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Doctor Mike Hansen - EATING 100 pounds of McDonald’s DID THIS to my BRAIN

Thumbnail of the video “Doctor Mike Hansen - EATING 100 pounds of McDonald’s DID THIS to my BRAIN”
Community upload. AI output has not been independently verified.
Author: Doctor Mike Hansen
Categories: Health Nutrition Psychology
Tags: health, nutrition, psychology
Views: 2 · Last viewed: 2026-10-17 04:08 UTC

Short Summary

Main recommendation: Eat unprocessed food rather than high-fat, refined, high-sugar fast food, because the video's cognitive and mood test results after a 10-day McDonald's binge showed mild declines in memory, attention, processing speed, and mood. The creator and psychiatrist Dr. Ali link these changes to insulin and dopamine swings from sugar and refined carbohydrates, though the video itself notes it is hard to separate the effects of the diet from the effects of eating 100 lbs of McDonald's in 10 days.

Key Points

  • Two MoCA-style cognitive tests were given before and after the diet: Mike scored 30/30 at baseline and 28 after, with the main drop in delayed recall and attention; Fan's Mandarin-language test went from 29 on the first test to a couple points lower on the follow-up, with memory, attention, and processing speed affected.
  • Processing speed was flagged as the key change: the psychiatrist said it is better to time these tests, since a patient could score the same but take much longer after eating poorly.
  • Mood results shifted for Fan: no depression at baseline, but on follow-up he reported low mood, trouble sleeping, sluggishness, and anxiety, with no suicidal thoughts.
  • Dr. Ali attributes the effects to a high-fat, low-fiber, refined-carb, added-sugar diet with few micronutrients, which he says causes repeated insulin spikes and crashes and dopamine swings that drive cravings.
  • Dr. Ali also said it's probably no coincidence that Alzheimer's disease is highly linked with sugar consumption, offering this as his own opinion rather than a proven finding.

Details Worth Noting

  • Concrete instructions: The video's only actionable advice is to eat unprocessed food and avoid large amounts of refined carbohydrates and added sugar. No amounts, timing, or step-by-step preparation were given; the video suggests viewers share any healthy lifestyle changes in the comments.
  • The tests used were the MoCA (cognitive: trail-making connect, cube copy, clock drawing, naming, five-word memory, digit span, serial-7 subtraction, sentence repetition, letter fluency, similarities, delayed recall, orientation) and the Hamilton Depression Rating Scale, which is a subjective self-rating.
  • Dr. Ali noted that education level, language, and culture affect results; Fan's first MoCA was scored lower on the cube copy, so a Mandarin version was used for accuracy.
  • Dr. Ali cautioned that the tests are not a diagnosis and that individuals can score lower than their actual capacity.
  • The experiment involved two participants, not a controlled study, and Dr. Hansen explicitly says it's hard to know whether changes were due to overeating, McDonald's specifically, or both.

Bottom Line

In this small, informal experiment, a short stretch of heavy fast food was followed by modest drops in memory, attention, processing speed, and mood, which the psychiatrist attributes to sugar and refined-carb blood sugar and dopamine swings rather than proving a direct cause.