- 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.
-
Oral Finasteride Before and After: Real Case Studies
-
Does Topical Finasteride Work?
-
Women: Is Topical Minoxidil Safe While Trying to Conceive?
-
Men: Is Topical Minoxidil Safe While Trying to Conceive?
-
Finasteride and Dry Eye Disease: Is There A Connection?
-
5 Ways to Prevent Hair Loss While Taking Testosterone
-
Best Topical Dutasteride: 8 Choices for 2025
-
Best Topical Finasteride: 5 Top Products of 2025
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 Perfect Hair Health TeamNov 13, 2025Oral Finasteride Before and After: Real Case Studies
Oral finasteride remains the gold-standard treatment for male pattern hair loss, with decades of data showing consistent improvement in density and prevention of further thinning. However, dramatic online regrowth photos can lead to unrealistic expectations. In your regrowth journey, it’s important ...
By Sarah King, PhDNov 13, 2025Does Topical Finasteride Work?
Topical finasteride is quickly emerging as a compelling alternative to oral finasteride for treating androgenic alopecia, promising similar hair regrowth with significantly fewer systemic side effects. But does topical finasteride work? In this article, we break down how topical finasteride works, h...
By Michael Williams, PhDNov 12, 2025Women: Is Topical Minoxidil Safe While Trying to Conceive?
Topical minoxidil is the most widely used treatment for female hair loss, but is it safe when trying to conceive? Here’s what current research says about fertility, pregnancy, and reproductive risks.
By Michael Williams, PhDNov 12, 2025Men: Is Topical Minoxidil Safe While Trying to Conceive?
Many men use topical minoxidil to combat hair loss, but is it safe to continue while trying to conceive? Curious how the science stacks up and what experts actually recommend? Explore our evidence-based review to learn the facts about topical minoxidil and male fertility....
By Michael Williams, PhDNov 12, 2025Finasteride and Dry Eye Disease: Is There A Connection?
Finasteride is a well-established treatment for hair loss, but some reports suggest it may contribute to dry eye disease. This article examines how finasteride’s hormonal effects may impact tear production, reviews current research findings, and provides practical steps for managing or preventing ey...
By Perfect Hair Health TeamNov 11, 20255 Ways to Prevent Hair Loss While Taking Testosterone
Testosterone replacement therapy can transform energy, mood, and libido, but it often comes with an unwelcome side effect: accelerated hair loss. This guide breaks down the science of how TRT ramps up DHT and outlines five evidence-based strategies to protect your hair without sacrificing hormonal b...
By Perfect Hair Health TeamNov 11, 2025Best Topical Dutasteride: 8 Choices for 2025
Topical dutasteride is emerging as a powerful next-generation option for treating hair loss. This expert-reviewed guide ranks the 8 best topical dutasteride treatments, comparing strength, safety, and customization, to help you find the most effective DHT-blocking solution for your needs. From Ulo’s...
By Perfect Hair Health TeamNov 10, 2025Best Topical Finasteride: 5 Top Products of 2025
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...
By Sarah King, PhDNov 8, 2025Minoxidil Side Effects: Everything You Need To Know
Minoxidil is an FDA-approved treatment for androgenic alopecia, but its use can come with side effects – from mild scalp irritation to cardiovascular risks. This comprehensive guide assess common and rare side effects from topical minoxidil and oral minoxidil – along with mitigation strategies....
By Perfect Hair Health TeamNov 8, 2025Parts of the Scalp: A Guide to the Anatomy, Mechanics, and New Treatment Possibilities
This article takes a detailed tour of scalp anatomy – the regions of the scalp, the muscles, the arteries, the nerves, and the scalp layers. Then we’ll explore the evidence supporting a possible connection between relaxed muscles, scalp mechanics, and hair growth.
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
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