# Source note — leucovorin / folinic acid, cerebral folate deficiency and autism (2026-09-06)

Original YouTube URL: https://youtu.be/kgBBTQlpyAM?is=DyiIIEusp6KSouxV  
Canonical URL: https://www.youtube.com/watch?v=kgBBTQlpyAM  
Channel: Dr. Ben Lynch  
Title: The Brain Folate Problem No One Is Explaining To Parents  
Duration: 1514 seconds  
Video-download status: YouTube metadata, description, thumbnail and captions captured; MP4 download returned HTTP 403, so public YouTube embed is used.

## What the video claims
The video argues that many children with autism/ADHD/learning issues have folate-receptor antibodies blocking folate entry into the brain, that leucovorin/folinic acid can bypass blocked transport, and that parents should remove folic acid/dairy and consider lower-dose folinic acid plus vitamin D/glutathione/homocysteine work.

## Evidence label
There is a real biomedical topic: cerebral folate deficiency, folate receptor alpha autoantibodies and leucovorin/folinic acid have published ASD studies. Best-supported wording: promising treatment signal for a biologically selected subgroup, especially language impairment/FRAA-positive children, but not a universal autism cure and not a parent-run dosing protocol. Some claims in the video go beyond guideline-level evidence, especially blanket anti-folic-acid language, dairy-elimination certainty, low-dose supplement substitution for prescription leucovorin, and claims about medical-school/pharma motives.