Foundational Guide
The Complete Guide to Hair Longevity
Understand how hair loss works, the most common causes of thinning and shedding, what early signs matter, which tests are worth considering, and what evidence-based options may actually help.
Hair Longevity Institute
Hair loss guides
Start with the foundational guide, then go deeper on medications, postpartum health, men's pattern loss, and hormones. Each guide now works as a pillar page with web summaries, FAQs, decision support, and PDF access where available.
Start here
Treatment Guide
Hair Loss Medications in 2026
A pillar guide to what is available now, what is used off-label, what is natural, what is still in trials, and how to compare options without hype.
Women's Hair Health
The Truth About Postpartum Hair Loss
Understand why postpartum shedding happens, what is normal, when to investigate further, and how to support healthier regrowth.
Men's Hair Health
Male Pattern Hair Loss: Causes, Stages, and What Actually Helps
Learn how male pattern hair loss progresses, what early signs to look for, and which evidence-based strategies may actually help.
Hormones & Hair
Testosterone, DHT, TRT, Steroids, and Hair Loss Risk in Men and Women
Explore how androgen biology, hormone exposure, and follicular sensitivity can shape hair-loss risk in both men and women.
Specific questions
Targeted insight articles that pair with the guides — not substitutes for the pillar pages above.
Use the guides first, then branch into insights
Guides give you the big picture. The insight hubs let you keep reading by cause, blood marker, or treatment question without leaving the core HLI information architecture.