The Hidden Metabolic Disorder: Understanding HPU and Its Impact on Mood, Energy, and Mind

If you've cycled through diagnoses—anxiety, depression, ADHD, bipolar spectrum, chronic fatigue, sensory processing disorder—without ever finding an explanation that fits, this book is for you.

THE HIDDEN METABOLIC DISORDER explores pyrrole disorder, also known as HPU a metabolic pattern that standard medicine rarely tests for and frequently misses. It is estimated to affect as many as one in ten women, and far higher proportions of people living with severe mood, sensory, and cognitive symptoms. Yet most people who carry it have never heard its name.

Drawing on decades of clinical observation, nutritional biochemistry, and the lived experience of countless patients, Prince Penman explains:

·        What pyrroles are and how they quietly deplete zinc and vitamin B6

·        Why those two nutrients are essential for serotonin, dopamine, and GABA

·        How depletion can show up as mood instability, anxiety, fatigue, brain fog, and sensory sensitivity

·        Why standard bloodwork can look "normal" while you feel anything but

·        How assessment works—and what testing can and cannot tell you

·        The nutritional foundations and supplementation principles commonly used

·        How to work with a practitioner rather than around one

This is not a book that promises a cure. It is not a book that tells you to abandon psychiatric care. The science of HPU is real but unsettled, and this book is honest about the difference between what is established, what is contested, and what remains unknown.

What it offers instead is something rarer: clarity. A framework for asking better questions. A language for experiences you may have struggled to describe. And a grounded, realistic path forward.

For readers of nutritional psychiatry, functional medicine, and root-cause health—and for anyone who has ever left a doctor's office feeling dismissed.

Your experience is real. It deserves a name.