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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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EGCG: Does This Polyphenol Regrow Hair? | A Scientific Analysis
By Sarah King, PhD
Apr 11, 2024

EGCG: Does This Polyphenol Regrow Hair? | A Scientific Analysis

Epigallocatechin gallate (EGCG) is a popular ingredient found in hair growth supplements, serums, & topicals. Unfortunately, there’s little clinical data showing it can regrow hair in humans, and at higher doses, it might be toxic. On the one hand, in vitro studies suggest EGCG has 5-alpha...
Nourkrin® Review: Can Proteoglycans Actually Reverse Hair Loss?
By Sarah King, PhD
Apr 11, 2024

Nourkrin® Review: Can Proteoglycans Actually Reverse Hair Loss?

Nourkrin® markets its supplements as a “natural approach to hair loss”. The company differentiates itself with Marilex®: a “bioactive proteoglycan formula”. Three human studies suggest Nourkrin® products are effective at regrowing hair. Upon further investigation, each study ...
Harklinikken Extract: Uncovering The Real Evidence
By Sarah King, PhD
Apr 4, 2024

Harklinikken Extract: Uncovering The Real Evidence

Harklinikken Extract is a hair growth serum marketed to men & women with hair loss. Harklinikken keeps secret the full list of ingredients inside Extract. Of the ingredients that are disclosed, there is incredibly limited clinical evidence supporting their use in treating hair loss. Despite this...
Stinging Nettle For Hair Loss: Real vs. Perceived Benefits
By Perfect Hair Health Team
Apr 15, 2022

Stinging Nettle For Hair Loss: Real vs. Perceived Benefits

Stinging nettle is a popular natural remedy for hair loss. Unfortunately, quality studies on stinging nettle (and its effects on hair growth) are scarce. Most marketers selling stingle nettle relying almost exclusively on petri dish studies and mouse models to suggest it may have some hair-promoting...
Calcium’s Role In Hair Loss? It’s Complicated.
By Perfect Hair Health Team
Oct 20, 2020

Calcium’s Role In Hair Loss? It’s Complicated.

Calcium imbalances are linked to hair loss, with caveats. Low calcium and hair loss is seen in women with polycystic ovarian syndrome. High calcium and hair loss is reported in people with hyperparathyroidism. But in both cases, the calcium imbalances are consequences of the underlying conditions, n...
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...
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...
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.