What’s actually going on
How I think about this.
Hair loss in adults is almost always a downstream signal. The follicle is one of the most metabolically demanding structures in the body, and it shuts down first when the system is short on what it needs. The drivers I see most are thyroid drift (subclinical hypothyroid commonly presents with hair changes first), iron and ferritin gaps (women in particular run ferritin too low to support healthy hair even when their hemoglobin is normal), hormonal shifts in perimenopause and andropause, protein insufficiency in patients who think they are eating enough but aren't, and the inflammation patterns that come out of gut dysbiosis.
For male-pattern hair loss, DHT sensitivity at the scalp is the proximate cause, but the upstream metabolic and hormonal context shapes how aggressively it progresses. For female-pattern hair loss, the DHT pathway matters less and the estrogen, progesterone, and thyroid story matter more.
Stress-driven hair loss (telogen effluvium) typically shows up two to three months after the stressor, which makes patients miss the connection entirely.
The physician’s lens
How I read this in practice.
I read hair loss with the full thyroid panel (TSH alone is not enough), iron studies with ferritin (target above 70 ng/mL for hair, not the lab's floor of 15), the sex hormones with binding proteins, fasting insulin, vitamin D, omega-3 index, and zinc status. The metabolomic panel catches the nutrient story underneath all of this. For sudden shedding, I look back three months for what changed.
The systems behind it
Where this symptom comes from.
Most cases touch more than one. Open each area to read the biology underneath.
Biological pillars
Pillar
Metabolomics.
Urinary organic acids read the upstream patterns of energy production, neurotransmitter balance, detoxification, and recovery.
Read this pillarPillar
Gut-Immune health.
The microbiome runs 70% of your immune system, shapes inflammation, mood, and metabolism. Read the ecosystem directly.
Read this pillarPillar
Exposomics.
You cannot optimize a system under continuous environmental pressure. I measure the load directly.
Read this pillarWhat I’d test first
The data that explains it.
Hair work needs the thyroid axis read properly (TSH with free T3, free T4, reverse T3), iron studies with ferritin, and the sex hormones together. The metabolomic panel adds the nutrient and detoxification patterns standard labs miss.
Blood work
Hormone health blood panels
Reads the full thyroid axis, sex hormones, and ferritin together. The three most common drivers of hair loss in one draw.
Read the panelSpecialty testing
Metabolomix+
Adds B-vitamin status, methylation, zinc, and the toxic-metal load that can disrupt follicle metabolism.
Read the panelWhile you wait
Moves worth making before testing.
These are the levers I’d pull while we set up the workup. Most of them produce real signal inside two weeks.
- Eat 30 grams of protein at breakfast. Most hair-loss patients are underfeeding their follicles before lunch.
- Get your ferritin checked. Optimal for hair is above 70 ng/mL, not the lab's normal floor of 15.
- Cut crash diets and aggressive caloric deficits. Hair shuts down first when the body senses a famine.
- If you recently went through a big stressor (illness, surgery, childbirth, big life event), expect the shedding three months later. The cause is real even when it does not feel related.
If two weeks of the basics doesn’t move the needle, that is exactly the kind of presentation a Precision Call exists for. Your biology is telling you something the lifestyle layer cannot fix on its own.
More reading
What I’ve written on this system.
Article
EMF exposure and health: the honest answer.
The EMF discourse oscillates between dismissal and catastrophe. The honest position is that the evidence for harm at typical exposure levels is weak, the harm-mitigating habits are cheap, and one specific exposure (phone in the bedroom) is worth addressing for reasons beyond EMF.
Read thisArticle
Mold exposure and chronic illness.
Mold exposure from water-damaged buildings is a real cause of chronic illness in a subset of patients. The diagnosis is overcalled in the wellness world and underrecognized in conventional medicine. The honest middle is where the clinical work happens.
Read thisArticle
What is the exposome? And why I read it.
Your exposome is the cumulative environmental load your body has carried over a lifetime. Most of it is measurable. Most of it is reducible. And most of the time it is the missing piece on a plan that is not working.
Read thisBrowse other symptoms
Something else on your mind?
Fatigue and low energy
When the tank stays low no matter how much you sleep.
Brain fog
The lights are on but the signal feels weak.
Poor sleep
Either you can't fall asleep, or you can't stay asleep.
Digestive issues
Bloating, irregularity, sensitivities that keep widening.
Mood and stress
Patience runs short, recovery from stress takes longer.
Hormonal imbalance
Energy, sleep, libido, and weight stop responding to the basics.
Perimenopause
The years when the body's hormonal rhythm changes, before the period stops.
Low libido
Desire that used to be reliable is gone or muted. Both sexes, both directions.
Hair loss
Thinning, shedding, or texture changes that didn't used to happen.
Erectile dysfunction
ED is the canary. The body is telling you something about vascular and hormonal health.
Weight loss resistance
You eat well, you train, the scale doesn't move. Something deeper is in the way.
High cholesterol concern
Your last lab flagged it. You want a second opinion before you take a statin.
High blood pressure concern
The reading came back elevated. You want the full picture before you start a prescription.
Insomnia
You can't get to sleep. You can't stay asleep. Or both.
Athletic recovery problems
You train hard. You don't bounce back. Something physiological is in the way.
Headaches and migraines
Recurring headache patterns the standard workup hasn't solved.
Start here
Want me to read your data?
A complimentary 30-minute call by phone or video with me. You tell me what is going on. I tell you how I would approach it. You decide if I am the right physician for you.