lipase, which is responsible for breaking down fat particles so your tissues can use them for energy.

Without adequate ApoCII, your body struggles to process dietary fats and clear triglycerides from your blood effectively. This relatively small but mighty protein plays an important role in maintaining healthy lipid metabolism and preventing very high cholesterol buildup.

Apolipoprotein CII (ApoCII) is a specialised protein that acts as a crucial activator in your body's fat processing system. Think of it as the key that unlocks your body's ability to break down triglycerides in your bloodstream. ApoCII activates an enzyme called lipoprotein lipase, which is responsible for breaking down fat particles so your tissues can use them for energy.

Without adequate ApoCII, your body struggles to process dietary fats and clear triglycerides from your blood effectively. This relatively small but mighty protein plays an important role in maintaining healthy lipid metabolism and preventing very high cholesterol buildup.

When ApoCII Levels Fall Out of Balance

When ApoCII Levels Fall Out of Balance

When ApoCII Levels Fall Out of Balance

Discover why both deficient and elevated ApoCII levels disrupt fat metabolism and increase cardiovascular risks.

Read more

What Influences Your ApoCII Levels?

What Influences Your ApoCII Levels?

What Influences Your ApoCII Levels?

Learn about the genetic, metabolic, and medical factors that affect your body's production and function of this critical fat-processing protein.

Read more

Managing ApoCII Abnormalities

Managing ApoCII Abnormalities

Managing ApoCII Abnormalities

Understand the specialised approaches required for both ApoCII deficiency and excess, including dietary modifications and medical interventions.

Read more

Understanding Your Results

Understanding Your Results

Understanding Your Results

Find out what your levels mean, when testing is warranted, and how results guide treatment decisions.

Read more

When ApoCII Levels Fall Out of Balance

When ApoCII Levels Are Normal: Normal ApoCII levels ensure your body can efficiently activate lipoprotein lipase, the enzyme responsible for breaking down triglyceride-rich particles. This allows tissues to absorb fatty acids for energy whilst maintaining healthy triglyceride clearance from your bloodstream.

At optimal levels, ApoCII supports proper fat metabolism, preventing the accumulation of triglyceride-rich particles that can contribute to cardiovascular disease.

When ApoCII Levels Drop Too Low: Significantly low ApoCII levels can severely impair your body's ability to process fats, leading to triglyceride accumulation. Borderline low levels are unlikely to be clinically significant.

A rare condition, known as ApoCII deficiency, can cause triglyceride levels to reach extremely high levels—sometimes exceeding normal ranges by 10-fold or more– and is linked to risk of pancreatitis. ApoCII deficiency is primarily genetic, caused by mutations in the APOC2 gene, though acquired deficiency can occur with severe malnutrition, advanced liver disease, or certain medications. The condition affects approximately 1 in 1,000,000 individuals and often presents in childhood or early adulthood.

When ApoCII Levels Climb Too High: Significantly elevated ApoCII levels are less common but can indicate underlying metabolic disturbances. High levels may be associated with insulin resistance, diabetes, or other conditions that affect fat metabolism.

While high ApoCII doesn't directly cause the same acute risks as low levels, it can signal that your body is struggling with fat processing efficiency. This may contribute to cardiovascular risk when combined with other metabolic abnormalities.

When ApoCII Levels Fall Out of Balance

When ApoCII Levels Are Normal: Normal ApoCII levels ensure your body can efficiently activate lipoprotein lipase, the enzyme responsible for breaking down triglyceride-rich particles. This allows tissues to absorb fatty acids for energy whilst maintaining healthy triglyceride clearance from your bloodstream.

At optimal levels, ApoCII supports proper fat metabolism, preventing the accumulation of triglyceride-rich particles that can contribute to cardiovascular disease.

When ApoCII Levels Drop Too Low: Significantly low ApoCII levels can severely impair your body's ability to process fats, leading to triglyceride accumulation. Borderline low levels are unlikely to be clinically significant.

A rare condition, known as ApoCII deficiency, can cause triglyceride levels to reach extremely high levels—sometimes exceeding normal ranges by 10-fold or more– and is linked to risk of pancreatitis. ApoCII deficiency is primarily genetic, caused by mutations in the APOC2 gene, though acquired deficiency can occur with severe malnutrition, advanced liver disease, or certain medications. The condition affects approximately 1 in 1,000,000 individuals and often presents in childhood or early adulthood.

When ApoCII Levels Climb Too High: Significantly elevated ApoCII levels are less common but can indicate underlying metabolic disturbances. High levels may be associated with insulin resistance, diabetes, or other conditions that affect fat metabolism.

While high ApoCII doesn't directly cause the same acute risks as low levels, it can signal that your body is struggling with fat processing efficiency. This may contribute to cardiovascular risk when combined with other metabolic abnormalities.

When ApoCII Levels Fall Out of Balance

When ApoCII Levels Are Normal: Normal ApoCII levels ensure your body can efficiently activate lipoprotein lipase, the enzyme responsible for breaking down triglyceride-rich particles. This allows tissues to absorb fatty acids for energy whilst maintaining healthy triglyceride clearance from your bloodstream.

At optimal levels, ApoCII supports proper fat metabolism, preventing the accumulation of triglyceride-rich particles that can contribute to cardiovascular disease.

When ApoCII Levels Drop Too Low: Significantly low ApoCII levels can severely impair your body's ability to process fats, leading to triglyceride accumulation. Borderline low levels are unlikely to be clinically significant.

A rare condition, known as ApoCII deficiency, can cause triglyceride levels to reach extremely high levels—sometimes exceeding normal ranges by 10-fold or more– and is linked to risk of pancreatitis. ApoCII deficiency is primarily genetic, caused by mutations in the APOC2 gene, though acquired deficiency can occur with severe malnutrition, advanced liver disease, or certain medications. The condition affects approximately 1 in 1,000,000 individuals and often presents in childhood or early adulthood.

When ApoCII Levels Climb Too High: Significantly elevated ApoCII levels are less common but can indicate underlying metabolic disturbances. High levels may be associated with insulin resistance, diabetes, or other conditions that affect fat metabolism.

While high ApoCII doesn't directly cause the same acute risks as low levels, it can signal that your body is struggling with fat processing efficiency. This may contribute to cardiovascular risk when combined with other metabolic abnormalities.

What Influences Your ApoCII Levels?

Genetic mutations affecting the APOC2 gene represent the primary cause of severe ApoCII deficiency. Acquired causes include severe malnutrition, advanced liver disease where protein synthesis is impaired, certain medications that affect lipoprotein metabolism, and chronic kidney disease with significant protein loss. Inflammatory conditions can also suppress ApoCII production.

Insulin resistance and diabetes can elevate ApoCII levels through altered lipoprotein metabolism. Obesity and metabolic syndrome create inflammatory states that may increase ApoCII production. Genetics may also predispose individuals to higher ApoCII concentrations.

What Influences Your ApoCII Levels?

Genetic mutations affecting the APOC2 gene represent the primary cause of severe ApoCII deficiency. Acquired causes include severe malnutrition, advanced liver disease where protein synthesis is impaired, certain medications that affect lipoprotein metabolism, and chronic kidney disease with significant protein loss. Inflammatory conditions can also suppress ApoCII production.

Insulin resistance and diabetes can elevate ApoCII levels through altered lipoprotein metabolism. Obesity and metabolic syndrome create inflammatory states that may increase ApoCII production. Genetics may also predispose individuals to higher ApoCII concentrations.

What Influences Your ApoCII Levels?

Genetic mutations affecting the APOC2 gene represent the primary cause of severe ApoCII deficiency. Acquired causes include severe malnutrition, advanced liver disease where protein synthesis is impaired, certain medications that affect lipoprotein metabolism, and chronic kidney disease with significant protein loss. Inflammatory conditions can also suppress ApoCII production.

Insulin resistance and diabetes can elevate ApoCII levels through altered lipoprotein metabolism. Obesity and metabolic syndrome create inflammatory states that may increase ApoCII production. Genetics may also predispose individuals to higher ApoCII concentrations.

Managing ApoCII Abnormalities

For Established ApoCII Deficiency: Management requires specialist care from lipid disorder experts. Dietary intervention often forms the cornerstone of treatment. 

Complete alcohol avoidance is essential, as alcohol can precipitate pancreatitis in susceptible individuals. Fat-soluble vitamin supplementation (vitamins A, D, E, and K) becomes necessary. Patients with ApoCII require regular monitoring.

For Elevated ApoCII: Management focuses on addressing any underlying metabolic disorders. Improving insulin sensitivity through regular physical activity, weight management, and Mediterranean-style dietary patterns can help normalise levels.

Managing ApoCII Abnormalities

For Established ApoCII Deficiency: Management requires specialist care from lipid disorder experts. Dietary intervention often forms the cornerstone of treatment. 

Complete alcohol avoidance is essential, as alcohol can precipitate pancreatitis in susceptible individuals. Fat-soluble vitamin supplementation (vitamins A, D, E, and K) becomes necessary. Patients with ApoCII require regular monitoring.

For Elevated ApoCII: Management focuses on addressing any underlying metabolic disorders. Improving insulin sensitivity through regular physical activity, weight management, and Mediterranean-style dietary patterns can help normalise levels.

Managing ApoCII Abnormalities

For Established ApoCII Deficiency: Management requires specialist care from lipid disorder experts. Dietary intervention often forms the cornerstone of treatment. 

Complete alcohol avoidance is essential, as alcohol can precipitate pancreatitis in susceptible individuals. Fat-soluble vitamin supplementation (vitamins A, D, E, and K) becomes necessary. Patients with ApoCII require regular monitoring.

For Elevated ApoCII: Management focuses on addressing any underlying metabolic disorders. Improving insulin sensitivity through regular physical activity, weight management, and Mediterranean-style dietary patterns can help normalise levels.

Understanding Your Results

ApoCII levels are measured in milligrams per deciliter (mg/dL):


  • Normal: 1.6-4.2 mg/dL


ApoCII testing is typically ordered when standard triglyceride tests show extreme elevations or when genetic fat metabolism disorders are suspected.

Results must be interpreted in the context of a whole cholesterol profile, family history, and clinical presentation. Genetic testing may be recommended for results that are highly out of range.

Understanding Your Results

ApoCII levels are measured in milligrams per deciliter (mg/dL):


  • Normal: 1.6-4.2 mg/dL


ApoCII testing is typically ordered when standard triglyceride tests show extreme elevations or when genetic fat metabolism disorders are suspected.

Results must be interpreted in the context of a whole cholesterol profile, family history, and clinical presentation. Genetic testing may be recommended for results that are highly out of range.

Understanding Your Results

ApoCII levels are measured in milligrams per deciliter (mg/dL):


  • Normal: 1.6-4.2 mg/dL


ApoCII testing is typically ordered when standard triglyceride tests show extreme elevations or when genetic fat metabolism disorders are suspected.

Results must be interpreted in the context of a whole cholesterol profile, family history, and clinical presentation. Genetic testing may be recommended for results that are highly out of range.

The Takeaway

ApoCII may be one of the lesser-known apolipoproteins, but its role in fat metabolism is important. Understanding your ApoCII status provides crucial insights into triglyceride metabolism.

If you have extremely high triglycerides or a family history of severe fat metabolism disorders, ApoCII testing could provide further insights. Early detection of ApoCII abnormalities allows for targeted treatment strategies that can prevent complications.

For most people, supporting healthy ApoCII levels means maintaining good overall metabolic health through proper diet, regular exercise, and weight management. However, if you have genetic ApoCII deficiency, you'll need specialised medical care and strict dietary management to stay healthy.

The Takeaway

ApoCII may be one of the lesser-known apolipoproteins, but its role in fat metabolism is important. Understanding your ApoCII status provides crucial insights into triglyceride metabolism.

If you have extremely high triglycerides or a family history of severe fat metabolism disorders, ApoCII testing could provide further insights. Early detection of ApoCII abnormalities allows for targeted treatment strategies that can prevent complications.

For most people, supporting healthy ApoCII levels means maintaining good overall metabolic health through proper diet, regular exercise, and weight management. However, if you have genetic ApoCII deficiency, you'll need specialised medical care and strict dietary management to stay healthy.

The Takeaway

ApoCII may be one of the lesser-known apolipoproteins, but its role in fat metabolism is important. Understanding your ApoCII status provides crucial insights into triglyceride metabolism.

If you have extremely high triglycerides or a family history of severe fat metabolism disorders, ApoCII testing could provide further insights. Early detection of ApoCII abnormalities allows for targeted treatment strategies that can prevent complications.

For most people, supporting healthy ApoCII levels means maintaining good overall metabolic health through proper diet, regular exercise, and weight management. However, if you have genetic ApoCII deficiency, you'll need specialised medical care and strict dietary management to stay healthy.

References

  1. Hegele, R. A., et al. (2018). Rare dyslipidaemias, from phenotype to genotype to management. The Lancet, 391(10120), 2272-2283.

  2. Brahm, A. J., & Hegele, R. A. (2015). Hypertriglyceridemia. Nutrients, 7(2), 1218-1237.

  3. European Society of Cardiology. (2021). ESC/EAS Guidelines for the management of dyslipidaemias. European Heart Journal, 42(25), 2485-2492.

  4. Chait, A., & Eckel, R. H. (2019). The chylomicronemia syndrome is most often multifactorial. Annals of Internal Medicine, 170(9), 626-634.

References

  1. Hegele, R. A., et al. (2018). Rare dyslipidaemias, from phenotype to genotype to management. The Lancet, 391(10120), 2272-2283.

  2. Brahm, A. J., & Hegele, R. A. (2015). Hypertriglyceridemia. Nutrients, 7(2), 1218-1237.

  3. European Society of Cardiology. (2021). ESC/EAS Guidelines for the management of dyslipidaemias. European Heart Journal, 42(25), 2485-2492.

  4. Chait, A., & Eckel, R. H. (2019). The chylomicronemia syndrome is most often multifactorial. Annals of Internal Medicine, 170(9), 626-634.

References

  1. Hegele, R. A., et al. (2018). Rare dyslipidaemias, from phenotype to genotype to management. The Lancet, 391(10120), 2272-2283.

  2. Brahm, A. J., & Hegele, R. A. (2015). Hypertriglyceridemia. Nutrients, 7(2), 1218-1237.

  3. European Society of Cardiology. (2021). ESC/EAS Guidelines for the management of dyslipidaemias. European Heart Journal, 42(25), 2485-2492.

  4. Chait, A., & Eckel, R. H. (2019). The chylomicronemia syndrome is most often multifactorial. Annals of Internal Medicine, 170(9), 626-634.

Subscribe to our newsletter

© 2025 Emerald Labs Ltd

Subscribe to our newsletter

© 2025 Emerald Labs Ltd

Subscribe to our newsletter

© 2025 Emerald Labs Ltd

Subscribe to our newsletter

© 2025 Emerald Labs Ltd

Subscribe to our newsletter

© 2025 Emerald Labs Ltd