Is Bipolar Disorder Really a Diet Problem w/ Dr. Iain Campbell

Mark Hyman

Jul 30, 2025

Episode description

On this episode of The Dr. Hyman Show, we’re exploring the emerging science of metabolic psychiatry. My guest, Dr. Iain Campbell, is a researcher at the University of Edinburgh and someone who has lived with bipolar disorder himself. He brings a rare dual perspective as both a scientist and a patient to this critical conversation.  Together, we discuss what’s really driving psychiatric conditions like bipolar disorder and why a systems-based approach may hold the key to meaningful recovery.

Catch our full conversation on YouTube here - https://youtu.be/YCcZb2H2Ceg

We unpack:

• What it means when mental health symptoms start in the body—not just the brain

• How to tell if metabolism, sleep, or inflammation are driving your mood swings

• Why seasonal changes impact energy and mood, and how you can stay steady year-round

• When keto might help where meds haven’t, and what to know before trying it

• How to catch metabolic red flags before they affect your mental health

When we shift how we see mental health, real healing becomes possible. There are answers, and this episode can help you find them.

View Show Notes From This Episode


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This episode is brought to you by Sunlighten, Paleovalley, AirDoctor and LMNT. Visit sunlighten.com and save up to $1400 on your purchase with code HYMAN. Get nutrient-dense, whole foods. Head to paleovalley.com/hyman for 15% off your first purchase. Get cleaner air. Right now, you can get up to $300 off at airdoctorpro.com/drhyman. Get a free LMNT Sample Pack with any order—just head to drinklmnt.com/hyman.

Episode description

On this episode of The Dr. Hyman Show, we’re exploring the emerging science of metabolic psychiatry. My guest, Dr. Iain Campbell, is a researcher at the University of Edinburgh and someone who has lived with bipolar disorder himself. He brings a rare dual perspective as both a scientist and a patient to this critical conversation.  Together, we discuss what’s really driving psychiatric conditions like bipolar disorder and why a systems-based approach may hold the key to meaningful recovery.

Catch our full conversation on YouTube here - https://youtu.be/YCcZb2H2Ceg

We unpack:

• What it means when mental health symptoms start in the body—not just the brain

• How to tell if metabolism, sleep, or inflammation are driving your mood swings

• Why seasonal changes impact energy and mood, and how you can stay steady year-round

• When keto might help where meds haven’t, and what to know before trying it

• How to catch metabolic red flags before they affect your mental health

When we shift how we see mental health, real healing becomes possible. There are answers, and this episode can help you find them.

View Show Notes From This Episode


Get Free Weekly Health Tips from Dr. Hyman

https://drhyman.com/pages/picks?utm_campaign=shownotes&utm_medium=banner&utm_source=podcast

Sign Up for Dr. Hyman’s Weekly Longevity Journal

https://drhyman.com/pages/longevity?utm_campaign=shownotes&utm_medium=banner&utm_source=podcast

Join the 10-Day Detox to Reset Your Health

https://drhyman.com/pages/10-day-detox

Join the Hyman Hive for Expert Support and Real Resultshttps://drhyman.com/pages/hyman-hive



This episode is brought to you by Sunlighten, Paleovalley, AirDoctor and LMNT. Visit sunlighten.com and save up to $1400 on your purchase with code HYMAN. Get nutrient-dense, whole foods. Head to paleovalley.com/hyman for 15% off your first purchase. Get cleaner air. Right now, you can get up to $300 off at airdoctorpro.com/drhyman. Get a free LMNT Sample Pack with any order—just head to drinklmnt.com/hyman.

Mindsip insights from this episode:

Understand seasonal mood variations as evolutionary responses

The seasonal variation in bipolar symptoms may be a dysregulation of ancient survival mechanisms for energy allocation, similar to hibernation or migratory restlessness seen in animals.

Monitor insulin resistance to predict psychiatric illness risk

Large data studies show that insulin resistance in early life is a predictive marker for the future onset and severity of psychiatric conditions.

Implement ketogenic diet to calm the brain in bipolar patients

A pilot study using functional MRI showed that a ketogenic diet significantly reduced brain glutamate, an excitatory neurotransmitter, in bipolar patients, suggesting a calming effect on the brain.

Recognize bipolar depression as a state of profound exhaustion

The experience of bipolar depression is not just sadness, but a physiological crisis of suppressed energy that feels like being indefinitely paused in a state of complete exhaustion after running a marathon.

Experience mental clarity and stability with a ketogenic diet for bipolar disorder

For some with bipolar disorder, a ketogenic diet can feel like the lights in the brain are clicking back on, providing mental clarity and emotional stability for the first time.

Address energy metabolism to resolve mental illness issues

Viewing mental illness as a neurotransmitter imbalance is like adjusting the air conditioning when the car's engine is on fire; the root cause is a fundamental disruption in energy metabolism.

Target insulin signaling pathways with lithium for metabolic health

Lithium, a primary medication for bipolar disorder, may work by targeting the body's insulin signaling network, suggesting the drug is bluntly addressing an underlying metabolic problem.

Redefine mental illness diagnosis to uncover biological roots

The current diagnostic system for mental illness is like using the wrong map for the territory because it only describes symptoms without identifying the underlying biological root causes.

Identify elevated brain lactate as a marker for mitochondrial dysfunction

Elevated lactate, a marker of mitochondrial dysfunction and the same substance that causes muscle soreness, has been observed in the brains of psychiatric patients for decades.

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