Please Wait
{{vm.model.title}}
{{vm.model.overview}}
Recommended Products for You
Complement C4 Blood Test
Item # LC001834
Measures a protein linked to autoimmune diseases when deficient
Complement C4 Blood Test
Item # LC001834
Measures a protein linked to autoimmune diseases when deficient
Check in on your immune system's ability to protect against defense and inflammation by measuring your levels of the component 4 (C4) protein of the immune system’s complement system.
The complement system is a group of proteins that are important in your defense against infection and play a role in the development of inflammation. There are nine major complement proteins called C1 through C9. These various components travel through your blood stream searching for foreign invaders such as bacteria or viruses. When this happens, the complement system is activated and works as a cascading event like the falling of a row of dominoes. Most of the time the outcome of compliment activation is favorable; the "foreign invader" is removed with no damage to cells or tissue. But in some people, the complement system activation becomes uncontrolled or certain components may be deficient causing autoimmune disease or the risk of recurrent mild or serious bacterial infections. This blood test measures component 4 (C4) of the complement system. Deficiency of C4 is closely linked to development of autoimmune diseases such as lupus and rheumatoid arthritis.1 Instructions Fasting is not required. Take all medications as prescribed. Note For those following Dr. Shoemaker’s mold testing, this is testing C4 (ß1E Globulin), NOT C4a. He suggests using specifically Quest labs for C4a. References |
The laboratory services are for informational purposes only. It is not the intention of National Diagnostics, Inc and Life Extension to provide specific medical advice but rather to provide users with information to better understand their health. Specific medical advice including diagnosis and treatment will not be provided. Always seek the advice of a trained health professional for medical advice, diagnosis or treatment.
Both the physician and the testing laboratory are independent contractors with whom National Diagnostics, Inc makes arrangements for your blood tests. Neither National Diagnostics, Inc or Life Extension will be liable for any acts or omissions of the physician, the testing laboratory, or their agents or employees.
A clinician's order is required for many tests. Where applicable, an independent clinician will review your test request and determine whether to authorize the test, if appropriate. For additional information, see PWNHealth Terms of Service.
Life Extension - Why We Do It?
The Best Supplements Science Can Offer
When putting something in your body, you should be confident that you’re getting the nutritional benefits your body deserves. We've been delivering high-quality, science-backed supplements for more than 40 years.
What Matters to You, Matters to Us
We're committed to empowering you to live a healthier life. Whether it’s finding sustainable partners for our ingredients or funding the latest anti-aging research, we're all about your health & wellness.
Highly Recommended
98% of our customers recommend us to family and friends. We're very proud of that because our loved ones matter to us—and we're willing to bet you feel the same way.
Product Transparency
40 years of research dedicated to bringing you premium, scientifically-validated formulations.
Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of Life Extension. We do not verify or endorse any claims made in these reviews.
Related Lab Test
ESR (Sedimentation Rate) Blood Test
Identify chronic inflammation through RBC descent in a test tube
$16.82
