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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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Vitamin B1 for Hair Loss: Good or Bad for Hair Loss?
By Perfect Hair Health Team
Nov 8, 2025

Vitamin B1 for Hair Loss: Good or Bad for Hair Loss?

Vitamin B1 – also known as thiamine (or thiamin) – is part of the B-complex of vitamins. In mouse models, severe vitamin B1 deficiencies lead to rapid weight loss, neurological decline, and hair loss. However, thiamine repletion studies (as well as studies on humans) suggest that this hair loss seem...
Nutrafol Review: Half-Truths, Cherrypicked Data, & Misleading Study Results
By Perfect Hair Health Team
Nov 8, 2025

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...
Microneedling For Hair Loss: What’s The Best Needle Size?
By Perfect Hair Health Team
Nov 8, 2025

Microneedling For Hair Loss: What’s The Best Needle Size?

When it comes to microneedling for hair regrowth, researchers aren’t yet sure which needle size elicits the best results. In clinical studies, needle lengths of 0.6mm to 2.5mm (used once weekly or bi-weekly) have been shown to improve hair counts in men with androgenic alopecia (AGA). Even sti...
Oral Minoxidil: What’s The Best Dose (mg) For Men With Pattern Hair Loss?
By Perfect Hair Health Team
Nov 8, 2025

Oral Minoxidil: What’s The Best Dose (mg) For Men With Pattern Hair Loss?

Oral minoxidil improves hair growth in men with androgenic alopecia (AGA), with dosages of 0.25mg, 2.5mg, and 5.0mg showing positive effects. But the higher the dose, the higher your risk of side effects: namely, body hair growth and lower limb edema (swelling). So, which dose is best for you? While...
Rosemary Oil For Hair Loss? Not So Fast… (See Photos)
By Perfect Hair Health Team
Nov 8, 2025

Rosemary Oil For Hair Loss? Not So Fast… (See Photos)

In 2015, a clinical study showed that rosemary oil improved pattern hair loss and was just as effective as 2% minoxidil (Rogaine®). Since then, interest in rosemary oil has exploded – with many hair loss sufferers switching from Rogaine® to rosemary as a more natural solution. But is this a good mov...
5 Natural DHT Blockers… But Should You Use Them?
By Perfect Hair Health Team
Nov 4, 2025

5 Natural DHT Blockers… But Should You Use Them?

Natural DHT blockers are popular among hair loss sufferers who want to lower DHT without the use of drugs. Unfortunately, most natural DHT reducers lack enough DHT-reducing capabilities to regrow hair. This article separates fact from fiction to reveal the best (and worst) natural DHT blockers for p...
Topical Dutasteride Before and After: 10 Successes
By Perfect Hair Health Team
Sep 24, 2025

Topical Dutasteride Before and After: 10 Successes

Recent clinical data show that topical dutasteride offers promising hair regrowth and reduced side effects, but results vary widely, and more research is needed. Learn how to interpret anecdotal stories, set realistic goals, and combine therapies for the best outcomes....
Does Topical Dutasteride Work?
By Sarah King, PhD
Sep 18, 2025

Does Topical Dutasteride Work?

Topical dutasteride is gaining attention as a potent alternative to oral dutasteride (and finasteride) in treating androgenic alopecia, aiming to deliver robust DHT suppression at the scalp with fewer systemic side effects. But does topical dutasteride work? In this article, we break down how topica...
Where to Buy Topical Finasteride?
By Sarah King, PhD
Sep 16, 2025

Where to Buy Topical Finasteride?

Topical finasteride is gaining traction as a lower-risk alternative to oral finasteride, especially for those concerned about systemic side effects. In the U.S., providers like Ulo and Strut stand out for customization and lab-tested purity. Canadian options include Xyon Health and Essential Clinic,...
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...

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.