- 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.
-
Hims Hair Growth Reviews: The Pros, Cons, and Real Results
-
Topical Finasteride Before and After: Real Case Studies
-
How to Reduce the Risk of Finasteride Side Effects
-
10 Best DHT-Blocking Shampoos
-
Best Minoxidil for Men: Top Picks for 2026
-
7 Best Oils for Hair Growth
-
Switching From Finasteride to Dutasteride
-
Best Minoxidil for Women: Top 6 Brands of 2026
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 Sarah King, PhDDec 4, 2025Topical Finasteride Side Effects: What to Know
Topical finasteride is marketed as a “safer, localized” alternative to the oral pill, but how true is that? In this article, we break down what the science actually shows about systemic absorption, sexual and mood-related side effects, real-world user reports, and why responses vary so widely. Learn...
By Sarah King, PhDDec 3, 2025Low-Dose Topical Dutasteride: Better Than Oral Finasteride? (New Study & Photos)
A new clinical trial claims that low-dose topical dutasteride outperforms oral finasteride for hair regrowth, a result so surprising that it contradicts nearly everything we’ve seen in 5+ years of real-world member data. In this deep dive, we break down what we previously knew about topical dutaster...
By Perfect Hair Health TeamNov 29, 2025Topical Finasteride: The Best Dosage for Maximizing Regrowth and Minimizing Side Effects
Since earning FDA approval in 1997, Finasteride has been one of the most widely used hair loss drugs. To avoid potential sexual side effects, many opt for topical finasteride in hopes of isolating the drug’s DHT-reducing effects on the scalp. However, at certain doses, topical finasteride can enter ...
By Michael Williams, PhDNov 27, 2025Blueprint Haircare Stack: Product Review
Bryan Johnson’s Blueprint Haircare Stack promises hair longevity rooted in science, but how much does that translate into real-world results? In this review, we unpack the ingredients, scrutinize the evidence, compare it to proven alternatives, and ask whether the Haircare Stack offers meaningful be...
By Michael Williams, PhDNov 25, 2025Natural 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 TeamNov 17, 2025Oral Dutasteride for Hair Loss: Results, Side Effects, Dosing & How It Compares to Finasteride
Dutasteride is one of the most powerful treatments for male pattern hair loss, offering faster and greater regrowth than finasteride with comparable or even lower rates of sexual side effects. This comprehensive guide explains how dutasteride works, how it compares to finasteride in clinical trials,...
By Perfect Hair Health TeamNov 17, 2025Topical & Mesotherapy Dutasteride for Hair Loss: Evidence, Dosing, Safety
Dutasteride isn’t just oral anymore; emerging research shows that topical and mesotherapy dutasteride can significantly improve androgenic alopecia while keeping most of the action localized to the scalp. This guide breaks down the science, realistic regrowth expectations, dosing ranges, and how the...
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....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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