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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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How Long Does a Hair Transplant Last?
By Perfect Hair Health Team
Mar 5, 2022

How Long Does a Hair Transplant Last?

Fifty years ago, studies on hair transplants indicated that transplanted hairs never thin. But a 2020 study now suggests that hair transplants can thin… and even just four years post-surgery. What could explain these conflicting results, and what can we make of the new data? This article uncov...
Fecal Microbiota Transplants (FMT) & Accidental Hair Regrowth: Studies, Anecdotes, & Photos
By Perfect Hair Health Team
Feb 25, 2021

Fecal Microbiota Transplants (FMT) & Accidental Hair Regrowth: Studies, Anecdotes, & Photos

Studies suggest that fecal microbiota transplants (FMTs) can recolonize the gut microbiome, dampen autoimmunity (i.e., allergies), and even save people’s lives from C. difficile infections. Fascinatingly, some people who’ve undergone an FMT have later reported an unintended benefit: hair...
The Microbiome and Hair Loss: A Scientific Review [2021]
By Perfect Hair Health Team
Feb 23, 2021

The Microbiome and Hair Loss: A Scientific Review [2021]

Ten years ago, many researchers dismissed the possibility that gut bacteria could influence hair loss and hair growth. Today, they’re changing their tune. Research teams have now demonstrated that changes to our gut microbiome are linked to both stress-related hair loss and alopecia areata. Fa...
Helminthic Therapy (Hookworms) for Hair Loss? A Scientific Review
By Perfect Hair Health Team
Jan 22, 2021

Helminthic Therapy (Hookworms) for Hair Loss? A Scientific Review

Helminthic therapy is an experimental therapy whereby people voluntarily infect themselves with parasites known as hookworms. It may sound gruesome, but these parasites have been shown to modulate our immune systems and improve autoimmune disorders ranging from allergies to multiple sclerosis. Fasci...
Apple Cider Vinegar (ACV) for Hair Loss: Fact or Fiction?
By Perfect Hair Health Team
Nov 17, 2020

Apple Cider Vinegar (ACV) for Hair Loss: Fact or Fiction?

Health bloggers say that apple cider vinegar (ACV) is great for hair. Why? They claim that ACV is antimicrobial, so it can help fight off microorganisms linked to hair shedding: namely, Malassezia and P. acnes. However, the evidence surrounding ACV and hair loss is much more nuanced. For instance, r...
Vitamin B1 for Hair Loss: Good or Bad for Hair Loss?
By Perfect Hair Health Team
Nov 4, 2020

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...
Calcium’s Role In Hair Loss? It’s Complicated.
By Perfect Hair Health Team
Oct 20, 2020

Calcium’s Role In Hair Loss? It’s Complicated.

Calcium imbalances are linked to hair loss, with caveats. Low calcium and hair loss is seen in women with polycystic ovarian syndrome. High calcium and hair loss is reported in people with hyperparathyroidism. But in both cases, the calcium imbalances are consequences of the underlying conditions, n...
Reishi Mushroom For Hair Loss: The Problem With This DHT Blocker
By Perfect Hair Health Team
Oct 7, 2020

Reishi Mushroom For Hair Loss: The Problem With This DHT Blocker

As a hair loss treatment, reishi mushroom’s popularity seems more rooted in marketing than in scientific evidence. Studies show that reishi mushroom extract may lower DHT levels and suppress prostate growth – two things closely linked to male pattern hair loss. However, these studies were done...
Vitamin B12, Hair Loss, & Methylation: Does This Vitamin Improve Hair Growth?
By Perfect Hair Health Team
Sep 16, 2020

Vitamin B12, Hair Loss, & Methylation: Does This Vitamin Improve Hair Growth?

Does vitamin B12 help regrow hair? Mechanistically, a lot of evidence suggests yes: vitamin B12 is important for DNA synthesis, hemoglobin production, and methylation – all of which play a role in healthy hair growth. Unfortunately, studies also show that people with and without hair loss have simil...
Selenium & Hair Loss: How This Mineral Hurts (And Helps) Our Hair
By Perfect Hair Health Team
Jul 23, 2020

Selenium & Hair Loss: How This Mineral Hurts (And Helps) Our Hair

Only 15% of people worldwide are at risk of a selenium deficiency – most of whom are in rural pockets of China, Tibet, and Siberia. Moreover, only a fraction of that 15% will have a selenium deficiency severe enough to cause hair loss. Ironically, selenium is one of the most popular ingredients insi...

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.