C4 (COMPLEMENT-4)

The C4 (Complement‑4) test measures the serum level of complement component 4, a key protein in the classical complement pathway that helps identify complement activation or inherited deficiency—findings that can be relevant to autoimmune disease and susceptibility to certain infections. Touch Connect provides certified at‑home venous blood collection across Dubai with prompt laboratory analysis and secure electronic reports compatible with UAE clinical practice. This test is often used when clinicians suspect conditions such as systemic lupus erythematosus, vasculitis, recurrent angioedema or unexplained inflammatory syndromes, and results should be reviewed with your physician for accurate interpretation and next‑step care.

• C4 (Complement Component 4)
• Specimen: Serum (venous blood)
• Units: mg/dL
• Reference range (adult): 10–40 mg/dL

• Quantitative serum C4 measurement from venous blood to evaluate classical complement pathway activity
• Helpful screening for autoimmune activity (e.g., SLE) and for suspected hereditary angioedema with low C4 levels
• Home phlebotomy across Dubai and the UAE by certified technicians with samples sent to accredited UAE laboratories
• Rapid electronic results and brief clinical interpretation, typically available within 24–48 hours
• No fasting required; suitable for baseline assessment or monitoring treatment and disease activity

• Quantitative C4 complement level measurement to assess classical complement pathway activity
• Helps identify low C4 linked to autoimmune conditions (such as SLE) and hereditary angioedema risk
• Useful for monitoring disease activity and response to immunosuppressive or biologic therapies
• Convenient home blood collection across Dubai/UAE by certified phlebotomists with rapid transport
• Fast, secure electronic results from accredited UAE labs with lab interpretation and optional clinician follow‑up

• Home venous blood collection by certified phlebotomists across Dubai/UAE (serum sample)
• Quantitative C4 measurement to evaluate classical complement pathway activity, complement deficiency, and autoimmune risk
• No fasting required; suitable for diagnostic assessment or routine monitoring of conditions such as SLE, recurrent infections, or immune dysregulation
• Fast laboratory turnaround (typically 24–48 hours) with electronic report including numeric result, reference range and clinical notes