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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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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...
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...
Androgenic Alopecia (AGA): What Is It, What Causes It, And What Don’t We Know?
By Perfect Hair Health Team
Sep 20, 2019

Androgenic Alopecia (AGA): What Is It, What Causes It, And What Don’t We Know?

Despite decades of research, androgenic alopecia (AGA) is still a poorly understood hair loss disorder. Even still, researchers have developed effective, long-term treatments for those suffering from androgenic alopecia – particularly for those who seek treatment in its earliest of stages. This arti...
Hormonal Birth Control & Hair Loss: A Review Of The Evidence
By Perfect Hair Health Team
Sep 13, 2019

Hormonal Birth Control & Hair Loss: A Review Of The Evidence

Some hormonal birth control may (1) increase temporary hair loss when starting/stopping treatment, and (2) accelerate hair loss in women at-risk of female pattern hair loss. But not all birth control carries the same risk. Read on to educate yourself on which options might be better for your unique ...
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.
Platelet-Rich Plasma (PRP): Does It Regrow Hair? Maybe, Maybe Not.
By Perfect Hair Health Team
Jun 19, 2019

Platelet-Rich Plasma (PRP): Does It Regrow Hair? Maybe, Maybe Not.

PRP can increase hair counts by 25-40% for those with androgenic alopecia. However, it’s expensive and requires ongoing injections to maintain results. It works best as an adjunct treatment, and it might be less effective for women. Before you invest in PRP, make sure to vet your dermatologist with ...

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.