Fundamentals
Understand hair biology, growth cycles, common loss patterns, essential terminology, and the tracking principles behind useful comparisons.
6 min read
Menopause Hair Loss: Causes and Treatment
What drives hair loss around menopause, which treatment conversations are realistic, and the warning signs worth a dermatology appointment.
6 min read
Menopause Hair Loss: What to Track
Menopausal thinning usually has more than one cause at once. The patterns, the questions worth asking, and what to track across several months.
6 min read
Thyroid Hair Loss: What to Track
Thyroid shedding is diffuse and arrives months after the change. What that pattern looks like, and what to have measured.
7 min read
How to Prevent Hair Loss: What the Evidence Actually Supports
Pattern loss cannot be prevented by habits. What can be, and what is worth doing first.
11 min read
Iron Deficiency and Hair Loss: What the Lab Values Mean
Ferritin below 30 ng/mL impairs hair cycling even when the lab calls it normal. What to ask for, and how long repletion takes to show.
8 min read
Protein Deficiency and Hair Loss: When Your Diet Starves Your Follicles
Hair is 95 percent keratin. Below 0.8 g per kg a day the body stops paying for it. Intake, sources, and the crash-diet trap.
10 min read
Scalp Microbiome and Hair Loss: How Bacteria and Fungi Affect Your Follicles
Malassezia feeds on sebum and leaves fatty acids that inflame the follicle. How the scalp's bacteria and fungi affect shedding.
10 min read
Hair Miniaturization: How Follicles Shrink and What You Can Do About It
Follicles do not die, they shrink, cycle by cycle. Why visible thinning arrives only after half the zone has already gone.
9 min read
Stem Cell Therapy for Hair Loss: Where the Research Actually Stands
What the trials actually show, what the clinics are actually selling, and how far off real follicle restoration is.
9 min read
Hair Cloning and Follicle Multiplication: Where the Research Stands
Dermal papilla cells lose their power in culture. That one problem is why hair cloning is still a decade away.
10 min read
The Wnt Pathway and Hair Growth: Understanding the Molecular Switch
Wnt signaling switches follicles into growth, and DHT jams it through DKK1. The molecular story behind pattern loss.
5 min read
Cortisol and Hair Loss: How Stress Hormones Trigger Shedding
Chronic cortisol shortens anagen and empties the bulge stem cell pool. Why stress shedding shows up two to three months late.
10 min read
Hair Loss Anxiety: Why It Happens and How Data Breaks the Cycle
Hair loss anxiety runs on not knowing. What the research says about that cycle, and how one measurement breaks it.
9 min read
9 Hair Loss Myths Debunked: Separating Fact from Fiction
Hats do not cause baldness. High testosterone does not either. Here are 9 common hair loss myths and what the research actually shows.
6 min read
Hair Loss Genetics: Can You Actually Predict Whether You Will Go Bald?
Over 200 genetic loci, not just your mother's father. What a consumer DNA test can and cannot tell you about going bald.
7 min read
Why Hair Thins with Age, Even Without Pattern Baldness
Senescent alopecia thins the whole scalp without a Norwood pattern. What changes in the follicle after 40, and what nothing yet treats.
9 min read
Can You Reverse Hair Loss? The Evidence by Type and Stage
Some hair loss reverses completely, some partially, and some not at all. The evidence, by type and by stage.
9 min read
Hair Growth Cycle: Why Results Take Months
Anagen, catagen, telogen, exogen. The four phases of the cycle, how pattern loss disrupts them, and why no treatment shows anything before three months.
7 min read
DHT and Hair Loss Explained: Mechanism, Myths, and What to Track
How DHT shrinks a follicle across successive cycles, why blood levels predict nothing, and what to measure instead.
6 min read
Hair Density vs Hair Thickness: What's the Difference for Tracking?
A practical tracking guide to density vs thickness: what each metric means, what to photograph, and how to avoid mixing signals across weeks.
6 min read
Creatine and Hair Loss: Evidence and Tracking Framework
A practical evidence-and-tracking framework for evaluating creatine concerns without overreacting to timing coincidence or noisy snapshots.
6 min read
Biotin for Hair Loss: Evidence Checklist
Use a structured checklist to test whether biotin belongs in your plan, with explicit goals, stop criteria, and follow-up logic.
11 min read
Androgenetic Alopecia: Family History Checklist
How beginners can use family-history context responsibly without replacing direct trend evidence.
5 min read
Do Hats Cause Hair Loss? What the Evidence Actually Says
No. Where the myth comes from, and the one kind of headwear that really does cause loss.
7 min read
Norwood Scale Explained: Stages, Examples, and How to Track Yours
What each Norwood stage actually means, and why a single photo cannot assign one.