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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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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...
Microneedling For Hair Loss: Daily, Weekly, Or Bi-Weekly?
By Perfect Hair Health Team
Jan 16, 2020

Microneedling For Hair Loss: Daily, Weekly, Or Bi-Weekly?

Clinical studies show that microneedling once every 1-3 weeks helps to regrow hair. Then again, 1-3 week intervals are the only frequencies studied for pattern hair loss. With men on hair loss forums reporting amazing results from microneedling as often as once per day, could we be missing something...
Scalp Micropigmentation: Mistakes To Avoid
By Perfect Hair Health Team
Jan 16, 2020

Scalp Micropigmentation: Mistakes To Avoid

Scalp micropigmentation is a cosmetic procedure whereby hair follicles are tattooed onto the scalp, creating the illusion of better hair density. But with high costs, unrealistic hairlines, and scalp tattoos fading over time – is the $1,000+ price tag for the procedure worth it? Maybe. Read on to le...
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...
Microneedling For Hair Loss: What’s The Best Needle Size?
By Perfect Hair Health Team
Jan 7, 2020

Microneedling For Hair Loss: What’s The Best Needle Size?

When it comes to microneedling for hair regrowth, researchers aren’t yet sure which needle size elicits the best results. In clinical studies, needle lengths of 0.6mm to 2.5mm (used once weekly or bi-weekly) have been shown to improve hair counts in men with androgenic alopecia (AGA). Even sti...
1% Or 2% Ketoconazole Shampoo For Hair Loss: Does It Matter?
By Perfect Hair Health Team
Jan 7, 2020

1% Or 2% Ketoconazole Shampoo For Hair Loss: Does It Matter?

While 1% ketoconazole is sold as an ingredient in hair loss shampoos worldwide, only 2% ketoconazole is clinically shown to improve pattern hair loss. Unfortunately, 2% ketoconazole requires a prescription. But is the 2% formulation really worth the the hassle of seeing your doctor for a prescriptio...
Oral Minoxidil: What’s The Best Dose (mg) For Men With Pattern Hair Loss?
By Perfect Hair Health Team
Jan 6, 2020

Oral Minoxidil: What’s The Best Dose (mg) For Men With Pattern Hair Loss?

Oral minoxidil improves hair growth in men with androgenic alopecia (AGA), with dosages of 0.25mg, 2.5mg, and 5.0mg showing positive effects. But the higher the dose, the higher your risk of side effects: namely, body hair growth and lower limb edema (swelling). So, which dose is best for you? While...
Caffeine For Hair Loss (AGA): Evidence & Recommendations
By Perfect Hair Health Team
Oct 3, 2019

Caffeine For Hair Loss (AGA): Evidence & Recommendations

Caffeine’s role in hair loss (and hair growth) is hotly debated. On the one hand, oral caffeine may indirectly exacerbate hair loss in those who are hyperglycemic or hypothyroid. On the other hand, topical caffeine does have efficacy as a potential hair loss intervention – at least when combin...

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.