Sep 14, 2026 · 21 min
Dietary triggers may be clouding brain function
5 Foods That Are Making Your Brain Fog Worse
The episode frames brain fog as a potentially modifiable symptom shaped by diet, gut health, blood sugar, inflammation, and the microbiome.
- 1Brain fog can involve mental exhaustion, poor focus, forgetfulness, and difficulty finding words rather than simply reflecting aging.
- 2Mark Hyman identifies ultra-processed foods, alcohol, artificial sweeteners, dairy, and gluten as possible individual triggers.
- 3Food journaling, elimination diets, and personalized nutrition may help people investigate which factors contribute to their symptoms.
Don't miss
Mark Hyman reframes brain fog as a symptom worth investigating through diet, gut health, blood sugar, inflammation, and microbiome patterns.
The brief
Brain fog shows up as mental exhaustion, poor focus, forgetfulness, and difficulty finding words. Mark Hyman challenges the idea that these symptoms are simply a normal part of aging.
The episode shifts attention beyond the brain, examining how diet, gut health, blood sugar instability, inflammation, and microbiome changes may shape cognitive clarity.
Five common food categories come under scrutiny: ultra-processed foods, alcohol, artificial sweeteners, dairy, and gluten. The point is not that every trigger affects everyone equally.
Instead of treating food rules as universal, Hyman emphasizes investigation through food journaling, elimination diets, and personalized nutrition to identify individual contributors.
The central takeaway is practical but cautious: tracking patterns may reveal modifiable influences on brain fog, without reducing a complex symptom to one cause.
Featuring
Mark Hyman
Cleveland Clinic
Function HealthListen to the full episode and explore every guest, topic, and moment on PodLume.