What happens after I get my results?

You'll receive detailed doctor notes in simple language explaining what your complement C4c levels mean for your immune system health and inflammation. These notes include personalized recommendations like lifestyle modifications, when to follow up with a rheumatologist or immunologist, and what other tests might be helpful. You'll also get the standard lab report and can track your C4c levels over time using our trends feature to monitor disease activity or treatment response.

When will I get my results?

Most complement C4c test results are available within 2-4 business days after your blood sample reaches the laboratory. You'll receive an email notification as soon as your results are ready to view in your secure online account. Complex cases or confirmatory testing may occasionally take a bit longer.

Who should consider getting this test?

This test is important for people showing signs of autoimmune disease like persistent joint pain, unexplained rashes, chronic fatigue, or recurring fevers. It's especially valuable if you have a family history of lupus or other autoimmune conditions, if your doctor suspects kidney inflammation, or if you're already diagnosed with an autoimmune disease and need monitoring. Anyone with unexplained chronic inflammation should also consider this test.

What symptoms indicate I may need this test?

Common symptoms that suggest you might need complement testing include persistent fatigue that doesn't improve with rest, unexplained joint pain or swelling, skin rashes (especially a butterfly-shaped rash across the cheeks), recurring fevers, and sensitivity to sunlight. Other signs include frequent infections, unexplained swelling in the legs or around the eyes, and blood in your urine. If you have multiple symptoms affecting different body systems, complement testing can help identify underlying autoimmune issues.

How can I naturally support my immune system health?

Supporting immune system balance involves getting adequate sleep (7-9 hours nightly), managing stress through meditation or gentle yoga, and eating an anti-inflammatory diet rich in omega-3 fatty acids, colorful vegetables, and fruits. Avoid excessive sun exposure if you have lupus or suspected autoimmune disease, and stay hydrated. Regular gentle exercise can help, but avoid overexertion during flare-ups. Limiting processed foods, reducing alcohol consumption, and avoiding smoking can also support immune system regulation.

What is Complement Component C4c and why does it matter?

Complement Component C4c is a protein that's part of your body's complement system, which helps your immune system destroy harmful bacteria and clear out immune complexes (clusters of antibodies and antigens). When C4c levels are low, it often indicates your immune system is overactive and consuming these proteins faster than your body can make them, which happens in autoimmune diseases like lupus. Monitoring C4c levels helps doctors assess disease activity and treatment effectiveness.

What does low Complement C4c mean?

Low C4c levels typically indicate active autoimmune disease, most commonly systemic lupus erythematosus (SLE), but can also suggest kidney inflammation (glomerulonephritis), immune complex diseases, or hereditary complement deficiency. When your immune system is attacking your own tissues, it uses up complement proteins faster than normal, causing levels to drop. Low C4c can also occur during lupus flares or active kidney disease, making it a useful marker for monitoring disease activity and treatment response.