---
title: "278: How the MTHFR Gene & Methylation Affect Sleep"
entity: "podcast"
canonical_url: "https://www.thesleepdetective.com/podcast/278-how-the-mthfr-gene-methylation-affect-sleep"
markdown_url: "https://www.thesleepdetective.com/llms/podcast/278-how-the-mthfr-gene-methylation-affect-sleep"
lastmod: "2026-10-14T11:22:31.000Z"
---
Episode Show Notes
Register for my free masterclass, Sleep Through the Night: Find the Hidden Imbalances Keeping You Awake, on October 22nd at 3:00 PM ET: https://thesleepdetective.com/masterclass-signup
Join the Complete Sleep Solution Program here (https://l.bttr.to/9LmUt).
In this episode, I explain why having the MTHFR gene variant and taking methylated B vitamins might not be fixing your sleep, and why the gene might not be the problem at all.
You'll learn:
- Why having the MTHFR variant doesn't automatically mean you have a methylation problem, and why you can have a methylation problem without it
- The difference between undermethylating and overmethylating, and how to tell which one might fit you
- The common sign people overlook that can point to a methylation problem
- How methylation connects to your hormones, histamine, and the brain chemicals that help you sleep
- What to do first so you don't waste money on supplements you don't need
00:00 MTHFR Sleep Confusion
00:45 Personal MTHFR Story
01:25 Sleep Masterclass Invite
02:15 Methylation Basics
03:14 What MTHFR Does
04:01 Two Key Variants
05:13 Variant vs Real Issues
06:27 Signs Methylation Off
07:59 Under vs Over Methylation
10:12 Why It Wrecks Sleep
12:14 What To Do Next
14:38 Wrap Up And Register
Listen and follow: Apple Podcasts ยท Spotify