This is an optional blood test that checks for folate receptor autoantibodies—proteins that can block folate from entering the brain. These antibodies are sometimes found in individuals with autism, developmental delays, or speech/language challenges. In such cases, folinic acid (leucovorin) treatment may be especially helpful.
However, this test is not required to begin treatment. We often prescribe leucovorin based on clinical symptoms alone.
⚠️ Things to Know Before You Decide:
- Positive test → May support the decision to start leucovorin
- Negative test → Does not rule out the possibility of benefit
- Result turnaround: About 2–3 weeks from the time the sample is mailed back
- Cost: ~$295 flat fee (includes return shipping; typically not covered by insurance)
- Our clinical practice: Most children we treat don’t get this test, as it rarely changes the treatment plan and can delay care
You might consider testing if:
- You prefer lab confirmation before starting treatment
- Your child has significant developmental delays or autistic traits
- You're comfortable navigating the extra logistics and cost
We’ll mail the FRAT kit directly to your home.
You’ll need to arrange a local blood draw. Most Quest and Labcorp locations do not offer this service, so be sure to confirm in advance. The lab may charge a separate fee for the blood draw.
You can share these official blood draw instructions with your chosen lab.
Need help finding a nearby lab? Contact FRATNow at info@fratnow.com or (610) 441-9050.
⚠️ Blood draws can be challenging for some individuals, especially those with sensory sensitivities.