- 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.
-
Burdock Root For Hair Loss? A Look Into The Evidence
-
Which Vitamin Deficiences Can Cause Hair Loss?
-
Genetic Tests: A Breakthrough for Personalized Hair Loss Treatments?
-
Do Chinese Herbs Help Regrow Hair? A Look At Traditional Remedies
-
Cannabidiol (CBD) Increases Hair Counts By 246%? Not So Fast.
-
Creatine: Does It Worsen Hair Loss? It Depends On The Hair Loss Type.
-
Can Progesterone Improve Hair Regrowth?
-
CRABP2: Can This Gene Predict Regrowth From Retinoids?
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 Richard Clayton, PhDApr 19, 2024Amino Acids To Treat Hair Loss? A Small Literature Review
Amino acids are biomolecules and the building blocks of proteins. Marketers often misappropriate petri dish, animal, and small-scale human studies to suggest that the amino acids lysine, arginine, proline, & thiamine might help treat hair loss. But is this supported by clinical studies on humans...
By Sarah King, PhDApr 19, 2024Turmeric (Curcumin) For Hair Regrowth? Big Claims, Limited Data
Petri dish (i.e., in vitro) studies suggest that turmeric and its active constituent, curcumin, might decrease cyclooxygenase-2 (COX-2), inducible nitric oxide synthase (iNOS), and nuclear factor kappa beta (NF-κB). Since these pathways and proteins share pathologic overlap with certain hair loss di...
By Sarah King, PhDApr 11, 2024EGCG: Does This Polyphenol Regrow Hair? | A Scientific Analysis
Epigallocatechin gallate (EGCG) is a popular ingredient found in hair growth supplements, serums, & topicals. Unfortunately, there’s little clinical data showing it can regrow hair in humans, and at higher doses, it might be toxic. On the one hand, in vitro studies suggest EGCG has 5-alpha...
By Sarah King, PhDApr 11, 2024Is Hair Loss Treatment Lifelong? Here’s What The Data Show.
It can be daunting to think of hair loss treatments as a lifelong commitment. And for most cases of androgenic alopecia, this is true. However, starting treatment does not necessarily mean you must commit to a lifetime of treatment. Studies suggest that after stopping a hair loss treatment, hair los...
By Sarah King, PhDApr 11, 2024Nourkrin® Review: Can Proteoglycans Actually Reverse Hair Loss?
Nourkrin® markets its supplements as a “natural approach to hair loss”. The company differentiates itself with Marilex®: a “bioactive proteoglycan formula”. Three human studies suggest Nourkrin® products are effective at regrowing hair. Upon further investigation, each study ...
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 Sarah King, PhDMar 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 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 TeamSep 6, 2023Understanding Evidence Quality | How Hair Loss Companies Cheat Clinical Trials
In this guide, we’ll expose how big-brand companies in the hair loss industry cheat their clinical study results – all so they can convince hair loss sufferers to buy products that probably won’t work for them. Due to a broad definition of “hair loss” and “hair growth&#...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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