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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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Hims vs Keeps vs Roman: Which Hair Growth Subscription Service Wins?
By Perfect Hair Health Team
Nov 8, 2025

Hims vs Keeps vs Roman: Which Hair Growth Subscription Service Wins?

Hair growth subscription services are sprouting up everywhere online. Among them, three companies have emerged from the pack: Hims, Keeps, and Roman. Each company offers two FDA-approved hair loss treatments, as well as other add-on products (supplements, gummies, etc). In this post, the Perfect Hai...
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 Finasteride Before and After: Real Case Studies
By Perfect Hair Health Team
Oct 31, 2025

Topical Finasteride Before and After: Real Case Studies

Recent studies show that topical finasteride can significantly improve hair density and slow shedding while reducing the risk of systemic side effects seen with oral use. Learn how to interpret before-and-after results realistically, understand what typical regrowth looks like, and optimize your tre...
Oral Minoxidil: Before and After Photos [2025]
By Perfect Hair Health Team
Oct 13, 2025

Oral Minoxidil: Before and After Photos [2025]

Oral minoxidil is emerging as a popular off-label treatment for hair loss, offering an option for those who can’t use or don’t respond to topical formulas. While some achieve dramatic regrowth, most see more modest improvements. Discover why results vary, how to interpret before-and-after photos rea...
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....

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.