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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 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...
Scarring Alopecias: What Makes Them Unique (And Reversible)
By Perfect Hair Health Team
Jul 2, 2020

Scarring Alopecias: What Makes Them Unique (And Reversible)

Scarring alopecias were once thought to be irreversible. Now, studies are proving just the opposite. Case reports are showing that people with scarring alopecias have experienced complete hair regrowth, and from changes as simple as quitting sunscreen. Read on to learn the science behind these scarr...
Biotin For Hair Loss: Why This Supplement Is Overhyped & Oversold
By Perfect Hair Health Team
Jun 1, 2020

Biotin For Hair Loss: Why This Supplement Is Overhyped & Oversold

When it comes to hair loss supplements, biotin is king. Unfortunately, biotin’s popularity resides more so in clever marketing than in sound science. Studies have shown that biotin levels don’t differ between people with and without hair loss. Moreover, in the U.S., biotin deficiencies s...
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...
Oral Minoxidil For Female Hair Loss: How To Avoid Hypertrichosis (Unwanted Body Hair Growth)
By Perfect Hair Health Team
Jan 17, 2020

Oral Minoxidil For Female Hair Loss: How To Avoid Hypertrichosis (Unwanted Body Hair Growth)

Oral minoxidil improves hair loss in women, but at the expense of unwanted body hair growth. Fortunately, there is a way to leverage oral minoxidil’s hair-promoting effects and without much body hair growth: combine it with spironolactone. This article reviews the evidence on oral minoxidil fo...

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.