- 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.
-
Switching From Finasteride to Dutasteride
-
Does Finasteride Lower Testosterone?
-
Saw Palmetto Shampoo: Is It Effective for Hair Loss?
-
Switching From Topical Minoxidil To Oral Minoxidil
-
Does Spironolactone Cause Weight Gain?
-
RU58841 for Hair Loss: Is It Legit?
-
Oral vs. Topical Minoxidil: What’s Better for Hair Loss?
-
Finasteride vs. Dutasteride: The Ultimate Guide
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 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 ...
By Sophie Grice, PhDJan 9, 2026RU58841 for Hair Loss: Is It Legit?
RU58841 is one of the most talked-about research chemicals in hair loss forums, and the anecdotes are often surprisingly positive. Mechanistically, it makes sense: block androgen receptors in the scalp so dihydrotestosterone (DHT) can’t trigger follicle miniaturization. But the problem is that the h...
By Michael Williams, PhDJan 9, 2026Oral vs. Topical Minoxidil: What’s Better for Hair Loss?
Oral vs topical minoxidil for hair loss: which works better, and at what cost? We break down the evidence on effectiveness, safety, dosing, and real-world tradeoffs to help you choose the right option.
By Michael Williams, PhDDec 31, 2025Finasteride vs. Dutasteride: The Ultimate Guide
Finasteride and dutasteride are the two most powerful medications available for androgenetic alopecia, but choosing between them isn’t straightforward. We break down how these drugs truly compare across efficacy, side effects, oral versus topical use, and real-world decision-making, so you can deter...
By Michael Williams, PhDDec 31, 202510 Ways to Reduce the Side Effects of Finasteride
Finasteride is one of the most effective treatments for male pattern hair loss, but side effects can happen. This evidence-based guide outlines 10 practical strategies to reduce or manage finasteride side effects, from dose and formulation adjustments to lifestyle considerations, while emphasizing w...
By Michael Williams, PhDDec 17, 2025Oral vs. Topical Dutasteride: What Studies Show
Oral dutasteride is one of the most effective treatments for androgenic alopecia, but its systemic hormone suppression raises safety concerns. Topical dutasteride is often promoted as a way to deliver similar scalp-level benefits with fewer side effects, but does the evidence support that claim? In ...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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