- 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.
-
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?
-
BTD: Can This Gene Predict Regrowth From Biotin?
-
COL1A1: Can This Gene Predict Regrowth From Collagen Support?
-
2dDR For Hair Loss: What Do We Know So Far About This Sugar?
-
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, PhDApr 25, 2024Inositol: A Sugar That Supports Hair Growth? | Clinical Study Analysis
Inositol (in the form of myo-inositol or D-chiro-inositol) is found in many hair growth supplements. Clinical studies suggest inositol might normalize androgen levels in women with polycystic ovarian syndrome (PCOS). For these reasons, marketers often claim inositol can help regrow hair for those wi...
By Sarah King, PhDApr 25, 2024Pea Sprout Extract: A Hair Growth Miracle? Little Evidence, Lots Of Hype
What does the science say about pea sprout extract and its ability to combat hair loss? On the on hand, pea sprouts might improve hair growth by reducing non-growing hairs and increasing hair density. On the other hand, the studies supporting pea sprout extract face methodological concerns, such as ...
By Sarah King, PhDApr 25, 2024Zinc Supplements For Hair Loss: A Hard Look Into The Science
Zinc is a popular trace element found in hair growth supplements. Animal studies suggest that zinc is required for healthy hair cycling. Human studies suggest that zinc deficiencies can cause hair loss from telogen effluvium. One study found that zinc sulfate might help with non-descript hair loss i...
By Sarah King, PhDApr 25, 2024Japanese Knotweed For Hair Loss: A Scientific Analysis
Japanese knotweed contains resveratrol and apigenin. In vitro studies suggest these compounds have antioxidant, anti-inflammatory, and anti-aging properties. Marketers claim these compounds support hair regrowth. So can Japanese knotweed regrow hair? In this article, we review the scientific literat...
By Perfect Hair Health TeamApr 25, 2024Why Am I Shedding After Microneedling?
Temporary hair shedding is commonly reported after men & women start hair loss treatments like minoxidil. But is temporary hair shedding also normal when starting microneedling? On the one hand, microneedling induces acute inflammation. A little inflammation might benefit hair growth, while too ...
By Sarah King, PhDApr 24, 2024Ritlecitinib (Litfulo™) For Alopecia Areata: Benefits, Risks, & Hair Growth Outcomes
In a recent milestone, a drug called ritlecitinib (brand name Litfulo™) was approved for treating alopecia areata (AA) in adolescents and adults. But is there high quality evidence supporting ritlecitinib? What are the long-term safety risks? And if it works, does this (relatively) new medication re...
By Sarah King, PhDApr 19, 2024Pump BioGro™: A Topical For Hair Regrowth? | Scientific Analysis
Pump BioGro™ is a topical product marketed by Pump Haircare. Its makers claim that Pump BioGro™ is clinically proven to reduce hair shedding and promote hair growth by inhibiting fibroblast growth factor 5 (FGF5) – a growth factor that Pump Haircare suggests might negatively impact hair cycling. Dur...
By Sarah King, PhDApr 19, 2024What Happens If I Stop Microneedling?
In general, treatments for hair loss are only effective as long as they are continued. However, limited data suggests that microneedling may exert its effects up to six months post-treatment (with or without minoxidil). In this article, we will dive into the research behind how long the positive hai...
By Sarah King, PhDApr 19, 2024Reparex (For Grey Hair): Does It Really Reverse Greying? | Scientific Analysis
Reparex’s Against Grey Hair claims to “restore hair color naturally from the inside out”. During our company investigation, we found discrepancies between Reparex’s marketing claims and the mechanisms governing the graying process. We also found duplicative before-after photo...
By Sarah King, PhDApr 19, 2024Vitamin C (Ascorbic Acid) For Hair Regrowth: Fact vs. Fiction
Vitamin C, also known as ascorbic acid, is a water-soluble vitamin that is naturally present in citrus fruits. Because humans lack an enzyme called gulonolactone oxidase, vitamin C must be taken up through the diet. The majority of evidence concerning vitamin C and its potential for hair growth is f...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