- About
- Mission Statement
Education. Evidence. Regrowth.
- Education.
Prioritize knowledge. Make better choices.
- Evidence.
Sort good studies from the bad.
- Regrowth.
Get bigger hair gains.
Team MembersPhD's, resarchers, & consumer advocates.
- Rob English
Founder, researcher, & consumer advocate
- Research Team
Our team of PhD’s, researchers, & more
Editorial PolicyDiscover how we conduct our research.
ContactHave questions? Contact us.
Before-Afters- Transformation Photos
Our library of before-after photos.
- — Jenna, 31, U.S.A.
I have attached my before and afters of my progress since joining this group...
- — Tom, 30, U.K.
I’m convinced I’ve recovered to probably the hairline I had 3 years ago. Super stoked…
- — Rabih, 30’s, U.S.A.
My friends actually told me, “Your hairline improved. Your hair looks thicker...
- — RDB, 35, New York, U.S.A.
I also feel my hair has a different texture to it now…
- — Aayush, 20’s, Boston, MA
Firstly thank you for your work in this field. I am immensely grateful that...
- — Ben M., U.S.A
I just wanted to thank you for all your research, for introducing me to this method...
- — Raul, 50, Spain
To be honest I am having fun with all this and I still don’t know how much...
- — Lisa, 52, U.S.
I see a massive amount of regrowth that is all less than about 8 cm long...
Client Testimonials150+ member experiences.
Scroll DownPopular Treatments- Treatments
Popular treatments. But do they work?
- Finasteride
- Oral
- Topical
- Dutasteride
- Oral
- Topical
- Mesotherapy
- Minoxidil
- Oral
- Topical
- Ketoconazole
- Shampoo
- Topical
- Low-Level Laser Therapy
- Therapy
- Microneedling
- Therapy
- Platelet-Rich Plasma Therapy (PRP)
- Therapy
- Scalp Massages
- Therapy
More
IngredientsTop-selling ingredients, quantified.
- Saw Palmetto
- Redensyl
- Melatonin
- Caffeine
- Biotin
- Rosemary Oil
- Lilac Stem Cells
- Hydrolyzed Wheat Protein
- Sodium Lauryl Sulfate
More
ProductsThe truth about hair loss "best sellers".
- Minoxidil Tablets
Xyon Health
- Finasteride
Strut Health
- Hair Growth Supplements
Happy Head
- REVITA Tablets for Hair Growth Support
DS Laboratories
- FoliGROWTH Ultimate Hair Neutraceutical
Advanced Trichology
- Enhance Hair Density Serum
Fully Vital
- Topical Finasteride and Minoxidil
Xyon Health
- HairOmega Foaming Hair Growth Serum
DrFormulas
- Bio-Cleansing Shampoo
Revivogen MD
- more
Key MetricsStandardized rubrics to evaluate all treatments.
- Evidence Quality
Is this treatment well studied?
- Regrowth Potential
How much regrowth can you expect?
- Long-Term Viability
Is this treatment safe & sustainable?
Free Research- Free Resources
Apps, tools, guides, freebies, & more.
- Free CalculatorTopical Finasteride Calculator
- Free Interactive GuideInteractive Guide: What Causes Hair Loss?
- Free ResourceFree Guide: Standardized Scalp Massages
- Free Course7-Day Hair Loss Email Course
- Free DatabaseIngredients Database
- Free Interactive GuideInteractive Guide: Hair Loss Disorders
- Free DatabaseTreatment Guides
- Free Lab TestsProduct Lab Tests: Purity & Potency
- Free Video & Write-upEvidence Quality Masterclass
- Free Interactive GuideDermatology Appointment Guide
- More
Articles100+ free articles.
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Natural vs. Pharmaceutical DHT Blockers: Ranked
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Redensyl, Capixyl, & Procapil (RCP) For Natural Hair Regrowth? (Scientific Review)
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9 Best Shampoos for Sensitive Scalp
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12 Best Shampoos for Greasy Hair
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Can Miniaturized Hair Follicles Recover, or Is There a Point of No Return?
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Sublingual Minoxidil: More Hair Growth, Less Sides?
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Happy Head Review: 5 Concerns With The Brand
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Can a Blood DHT Test Tell You Whether You Have AGA?
PublicationsOur team’s peer-reviewed studies.
- Microneedling and Its Use in Hair Loss Disorders: A Systematic Review
- Use of Botulinum Toxin for Androgenic Alopecia: A Systematic Review
- Conflicting Reports Regarding the Histopathological Features of Androgenic Alopecia
- Self-Assessments of Standardized Scalp Massages for Androgenic Alopecia: Survey Results
- A Hypothetical Pathogenesis Model For Androgenic Alopecia:Clarifying The Dihydrotestosterone Paradox And Rate-Limiting Recovery Factors
Menu- AboutAbout
- Mission Statement
Education. Evidence. Regrowth.
- Team Members
PhD's, resarchers, & consumer advocates.
- Editorial Policy
Discover how we conduct our research.
- Contact
Have questions? Contact us.
- Before-Afters
Before-Afters- Transformation Photos
Our library of before-after photos.
- Client Testimonials
Read the experiences of members
Before-Afters/ Client Testimonials- Popular Treatments
-
Articles
Explore the science behind hair loss and hair growth. Our in-depth articles cover topics ranging from natural remedies to pharmaceuticals to breakthroughs in hair loss science. Want to request an article topic? Contact us.
IngredientsPharmaceuticalsNatural RemediesCompany Reviews
By Dr. Michael WilliamsOct 21, 2026Natural vs. Pharmaceutical DHT Blockers: Ranked
Natural and pharmaceutical DHT blockers both aim to slow or reverse hair loss, but their strength, safety, and side effects vary widely. This article ranks the most common DHT inhibitors from weakest to strongest, comparing how natural compounds, such as pumpkin seed oil and EGCG, stack up against p...
By Perfect Hair Health TeamOct 21, 2026Redensyl, Capixyl, & Procapil (RCP) For Natural Hair Regrowth? (Scientific Review)
Redensyl, Capixyl, & Procapil (RCP) are 3 trademarked blends constituting 12+ natural ingredients marketed for hair regrowth. RCP rose in popularity after a landmark clinical study suggested that topical RCP could regrow hair better than 5% minoxidil. Our investigation into the clinical data on ...
By Perfect Hair Health TeamOct 14, 20269 Best Shampoos for Sensitive Scalp
If your scalp becomes itchy, red, tight, or flaky after washing, it’s easy to assume you need a gentler shampoo. But scalp sensitivity can have several different causes, and they don’t all respond to the same treatment. An irritated skin barrier, an allergy to a particular ingredient, an...
By Perfect Hair Health TeamOct 14, 202612 Best Shampoos for Greasy Hair
If your hair looks greasy just hours after washing it, the solution isn’t necessarily a stronger shampoo. Excess oil can be influenced by genetics and hormones, but scalp inflammation and dandruff may also play a role. In fact, an inflamed scalp releases signaling molecules (cytokines and pros...
By Sarah King, PhDOct 13, 2026Can Miniaturized Hair Follicles Recover, or Is There a Point of No Return?
In androgenic alopecia, hair follicles do not disappear overnight. Instead, they get progressively smaller, producing shorter, finer, less pigmented hairs that cannot cover the scalp. This article explains what happens to follicles in AGA, whether miniaturized hair follicles are “dead” or dormant, w...
By Perfect Hair Health TeamOct 8, 2026Sublingual Minoxidil: More Hair Growth, Less Sides?
Oral minoxidil is one of the most effective treatments for pattern hair loss. Its main drawback is its impact on the cardiovascular system. Because minoxidil is a vasodilator, it can cause reflex tachycardia, heart palpitations, dizziness, and fluid retention, most commonly at doses of 5 mg and abov...
By Dr. Michael WilliamsOct 8, 2026Happy Head Review: 5 Concerns With The Brand
Is Happy Head’s personalized hair-loss approach as science-backed as it sounds? In this in-depth review, we break down five key concerns with the telehealth brand’s products and claims. While prescription treatments like minoxidil, finasteride, and dutasteride can be effective, how they’re delivered...
By Sarah King, PhDOct 7, 2026Can a Blood DHT Test Tell You Whether You Have AGA?
A blood DHT test may seem like a clear way to explain hair thinning, but it cannot diagnose androgenic alopecia on its own. This article explains why scalp follicles respond to local androgen activity, genetic susceptibility, and follicle-specific signalingnot simply the amount of DHT circulating in...
By Sarah King, PhDOct 5, 2026ABS-201: Can Blocking the Prolactin Receptor Regrow Hair?
ABS-201 is an investigational antibody designed to block the prolactin receptor rather than target DHT directly. In our interview with Absci, the company outlined why it believes sustained receptor blockade could support hair growth. We examine that hypothesis, the early laboratory and animal findin...
By Perfect Hair Health TeamOct 5, 2026Best Topical Finasteride: 5 Top Products of 2026
Topical finasteride is exploding in popularity, but not all formulas are created equal. This guide breaks down the 5 best topical finasteride treatments on the market, comparing strength, safety, customization, and real-world value. From ultra-tailored prescriptions like Ulo to big telehealth brands...Stop guessing which hair loss
treatments actually workInstead, just read our cheat sheet
You’ll get the facts on nine “natural” and “conventional” hair loss treatments: how they work, how much hair they’ll regrow, their limitations, and what their marketers don’t want you know.
- Mission Statement