Complement C4

What's

C4 is an essential part of your body's defense system. It's a protein that belongs to a group of proteins called the complement system, which work together to protect you from harmful bacteria and viruses, and to clean up waste in your body. C4 has a crucial role in turning on this system, as it helps to identify and label invaders for destruction, setting off a series of immune reactions. Think of it as a security guard, spotting and marking potential threats so that other parts of your immune system can take action. This protein is always working, helping to keep your body safe from infection and illness.

If Your Levels Are High

Elevated C4 levels might mean that your body's defense system is working extra hard to protect you. This could be due to various reasons, such as fighting off an infection, dealing with inflammation, or reacting to certain medications like steroids. It's like your body's security team is on high alert, doing their best to keep you safe. Sometimes, this increased activity can be a sign of an autoimmune condition, where your immune system accidentally targets your own cells. Keep in mind that the exact cause can be different for each person, and these are just some possible explanations for higher C4 levels.

Symptoms of High Levels

Symptoms of high levels of C4 may not be directly noticeable, as they can overlap with symptoms of the underlying conditions that cause the increase. These could include fatigue, joint pain, skin rashes, or unexplained fever.

If Your Levels are Low

Low C4 levels might mean that your body's defense system isn't working at its best. This could be due to an ongoing infection, an autoimmune condition like lupus, or a constant state of inflammation where your body is always trying to fight off threats. Some medications, such as corticosteroids, can also cause lower C4 levels. Additionally, your genes might play a role, as some people naturally have less C4 in their system. While a low C4 level doesn't always mean there's an issue, it could suggest that your immune system is under more pressure than usual.

Symptoms of Low Levels

Symptoms of low levels of C4 may not be directly noticeable, as they can overlap with symptoms of the underlying conditions causing the decrease. These could include fatigue, recurrent infections, or symptoms related to specific autoimmune conditions, such as joint pain or skin rashes.

See References

Test for

Complement C4

Complement C4 by Access Labcorp Draw

Serum

This is a single-marker test measuring complement C4.

AutoImmune Analyzer by Access Med Labs

Serum

This test measures antinuclear antibodies and other related markers to help diagnose autoimmune disease. Antinuclear antibodies are present in systemic lupus erythematosus, Sjogren’s Syndrome, scleroderma, mixed connective tissue disease, drug-induced lupus, and rheumatoid arthritis.

Complement C4 by Access Med Labs

Serum

This is a single-marker test measuring complement C4.

M.A.P 3.0 by DHA Laboratory

Whole Blood

Urine

Serum

Plasma

The Mental M.A.P.™️ 3.0 helps elucidate the cause of symptoms from mental health dysfunction. Mental illnesses have a common underlying theme: microglial cell activation and dysfunction, neuroinflammation, and excitotoxicity. Neuroinflammation and excitotoxicity cause neurotransmitter imbalances and damage to neurons. NOTE: DHA Laboratory blood draws must be performed at Labcorp.

Complement Component C3c and C4c by Quest Diagnostics

Serum

Complement Component C3c and C4c - Decreased concentrations of both C3 and C4 suggest activation of the classical pathway, whereas decreased concentration of just C3 suggests activation of the alternative pathway. Both complement factors may be used to monitor activity of patients with systemic lupus erythematosus (SLE) and immune complex-induced vasculitis.

CONTENTS

What is it?

High Levels

Low Levels

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