- 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.
-
Best Minoxidil for Women: Top 6 Brands of 2026
-
Best Minoxidil for Men: Top Picks for 2026
-
Best Topical Finasteride: 5 Top Products of 2026
-
Oral Finasteride Before and After: Real Case Studies
-
Best Topical Dutasteride: 8 Choices for 2026
-
Switching From Finasteride to Dutasteride
-
Does Finasteride Lower Testosterone?
-
Saw Palmetto Shampoo: Is It Effective for Hair Loss?
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 TeamJan 16, 2026Best Minoxidil for Women: Top 6 Brands of 2026
With so many hair-thinning treatments marketed to women, it can be difficult to separate what truly works from what’s just hype. This evidence-based guide ranks the best minoxidil options for women in 2026, including prescription and over-the-counter formulas, based on effectiveness, tolerability, c...
By Sarah King, PhDJan 16, 2026Best Minoxidil for Men: Top Picks for 2026
With countless hair loss products on the market, choosing the right minoxidil can be overwhelming. This evidence-based guide ranks the best minoxidil treatments for men in 2026, including prescription and over-the-counter options, based on effectiveness, safety, customization, and value. Discover wh...
By Perfect Hair Health TeamJan 16, 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...
By Perfect Hair Health TeamJan 16, 2026Oral 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 Perfect Hair Health TeamJan 16, 2026Best Topical Dutasteride: 8 Choices for 2026
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 Sophie Grice, PhDJan 13, 2026Switching From Finasteride to Dutasteride
Switching from finasteride to dutasteride is often framed as a simple upgrade or downgrade. In reality, each switch changes not only DHT suppression but also exposure patterns, timelines for results, washout dynamics, and evidence quality. This article breaks down realistic switching scenarios, oral...
By Catherine Kennedy, PhDJan 12, 2026Does Finasteride Lower Testosterone?
Finasteride’s reputation for affecting hormones has led many to assume it suppresses testosterone, but the biology is far more nuanced. In this article, we unpack what happens to testosterone when DHT is inhibited, why levels often rise instead of fall, and how this squares with the sexual side effe...
By Cassie Hopton, PhDJan 12, 2026Saw Palmetto Shampoo: Is It Effective for Hair Loss?
Saw palmetto is hailed as a natural hair loss treatment, promising hair growth and strength. It is incorporated into all manner of hair loss products, including shampoos. But is the hype backed by science? This article dissects the science of saw palmetto as a hair growth ingredient, as well as sham...
By Michael Williams, PhDJan 12, 2026Switching From Topical Minoxidil To Oral Minoxidil
Thinking about switching from topical to oral minoxidil, or back again? Changing your approach to hair loss can significantly improve your results, but changing treatment can also be a gamble that sets back progress. We break down what the evidence actually shows, when you might want to consider swi...
By Cassie Hopton, PhDJan 12, 2026Does Spironolactone Cause Weight Gain?
Spironolactone is a popular off-label treatment for female pattern hair loss, but many users worry about gaining weight while taking it. This article breaks down how the medication works, what the research actually shows about weight changes, typical dosing for hair growth, and simple strategies to ...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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