- 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.
- Topical Finasteride Calculator
- Interactive Guide: What Causes Hair Loss?
- Free Guide: Standardized Scalp Massages
- 7-Day Hair Loss Email Course
- Ingredients Database
- Interactive Guide: Hair Loss Disorders
- Treatment Guides
- Product Lab Tests: Purity & Potency
- Evidence Quality Masterclass
- More
Articles100+ free articles.
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Cannabidiol (CBD) Increases Hair Counts By 246%? Not So Fast.
-
Creatine: Does It Worsen Hair Loss? It Depends On The Hair Loss Type.
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Can Progesterone Improve Hair Regrowth?
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CRABP2: Can This Gene Predict Regrowth From Retinoids?
-
BTD: Can This Gene Predict Regrowth From Biotin?
-
COL1A1: Can This Gene Predict Regrowth From Collagen Support?
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2dDR For Hair Loss: What Do We Know So Far About This Sugar?
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CYP19A1: Can This Gene Predict Regrowth From Hormone Therapy?
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
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 Rob EnglishApr 11, 2024I Am Experiencing Side Effects From Ketoconazole. What Should I Do?
Ketoconazole shampoo, a anti-fungal medication, is widely used to treat dandruff and seborrheic dermatitis. It is also sometimes used as an off-label treatment for androgenic alopecia and telogen effluvium. Some users experience side effects such as scalp itchiness & dryness. But with a bit of t...
By Sarah King, PhDApr 11, 2024Does Ketoconazole Work for Women?
Several clinical studies support the effectiveness of ketoconazole, an anti-fungal treatment, in treating androgenic alopecia and telogen effluvium. However, the evidence for ketoconazole in women is limited. One study found that daily ketoconazole use can facilitate hair growth in women with patter...
By Sarah King, PhDApr 4, 2024Niostem: Can This Device Stimulate Hair Regrowth? Analyzing Marketing Claims Vs. Reality
Niostem claims their device achieves hair regrowth through electrotrichogenesis & produces better results than finasteride or minoxidil – without “nasty side effects”. Our investigation found many of Niostem’s claims to be unsubstantiated. (1) Niostem has not conducted any comp...
By Sarah King, PhDApr 4, 2024Harklinikken Extract: Uncovering The Real Evidence
Harklinikken Extract is a hair growth serum marketed to men & women with hair loss. Harklinikken keeps secret the full list of ingredients inside Extract. Of the ingredients that are disclosed, there is incredibly limited clinical evidence supporting their use in treating hair loss. Despite this...
By Perfect Hair Health TeamMar 29, 2024BioSil® Supplement: Can Silica & Choline Really Regrow Hair? (Scientific Deep-Dive)
BioSil® is a popular hair health supplement. According to its manufacturers, BioSil® is supported by two clinical studies & the inclusion of two ingredients: silica & choline. But can this supplement actually regrow hair? Unfortunately, BioSil®’s clinical trials did not explicitly incl...
By Perfect Hair Health TeamMar 29, 2024Redensyl, Capixyl, & Procapil (RCP) For Natural Hair Regrowth? (Scientific Review)
Redensyl, Capixyl, & Procapil (RCP) are 3 trademarked blends constituting 12+ natural ingredients marketed for hair regrowth. RCP rose in popularity after a landmark clinical study suggested that topical RCP could regrow hair better than 5% minoxidil. Our investigation into the clinical data on ...
By Dan SheridanMar 29, 2024Nutrafol Growth Activator Hair Serum: A Scientific Analysis & Debunking
Nutrafol’s Growth Activator Hair Serum is marketed as a hair growth topical to men and women. Its key differentiating point: ashwagandha exosomes, which Nutrafol says helps support cell renewal to activate visibly thicker hair. Nutrafol references a study claiming that 87% of serum users saw h...
By Dan SheridanMar 29, 2024Are Low-Potency Corticosteroids Safe for Use as Hair Loss Treatments?
Many telehealth brands are adding in low-potency corticosteroids – i.e., 1% hydrocortisone or 0.01% fluocinolone – to their prescription topicals for hair regrowth. They also recommend men & women use their topicals twice-daily, forever. The problem? Corticosteroids can thin the skin, and there&...
By Perfect Hair Health TeamFeb 26, 2024What Happens If I Stop Using Finasteride?
After quitting finasteride, two-year clinical studies suggest that hair loss resumes 1-3 months after withdrawal. Within 3-12 months of quitting, hair counts return to where they were prior to starting the drug, and hair loss continues. But what about those who quit finasteride temporarily? What abo...
By Perfect Hair Health TeamFeb 26, 2024Topical Finasteride: How Can I Minimize My Partner’s Exposure To The Drug?
Some topical finasteride users worry about inadvertently exposing their partner or kids to the drug – particularly if household members often touch their hair or use the same pillowcases. In most scenarios, indirect exposure to topical finasteride is not a cause for concern – particularly if users g...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