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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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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...
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...
Grey Hair: What Causes It, And Can It Be Reversed? A Scientific Analysis
By Perfect Hair Health Team
Oct 1, 2019

Grey Hair: What Causes It, And Can It Be Reversed? A Scientific Analysis

Gray hair is believed to be caused by (1) the accumulation of free radicals, and (2) the loss of antioxidant activity in the hair follicle bulb. This leads to a loss of melanocyte stem cells and thereby melanocytes (pigment-producing cells). Once believed to be irreversible, there are now several re...
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.
Do Scalp Massages Improve Hair Loss From Androgenic Alopecia? (Our 2019 Study)
By Perfect Hair Health Team
May 14, 2019

Do Scalp Massages Improve Hair Loss From Androgenic Alopecia? (Our 2019 Study)

Scalp massages may improve androgenic alopecia (AGA) – with response rates reaching 75%+ by eight months of effort. Some people also see significant hair regrowth. However, the therapy is time-intensive and requires commitment. Diffuse thinners should confirm they have AGA before trying the massages...

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.