What Is the FRAT Test Kit? Understanding Folate Receptor Autoantibody Testing
The FRAT Test Kit (short for Folate Receptor Autoantibody Test) is a specialised blood test that detects autoantibodies against the Folate Receptor Alpha (FRa) protein. This protein is responsible for transporting folate (Vitamin B9) across the blood-brain barrier and into the brain. When autoantibodies attack this receptor, folate cannot reach the brain in adequate amounts, even when blood folate levels appear normal.
This condition, known as Cerebral Folate Deficiency (CFD), has been linked to Autism Spectrum Disorder (ASD), speech and language delays, seizures, cognitive impairment, and other neurodevelopmental disorders. Research published in peer-reviewed journals indicates that up to 70-75% of children with ASD may have detectable Folate Receptor Autoantibodies (FRAbs).
At Altus Lab Chandigarh, we now offer the FRAT Test Kit service pan-India with free home blood collection at your doorstep, temperature-controlled courier logistics, and reports delivered within 48 hours of sample receipt at our NABL-accredited laboratory.
Why the FRAT Test Matters – The Science Behind It
Folate is a critical nutrient for brain development, neurotransmitter synthesis, and neuroprotection. In most people, the Folate Receptor Alpha (FRa) on the surface of cells actively transports folate across the blood-brain barrier into the cerebrospinal fluid (CSF). When the immune system mistakenly produces autoantibodies against this receptor, two things happen:
- Blocking autoantibodies – directly block folate from binding to the receptor, preventing transport into the brain
- Binding autoantibodies – attach to the receptor and alter its position, indirectly reducing folate uptake
Result: Brain folate deficiency even with normal serum folate levels
Consequence: Impaired brain development, communication difficulties, behavioural issues, and seizures
Treatment possibility: Folinic acid (Leucovorin) – an alternate folate form that can bypass the blocked receptor
Outcome: Early detection means earlier intervention and potentially significant improvement
Who Should Get the FRAT Test Done?
The FRAT Test is clinically relevant for the following individuals:
- Children diagnosed with Autism Spectrum Disorder (ASD) or showing ASD-related symptoms
- Children with speech and language delays or regression
- Children experiencing unexplained seizures or epilepsy
- Children with cognitive impairment – difficulties in learning, attention, memory
- Children with abnormal or repetitive movements (tics, dystonia)
- Children with persistent behavioural issues – aggression, impulsivity, anxiety
- Children with neurological symptoms of unknown cause that haven’t responded to standard treatment
- Pregnant women with a history of neural tube defect pregnancies or recurrent pregnancy complications
- Individuals with schizophrenia, depression, or anxiety with suspected folate transport issues
If your child has already been diagnosed with ASD and your doctor is considering Leucovorin (folinic acid) therapy, the FRAT Test is an essential first step to confirm the presence of autoantibodies and personalise the dosage.
How Altus Lab Delivers the FRAT Test Kit Across Pan India
Getting the FRAT Test done used to mean travelling to a specialised diagnostic centre. Altus Lab has changed that. Our pan-India home collection and courier service brings this advanced test to your doorstep, wherever you are in India.
Here is exactly how the process works:
- Step 1 – Book Online or Call: Contact Altus Lab via phone, WhatsApp, or the booking form. Share your city, address, and preferred time slot.
- Step 2 – Home Collection: Our trained phlebotomist visits your home at the scheduled time and draws a small blood sample (approx. 3-5 ml serum). No fasting required.
- Step 3 – Temperature-Controlled Courier: The sample is packed in a temperature-stable kit and dispatched to our lab in Chandigarh via courier. Transit time varies by city (typically 24-72 hours).
- Step 4 – Lab Processing: On receiving the sample at our NABL-accredited lab in Chandigarh, our pathology team processes the FRAT assay under the supervision of Dr. Alok Gupta (MD Pathology, Ex-PGIMER).
- Step 5 – Reports in 48 Hours: You receive your detailed FRAT Test report within 48 hours of sample receipt – delivered via email and WhatsApp.
- Step 6 – Doctor Consultation: Share the report with your neurologist, developmental paediatrician, or psychiatrist to plan the next steps.
Why Choose Altus Lab for Your FRAT Test Kit?
- Trusted Since 2013 – Over a decade of diagnostic excellence in Chandigarh
- NABL Accredited & PGI-Accepted Reports – Recognised by top hospitals across the tricity
- Pan-India Reach – Home collection available across all major cities and towns in India
- Expert Supervision – All tests supervised by Dr. Alok Gupta, MD Pathology, Ex-PGIMER
- 48-Hour Report Turnaround – From sample receipt to results, within two working days
- Temperature-Controlled Logistics – Samples handled with clinical-grade care during transit
- Digital Reports – Delivered via email and WhatsApp in PDF format
- Affordable Pricing – Transparent pricing with no hidden charges
- SBI Empanelled Since 2014 – Trusted by government and private institutions
FRAT Test Panel – What Does It Measure?
| Test Component | What It Detects | Clinical Significance |
|---|---|---|
| Blocking Folate Receptor Autoantibody | Autoantibodies that directly block folate binding to FRa receptor | Positive result indicates folate cannot enter the brain via the primary receptor pathway |
| Binding Folate Receptor Autoantibody | Autoantibodies that alter receptor position, reducing folate uptake indirectly | Positive result confirms immune-mediated folate transport disruption |
A positive result on either or both components suggests that your child’s brain may not be receiving adequate folate, even if blood folate levels are normal. Your doctor may then recommend a trial of folinic acid (Leucovorin) therapy, which uses an alternate folate form that bypasses the autoantibody blockade.
FRAT Test vs. Standard Folate Blood Test – Key Difference
| Parameter | Standard Serum Folate Test | FRAT Test (Folate Receptor Autoantibody) |
|---|---|---|
| What it measures | Amount of folate in the blood | Autoantibodies blocking folate transport to the brain |
| Can detect brain folate deficiency? | No – blood folate may be normal even when brain is deficient | Yes – specifically identifies transport blockade |
| Relevant for ASD? | Not specifically | Yes – up to 75% of ASD children may test positive |
| Guides treatment? | No | Yes – positive result supports folinic acid (Leucovorin) therapy |
| Sample required | Blood (serum) | Blood (serum) – no fasting required |
Frequently Asked Questions – FRAT Test Kit India
What is the FRAT Test Kit?
The FRAT (Folate Receptor Autoantibody Test) Kit is a blood test that detects autoantibodies against the folate receptor alpha (FRa). These autoantibodies block folate from crossing the blood-brain barrier, a condition linked to Autism Spectrum Disorder and Cerebral Folate Deficiency.
How does Altus Lab provide the FRAT Test Kit across India?
Altus Lab sends a trained phlebotomist to your home anywhere in India to collect the blood sample. The sample is then couriered to our NABL-accredited lab in Chandigarh. Reports are delivered within 48 hours of sample receipt via email and WhatsApp – no need to travel to a diagnostic centre.
Who should get the FRAT Test done?
Children with Autism Spectrum Disorder, speech delays, cognitive impairment, seizures, repetitive behaviours, or unexplained neurological symptoms are the primary candidates. It is also recommended for pregnant women with a history of neural tube defect pregnancies.
What is the turnaround time for FRAT Test results?
Reports are delivered within 48 hours of our lab receiving the couriered sample. Total time from your home collection to report delivery also depends on courier transit from your city to Chandigarh – typically 24-72 hours transit, plus 48 hours processing.
Is any special preparation required before the FRAT Test blood draw?
No fasting is required. A small blood sample (approximately 3-5 ml serum) is drawn by our trained phlebotomist at your home and shipped in a temperature-controlled kit.
What conditions can the FRAT Test help diagnose?
The FRAT Test helps diagnose Cerebral Folate Deficiency (CFD), supports the investigation of Autism Spectrum Disorder, and screens for Folate Receptor Autoantibodies linked to neural tube defects, schizophrenia, and other neurodevelopmental conditions.