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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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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...
Vitamin E For Hair Loss: Fact Versus Fiction (Tocopherols & Tocotrienols)
By Perfect Hair Health Team
Jul 23, 2020

Vitamin E For Hair Loss: Fact Versus Fiction (Tocopherols & Tocotrienols)

Vitamin E is an essential nutrient and antioxidant, but its usefulness to treat hair loss is incredibly limited. Studies show that vitamin E supplements can improve hair loss caused by nutrient deficiencies, and that topical vitamin E might increase local antioxidant activity in the scalps of people...
Alopecia Areata: Causes, Treatments, & Why It’s Reversible | 2020 Review
By Perfect Hair Health Team
Jul 14, 2020

Alopecia Areata: Causes, Treatments, & Why It’s Reversible | 2020 Review

Alopecia areata (AA) is an autoimmune form of hair loss that impacts 2% of people worldwide. It’s caused by an unknown driver of inflammation that disrupts hair follicle stem cells, leading to slick-bald patches and (sometimes) exclamation-mark hairs. Fascinatingly, AA can spontaneously revers...
Iodine For Hair Loss? Think Twice About Supplementing
By Perfect Hair Health Team
Jul 9, 2020

Iodine For Hair Loss? Think Twice About Supplementing

Less than 10% of Americans are iodine deficient, and even fewer have a hair loss disorder caused by low iodine intake. Ironically, iodine is a trace element featured in many top-selling hair loss supplements, allegedly to help support the thyroid. This article separates fact versus fiction about iod...
Vitamin A (Beta Carotene, Retinol) For Hair Health: Worth Avoiding?
By Perfect Hair Health Team
Jul 2, 2020

Vitamin A (Beta Carotene, Retinol) For Hair Health: Worth Avoiding?

Less than 1% of Americans are deficient in retinol (vitamin A). Even still, vitamin A and its precursors are featured in dozens of popular hair loss supplements. What most people don’t realize is that long-term vitamin A supplementation is actually associated with an increased risk of mortalit...

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.