Originally released in May 2025, this conversation is being re-released as part of a selection of guest interviews from the podcast archive.

Video: https://youtu.be/SjOKEX_KO3A?si=fYsl9tS0sVUAhozL

Dr. Richard Frye, MD, PhD, returns to discuss leucovorin, folate metabolism, and the growing research examining their relationship with autism. Dr. Frye is a child neurologist and autism researcher with extensive work investigating metabolic and physiological differences associated with neurodevelopmental disorders.

We explore why folate is so important to the brain, how folate crosses the blood-brain barrier, cerebral folate deficiency, folate receptor alpha autoantibodies, and the biological mechanisms that led researchers to investigate leucovorin in autism. Dr. Frye also walks through clinical research examining leucovorin and verbal communication, discusses why some individuals may respond differently than others, and explains the connections among folate metabolism, neurotransmitters, methylation, mitochondrial function, and neurodevelopment.

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0:00 Dr. Richard Frye

0:58 Daylight Computer Company

5:17 Chroma Light Devices

8:27 History of Leucovorin; low risk, high reward; Folate Receptor Alpha (FRa)

10:25 Blood Brain Barrier; Folate; CSF (cerebral spinal fluid)

14:04 DNA, RNA; MTHFR (Methylenetetrahydrofolate reductase)

17:34 Cerebral Folate deficiency; BH4, Placenta & Womb

23:35 Folate deficiency & Autism

26:21 Clinical Studies & Data

29:28 Folate & Mitochondria; Cerebral Folate Antibodies; White Matter Findings (!)

34:45 Cerebral Folate deficiency & Ranges; Autistic Phenotypes: Language, Communication, & Behaviors

40:45 Language & Communication; Self-Injurious Behaviors; Hyperactivity, Agitation; Treatment duration

42:53 Folate Autoantibodies & Maternal Health & Markers

45:30 Studies & Behavioral outcomes; inflammation & thyroid findings

46:58 Neural development; Language connections, white matter tracts & distal connections

48:53 Leucovorin for different severity/levels of Autism; Spinal Bifida

51:08 Preparing for pregnancy

53:50 Transgenerational aspects of Folate Autoantibodies Research; Prenatal Care & Awareness

59:32 Guidance & Support