- 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?
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BTD: Can This Gene Predict Regrowth From Biotin?
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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 Sarah King, PhDAug 21, 2024PTGES2: Can This Gene Predict Regrowth from Minoxidil?
The PTGES2 gene encodes the enzyme prostaglandin E synthase 2, which is crucial for converting prostaglandin H2 to prostaglandin E2 (PGE2). This enzyme plays a significant role in various physiological processes, including inflammation and hair growth. Research has indicated that an SNP in the PTGES...
By Sarah King, PhDAug 21, 2024PGTFR: Can This Gene Predict Regrowth From PGF2a Analogs?
Can your genes predict the effectiveness of PGF2α analogs for hair loss? The PGFTR gene, encoding the prostaglandin F2 alpha (PGF2α) receptor, is a potential target in hair loss treatment. Prostaglandin F2α and its analogs like latanoprost have been shown to stimulate hair follicle growth, making PG...
By Ben Fletcher, PhDAug 20, 2024IGF1R: Can This Gene Predict Regrowth From IGF-1?
The IGF1R gene encodes the insulin-like growth factor-1 receptor, which is integral to the IGF signaling pathway, particularly in processes like growth and development. Variations in the IGF1R gene, such as the rs2229765 polymorphism, have been linked to differences in circulating IGF-1 levels, with...
By Ben Fletcher, PhDAug 6, 2024SRD5A1 & 2: Can These Genes Predict Regrowth From 5-Alpha-Reductase Inhibitors?
Can your genes predict the effectiveness of 5α-reductase inhibitors for hair loss? The SRD5A1 and SRD5A2 genes, encoding type I and type II 5α-reductase respectively, are central to DHT production, a key factor in the pathogenesis of androgenic alopecia. Genetic testing companies suggest certain SR5...
By Sarah King, PhDJul 16, 2024GPR44: Can This Gene Predict Hair Regrowth From PGD2 Inhibitors?
Can your genes predict the effectiveness of PGD2 inhibitors for hair loss? The GPR44 gene, encoding the prostaglandin D2 receptor (DP2), is a potential target in hair loss treatment. Elevated levels of prostaglandin D2 (PGD2) have been linked to hair growth inhibition, making GPR44 a key player. How...
By Sarah King, PhDJul 16, 2024SULT1A1: Can This Gene Predict Hair Regrowth From Minoxidil? | The Evidence
Can your genes predict minoxidil effectiveness? The SULT1A1 gene, which encodes sulfotransferase, might hold the key, at least according to gene testing companies. SULT1a1 codes for an enzyme that activates minoxidil, a common hair loss treatment. While some studies suggest certain SULT1A1 variants ...
By Sarah King, PhDMay 31, 2024Microneedling the Scalp: Does it Cause Scarring?
Can repeated microneedling on the scalp cause scarring? There aren’t yet long-term studies answering this question. On the one hand, microneedling increases neocollagenesis (i.e., the formation of new collagen, or skin tissue). On the other hand, studies show that microneedling-induced collage...
By Sarah King, PhDMay 9, 2024Pyrilutamide (KX-826): A Promising Future Treatment For Hair Loss?
Pyrilutamide, also known as KX-826, is an anti-androgen topical currently being tested for the treatment of androgenic alopecia (AGA). Initial studies suggested that pyrilutamide might help reverse hair loss. However, larger-scale clinical studies have found no significant differences in hair regrow...
By Sarah King, PhDMay 9, 2024HMI-115: What We Know So Far
HMI-115 lowers prolactin levels and is currently in clinical trials for the treatment of androgenic alopecia (AGA). Internal, non-peer-reviewed research suggests that HMI-115 may promote hair regrowth in monkeys. Anecdotes from its phase I trials in humans imply that HMI-115 may also regrow hair in ...
By Sarah King, PhDMay 2, 2024Green Tea: Is It An Effective Hair Loss Treatment?
Green tea extract contains epigallocatechin gallate (EGCG) and many other compounds that allegedly improve hair growth. On the one hand, in vitro studies suggest that EGCG might inhibit hair follicle damage. On the other hand, human studies do not yet exist showing that green tea – as a supplement o...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