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Scalp & Strand 101

Evidence-based education on scalp health, hair loss, and what actually works, provided by Dr. Joyce Park, board-certified dermatologist and founder of Kerativ.

A Dermatologist's Step by Step Routine for Thinning Hair
A Dermatologist's Step by Step Routine for Thinning Hair

Dealing with thinning hair can feel frustrating and overwhelming. But I want to reassure you that you’ve come to the right place!

PCOS can cause hair thinning.
PCOS and Hair Thinning: How to Tell If It Is Actually the PCOS

Diagnosed with PCOS and watching your part get wider? Scalp thinning is a real feature of PCOS, and it is less common than the facial and body hair most people associate with it. Dr. Park explains ...

Hair Loss in Women Over 40: Why It Gets Missed, and How to Get Real Help
Hair Loss in Women Over 40: Why It Gets Missed, and How to Get Real Help

Midlife hair loss is common and often dismissed. Dr. Park explains the other causes, the red flags, and how to get thinning properly evaluated.

Iron deficiency is one of the most common causes of diffuse hair shedding in women
Iron Deficiency Hair Loss: What Your Ferritin Number Actually Means

Told your bloodwork was normal but still shedding? Ferritin measures your stored iron, and it falls long before a standard anemia panel goes abnormal. Dr. Park explains what number to ask for, and ...

Scalp Massage for Hair Growth: What the Evidence Actually Shows
Scalp Massage for Hair Growth: What the Evidence Actually Shows

Seen scalp massage recommended everywhere and wondering whether it works? Dr. Park goes through evidence found by the studies, and explains how to massage your scalp without breaking hair in the pr...

Why Does Hair Shed More in Late Summer and Fall?
Why Does Hair Shed More in Late Summer and Fall?

Most people shed more hair in the fall, because of a shift their follicles quietly made back in midsummer. Dr. Park explains the timeline, and how to tell a normal seasonal shed from something that...

The Why Behind Female Pattern Thinning
The Why Behind Female Pattern Thinning

Female pattern hair loss is a gradual, genetically driven thinning that shows up as a widening part and reduced density at the crown. Dr. Park breaks down what to look for and how to treat it.

Proof Over Promises: Inside Kerativ’s Clinical Trial
Proof Over Promises: Inside Kerativ’s Clinical Trial

This is a first look at our 24-week clinical study evaluating the Kerativ Redensify Treatment Serum.

Heavy Hair Shedding? You May Have Telogen Effluvium
Heavy Hair Shedding? You May Have Telogen Effluvium

Telogen effluvium is one of the most common causes of rapid hair loss, and it is almost always temporary. Here is how to support your scalp through it.

Does Scalp Health Affect Hair Growth? Dr. Park Explains
Does Scalp Health Affect Hair Growth? Dr. Park Explains

Your scalp is living skin, and that environment shapes your hair follicles. A dermatologist explains how barrier, oil and microbiome shape hair growth.

Can Shampoo Actually Help with Hair Loss?
Can Shampoo Actually Help with Hair Loss?

A thoughtfully formulated shampoo can improve the scalp environment and support overall follicle health, which may help promote stronger, more resilient hair over time.

Male Pattern Hair Loss: Understanding Androgenetic Alopecia
Male Pattern Hair Loss: Understanding Androgenetic Alopecia

Male pattern thinning affects roughly half of men by age 50. The sooner you act, the more you can preserve.

GLP-1 Associated Hair Loss? Here's What's Happening
GLP-1 Associated Hair Loss? Here's What's Happening

Hair Shedding on Ozempic, Wegovy, Zepbound, or Mounjaro? Here Is What Is Happening in GLP-1 Associated Hair Loss

Postpartum Hair Shedding: What's Happening and How to Help
Postpartum Hair Shedding: What's Happening and How to Help

Postpartum telogen effluvium is one of the most common things I see in new mothers. Create the best environment for your follicles to recover during and after the postpartum period.

5 Healthy Hair Habits From A Dermatologist
5 Healthy Hair Habits From A Dermatologist

The hair advice I give my patients that actually makes a difference.  

Hair Thinning During Perimenopause and Menopause
Hair Thinning During Perimenopause and Menopause

As estrogen levels shift during perimenopause and drop further into menopause, many women notice their hair becoming finer. There are things you can do to help.

Minoxidil Alternatives, Ranked by a Dermatologist
Minoxidil Alternatives, Ranked by a Dermatologist

Here’s a guide to the ingredients and treatments with the strongest evidence for supporting fuller-looking hair.