- 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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Oral Minoxidil: Before and After Photos [2025]
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Does Topical Dutasteride Work?
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Where to Buy Topical Finasteride?
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Dutasteride Before and After: 10 Success Stories
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Where To Buy Topical Dutasteride?
-
Does Topical Finasteride Work?
-
Topical Minoxidil for Hair Growth: Efficacy, Safety, and How to Enhance Results
-
Oral Minoxidil for Hair Growth: Is it Effective and Safe? Our Analysis
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 TeamFeb 23, 2023How Does Minoxidil Work? 3 Hypotheses + Debates
Despite decades of study and FDA approval, researchers still aren’t sure exactly how minoxidil regrows hair. Over the last few years, investigators have explored a number of hypothetical mechanisms ranging from vasodilation to prostaglandin modulation to anti-androgenic effects. In this articl...
By Perfect Hair Health TeamFeb 23, 2023How Often Do I Need To Apply Topical Finasteride?
Is a single daily topical finasteride application enough to significantly reduce DHT levels and regrow hair? It depends on the dilution of topical finasteride, the application volume (in mL), the carrier ingredients, how long that topical finasteride is left on the scalp prior to washing it out, and...
By Perfect Hair Health TeamFeb 22, 2023How Often Do I Need To Take Oral Finasteride?
Oral finasteride is prescribed at 1 mg daily to treat androgenic alopecia (AGA). However, clinical studies suggest that doses as low as 0.2 mg daily can reduce levels of dihydrotestosterone (DHT) nearly the same as 1.0 mg daily doses, and improve hair counts similarly to 1 mg daily. But do these low...
By Perfect Hair Health TeamFeb 20, 2023How Long Does Finasteride Stay in Scalp Tissue?
Finasteride is an FDA-approved hair loss treatment, with clinical studies showing that the drug lowers levels of the hormone dihydrotestosterone (DHT) by 60-70%, and in doing so, improves outcomes of androgenic alopecia (AGA) for 80-90% of the men who try to the drug. But how long do finasterideR...
By Perfect Hair Health TeamFeb 17, 2023How Long Does Finasteride Stay in the Bloodstream?
Oral finasteride is an excellent option for men wanting a ‘hands-free’ approach to hair maintenance. However, some men decide to temporarily or discontinue use of the drug to troubleshoot side effects, conceive, or even start donating blood. Under these circumstances, how long does finasteride stay ...
By Perfect Hair Health TeamFeb 16, 2023What’s the Best Dose of Finasteride for Hair Loss?
The best daily dose of finasteride should strike the balance between minimizing drug exposure (and thereby side effect risks) while maximizing drug efficacy (and thereby hair regrowth). While the FDA has approved 1 mg daily doses of finasteride for androgenic alopecia, there’s also evidence th...
By Perfect Hair Health TeamFeb 16, 2023What Is Post-Finasteride Syndrome (PFS)? Is It Real? And What Is Its Prevalence?
Post-Finasteride Syndrome (PFS) is a term used to describe persistent sexual or cognitive side effects from finasteride, even months after quitting the medication. The existence of PFS is hotly debated amongst hair loss researchers, endocrinologists, and dermatologists. In this article, we’ll ...
By Perfect Hair Health TeamFeb 15, 2023Can I Make Topical Finasteride By Crushing Pills?
It’s possible to make homemade topical finasteride by crushing pills. However, some pills have a protective coating that may prevent them from dissolving in a topical. Under these circumstances, any coating must be removed prior to crushing, and even then, not all crushed debris will dissolve. For t...
By Perfect Hair Health TeamFeb 14, 2023Can I Make My Own Topical Finasteride?
Compounding pharmacies can charge $50-$100 per month to formulate topical finasteride. This has led many users to wonder if they can save money by making topical finasteride at home – either by crushing finasteride pills or diluting pre-purchased topical finasteride. Both options are possible, but r...
By Perfect Hair Health TeamFeb 7, 2023If I Am Planning a Family, Should I Stop Taking Finasteride? (Men & Women)
Females using oral finasteride are advised to quit the drug at least one month before conceiving, as well as throughout pregnancy and breastfeeding. But what about men? The evidence is nuanced. Some clinicians claim that finasteride use for men during windows of conception poses no risk to a develop...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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