- 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 [2026]
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Minoxidil Before and After Photos [2026] | Does It Work?
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10 Best Ketoconazole Shampoos in 2026
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Happy Head Review: 5 Concerns With The Brand
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Which Hormones Cause Hair Loss in Females?
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Does Zepbound Cause Hair Loss?
-
Does Wegovy Cause Hair Loss?
-
Strut Health Review: 5 Things to Consider Before Purchasing
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 Catherine Kennedy, PhDMar 10, 2026Keeps Review: The Truth About Their Hair Loss Treatments?
Keeps is a telehealth brand offering science-backed hair loss treatments. In this review article, we’ll break down what Keeps offers, the real science behind offerings such as finasteride and minoxidil, and if the evidence aligns with (or contradicts) any marketing claims....
By Sophie Grice, PhDMar 3, 20267 Best Oils for Hair Growth
Natural oils are widely marketed as hair-growth remedies. In this article, we cut through the hype and rank the most popular oils based on evidence quality, regrowth potential, safety profile, and real-world relevance. We’ll also explain common industry pitfalls, offer practical dosing and formulati...
By Dr. Michael WilliamsFeb 13, 2026Hims Hair Growth Reviews: The Pros, Cons, and Real Results
Hims has quickly become one of the most recognizable telehealth brands for men’s health, and its hair loss lineup is no exception. But do the sleek branding and promises of “personalized” care translate into real, sustainable regrowth? In this in-depth review, we break down Hims’ most popular hair g...
By Perfect Hair Health TeamFeb 12, 2026Topical Finasteride Before and After: Real Case Studies
Recent studies show that topical finasteride can significantly improve hair density and slow shedding while reducing the risk of systemic side effects seen with oral use. Learn how to interpret before-and-after results realistically, understand what typical regrowth looks like, and optimize your tre...
By Perfect Hair Health TeamFeb 8, 2026How to Reduce the Risk of Finasteride Side Effects
Finasteride is an FDA-approved drug for androgenic alopecia. For a portion of men using finasteride, side effects can occur – most often in the form of sexual side effects, enlarged male breasts, lowered sperm counts, and erectile dysfunction. Fortunately, there are several strategies that can be em...
By Cassie Hopton, PhDFeb 3, 202610 Best DHT-Blocking Shampoos
DHT-blocking shampoos are widely available, but do they actually work? While blocking DHT is a proven strategy for treating androgenic alopecia, most evidence comes from oral medications and leave-on topicals, not rinse-off shampoos. In this article, we separate science from marketing by breaking do...
By Sophie Grice, PhDJan 27, 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 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 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...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