CAUSES
Understanding Hair Loss: Causes and Science-Backed Solutions
January 15, 2026
8 min read
By Dr. James Kilgour, MD, Board-Certified Dermatologist

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Understanding Hair Loss: Causes and Science-Backed Solutions
January 15, 2026
By Dr. James Kilgour, MD, Board-Certified Dermatologist

This article is for you if...
Hair loss is one of the most common concerns women face as they age—yet it remains one of the most misunderstood. While it's normal to lose 50-100 hairs per day, noticeable thinning can signal deeper changes happening beneath the scalp's surface.
Whether you're experiencing wider part lines, increased shedding in the shower, or overall reduced hair density, understanding the root causes is the first step toward restoring your hair's health and fullness.
In this guide, we'll break down the science behind hair loss, explore what's actually happening at the cellular level, and discuss evidence-based solutions that work—naturally and effectively.
Unlike men, who typically experience receding hairlines, women's hair loss often presents as diffuse thinning across the entire scalp. This pattern is medically known as androgenetic alopecia or female pattern hair loss.
Understanding these factors helps you target the actual problem—not just the symptoms.
Hormones are the master regulators of hair growth. Estrogen, in particular, plays a protective role by keeping hair in the growth phase (anagen) longer. When estrogen levels drop—during menopause, postpartum, or due to conditions like PCOS—hair shifts into the shedding phase (telogen) prematurely.
At the same time, androgens like testosterone and DHT increase in relative proportion. DHT binds to receptors in hair follicles, causing them to shrink over time. This process, called miniaturization, results in shorter, finer hairs that eventually stop growing altogether.
The good news? Addressing hormonal imbalances and reducing DHT activity at the scalp level can significantly slow—and even reverse—this process.