Skip to content
GNOUP
Wellness & Health

Thomas DeLauer Recap: Five Morning-to-Afternoon Signs He Links to Insulin Resistance

Takeaways and a chaptered guide to Thomas DeLauer's video on morning brain fog, needing breakfast, fasting glucose in the 90s, afternoon crashes and irritability between meals, and the single root cause he says ties them together.

By the GNOUP team · · 6 min read

The latest full video on Thomas DeLauer's official YouTube channel, "This Gross Sign Means Your Mitochondria are Failing You", was posted on November 10, 2026 and runs about 11 minutes. DeLauer, a fitness and nutrition content creator, talks solo about five everyday signs (six, he says, if you count morning bad breath) that he believes point to insulin resistance or what he calls metabolic inflexibility: trouble switching to stored fat for fuel when you have not eaten. The title is his framing; this article does not diagnose anything, and only a doctor and proper lab tests can tell you where you stand.

This is an independent summary written by GNOUP. It is not affiliated with, sponsored by or endorsed by Thomas DeLauer, his channel, website or any sponsor. The views and claims described below belong to the speaker, not to GNOUP. This is general information only and is not medical advice. Symptoms like brain fog, fatigue, energy crashes and irritability have many possible causes, so please talk with a doctor or other qualified healthcare professional before changing your diet, meal timing or supplements, or if you are worried about your blood sugar. This matters especially if you have a medical condition (including diabetes), take any medication (especially medication that lowers blood sugar), are pregnant or breastfeeding, are under 18, or have a history of an eating disorder. GNOUP has no connection to any product, supplement, brand or paid offer mentioned in or around the video and does not promote any of them.

Key health tips and takeaways

These are ideas DeLauer shared in the video, not instructions. We do not include amounts, schedules or supplement protocols.

  • Sign 1: morning brain fog. DeLauer says the brain runs on glucose and ketones, and that overnight the body is supposed to break down stored fat to keep it fueled. In his view, chronically elevated insulin suppresses that fat breakdown, so the brain is short on both fuels until coffee or food arrives. He also links morning bad breath to the same struggle to switch fuels.
  • Sign 2: you can't function without breakfast. He argues that needing breakfast (not just enjoying it) can have a metabolic reason, not only habit. He describes the morning cortisol rise that releases glucose from the liver and says that when ketone production is blunted, food ends up filling a gap the body should cover on its own. He believes caffeine and quick carbs often mask this.
  • Sign 3: fasting glucose in the 90s. He says many people assume a fasting glucose in the low 90s is fine because it is below the diabetes range, but in his view it can mean insulin is elevated. He adds caveats: people eating low-carb or fasting regularly can see higher morning readings for other reasons (he says his own runs 95 to 100), and he suggests checking insulin, and possibly cortisol, rather than reacting to one number.
  • Sign 4: afternoon crashes. He describes the after-lunch slump as a glucose-disposal problem, where a bigger blood sugar spike takes longer to clear and then overshoots below baseline. He says the same lunch followed by the same crash day after day is a recognizable pattern.
  • Sign 5: irritability between meals. He separates ordinary hunger from what he sees as a stress response when the body cannot bridge the gap between meals, showing up as irritability, anxiety and trouble thinking until you eat.
  • One root cause, in his view. DeLauer says these are not five problems but five symptoms of one: chronically high insulin "locking" fat stores so the body struggles between meals. He stresses that he believes metabolic flexibility is trainable, and says he was type 2 diabetic himself about 13 years ago.
  • His simplest starting point. His lowest-effort suggestion is eating dinner earlier in the evening to lengthen the overnight gap without other changes, which he believes improves insulin sensitivity. That is his opinion; meal timing changes can be risky for people on diabetes medication or with a history of disordered eating, so check with a doctor first.

A practical note from GNOUP, not from the video: according to the American Diabetes Association, a fasting plasma glucose of 100 to 125 mg/dL is in the prediabetes range and 126 mg/dL or higher (confirmed by a repeat test) indicates diabetes. In the video DeLauer puts the diabetes threshold at "120ish," so we are noting the official figures here. Questions about your own numbers belong with your doctor.

Newsworthy insights

These are claims and opinions from the video. The video's description does not list any studies, and GNOUP has not verified them.

  • An "energy problem," not just a glucose problem. DeLauer frames insulin resistance as mainly an energy and inflammation problem rather than only a blood sugar problem.
  • Low-carb readings. He describes his own higher fasting glucose on a low-carb diet as a temporary, protective kind of insulin resistance in the body's cells. This is his explanation, and he says it does not apply to someone eating a typical diet.
  • A size estimate. He says lengthening the overnight gap by a couple of hours probably improves insulin sensitivity by 15% to 20%. He does not cite a study for that figure, so treat it as his estimate.
  • Creatine. He also talks about why he likes creatine in the morning, describing it as spreading energy around the body like a power grid. That discussion runs into a paid sponsor segment, so we have left out the product, the offer and any dosing or timing details.

Watch the video

This Gross Sign Means Your Mitochondria are Failing You on YouTube (official channel "Thomas DeLauer," @ThomasDeLauerOfficial, published November 10, 2026, about 11 minutes)

Episode guide

These chapters come from the video's own description (titles lightly reworded). Each link opens the video at that point.

About this summary

This recap was prepared from the video's title, description and chapter list, and a transcript of the video. We left out a paid sponsor segment for a creatine product, along with its discount and product claims, creatine timing details, specific meal times, his newsletter and social links, and a plug for another of his videos. Transcripts can contain errors, so for the exact words and context, watch the video. This article is general information, not medical advice, and is not a substitute for guidance from a doctor or other qualified healthcare professional.