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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.

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Nutrafol Growth Activator Hair Serum: A Scientific Analysis & Debunking
By Sarah King, PhD
Mar 29, 2024

Nutrafol 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...
What Happens If I Stop Using Finasteride?
By Perfect Hair Health Team
Feb 26, 2024

What 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...
Can I Make Topical Finasteride By Crushing Pills?
By Perfect Hair Health Team
Feb 15, 2023

Can I Make Topical Finasteride By Crushing Pills?

It’s possible to make homemade topical finasteride by crushing pills. However, some pills have a protective coating that may prevent them from dissolving in a topical. Under these circumstances, any coating must be removed prior to crushing, and even then, not all crushed debris will dissolve. For t...
Can a Blood Test for Finasteride Determine the Risk of Side Effects?
By Perfect Hair Health Team
Jan 15, 2023

Can a Blood Test for Finasteride Determine the Risk of Side Effects?

Can blood tests reliably determine the risk of sexual side effects from hair loss drugs? Low-quality evidence (i.e., anecdotes and observational studies) suggest, in men, that low levels of free testosterone and/or high levels of sex hormone binding globulin are correlated with higher rates of sexua...
Does Viviscal® Work? Evidence-Based Findings Reveal the Truth
By Perfect Hair Health Team
Apr 1, 2022

Does Viviscal® Work? Evidence-Based Findings Reveal the Truth

Viviscal™ is a hair loss supplement backed by numerous doctors and 12+ human studies. In this investigative article, we take a close look at Viviscal’s clinical trials, marketing efforts, and product ingredients. We even conducted a series of lab tests. Through these efforts, many issues came to lig...
Nutrafol Review: Half-Truths, Cherrypicked Data, & Misleading Study Results
By Perfect Hair Health Team
May 28, 2020

Nutrafol Review: Half-Truths, Cherrypicked Data, & Misleading Study Results

Nutrafol is a hair loss supplement praised by media, endorsed by doctors, and supported by clinical studies. At first glance, it seems like the perfect option for anyone interesting in fighting hair loss naturally. Unfortunately, during our investigation, we found that (1) Nutrafol’s 2018 clin...
Minoxidil Before and After Photos [2025] | Does It Work?
By Perfect Hair Health Team
Sep 24, 2025

Minoxidil Before and After Photos [2025] | Does It Work?

Topical minoxidil is the most widely used hair loss treatment, with decades of clinical evidence supporting its effectiveness. But while many experience stabilization and regrowth, others see little to no change. Learn why minoxidil response is so variable, how to interpret before-and-after photos, ...
Dutasteride Before and After: 10 Success Stories
By Perfect Hair Health Team
Sep 10, 2025

Dutasteride Before and After: 10 Success Stories

Oral dutasteride is one of the most powerful treatments for androgenic alopecia, offering deeper DHT suppression than finasteride. But what kind of results should you realistically expect? In this article, we break down how dutasteride works, what clinical studies actually show, how typical outcomes...
Does Topical Finasteride Work?
By Sarah King, PhD
Jul 29, 2025

Does Topical Finasteride Work?

Topical finasteride is quickly emerging as a compelling alternative to oral finasteride for treating androgenic alopecia, promising similar hair regrowth with significantly fewer systemic side effects. But does topical finasteride work? In this article, we break down how topical finasteride works, h...
Topical Minoxidil for Hair Growth: Efficacy, Safety, and How to Enhance Results
By Sarah King, PhD
Jul 16, 2025

Topical Minoxidil for Hair Growth: Efficacy, Safety, and How to Enhance Results

Topical minoxidil is the most established over-the-counter treatment for hair loss, with decades of use behind its FDA approval. But how does it actually work, and what determines whether it will work for you? In this article, we explore the science behind topical minoxidil, its strengths and limita...

Stop guessing which hair loss
treatments actually work

Instead, 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.