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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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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...
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...
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...
Diffuse Thinning: Causes, Implications, And Steps For Regrowth (See Photos)
By Perfect Hair Health Team
Jan 10, 2020

Diffuse Thinning: Causes, Implications, And Steps For Regrowth (See Photos)

Diffuse thinning is a presentation of hair loss linked to androgenic alopecia, stress, and a variety of chronic conditions. If you’re dealing with diffuse hair loss, this article reveals its common causes, and a step-by-step guide toward identifying which causes are most relevant to you. The g...
Saw Palmetto: Is It As Effective As Finasteride?
By Perfect Hair Health Team
Jan 9, 2020

Saw Palmetto: Is It As Effective As Finasteride?

Saw palmetto is less effective than finasteride for treating pattern hair loss – with clinical studies showing lower response rates and regrowth rates in men taking 320mg of saw palmetto versus 1mg of finasteride daily. However, saw palmetto is also associated with fewer sexual side effects. This me...
Saw Palmetto: A Hair Growth Miracle? Mixed Evidence, Mixed Results
By Perfect Hair Health Team
Aug 2, 2019

Saw Palmetto: A Hair Growth Miracle? Mixed Evidence, Mixed Results

Saw palmetto reduces DHT levels and may improve hair loss, with one study citing hair regrowth in 38% of men. However, the extract is not as effective as finasteride. Saw palmetto is also unregulated, so there are no best practices for harvesting, manufacturing, or extraction. Consequently, its DHT-...
The Best Diet For Hair Loss? Here’s What Everyone Gets Wrong
By Perfect Hair Health Team
Jul 17, 2019

The Best Diet For Hair Loss? Here’s What Everyone Gets Wrong

The diet-hair loss connection is complicated. A bad diet is more closely linked to telogen effluvium (a form of hair loss) than it is pattern hair loss (androgenic alopecia). Contrary to popular belief, the best foods and diets to stop hair loss will vary for everyone. Here’s why.

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.