A study of 380,363 women across India looks at stress, sleep and gut health alongside hair fall patterns and how they vary by regions across India.
Mumbai: Traya Health released findings from its female hair health study covering 380,363 women across India on stress levels, sleep quality, and gut health alongside hair fall patterns. Women with hair fall show high stress, poor sleep, and gut issues. All three are higher in women with side thinning or partition widening
At Traya, we have a clear point of view on what this means. Stress, sleep, and gut health are established biological contributors to hair fall, each through a distinct and well-documented mechanism. Elevated cortisol from chronic stress shortens the hair growth phase. Poor sleep disrupts the overnight repair that follicles depend on. Gut dysfunction impairs absorption of the nutrients (iron, vitamin D, and zinc) that hair follicles need to grow.
Still, most women address hair fall from the outside with oils, shampoos, and topical treatments. This study points to what is happening internally.
Key Findings from the Study
● 95.8% of women in this study have noticeable hair fall.
● Thinning is the most common pattern (53.7%), followed by partition widening (22.1%) and side thinning (19.1%).
● 52% of women are under moderate to high stress, 38.1% are not sleeping well, and 51.7% have gut issues.
● 46.6% of women have two or more of these three, and 1 in 6 (16.4%) has all three.
● Women with side thinning or partition widening show higher stress, poorer sleep, and a heavier gut burden than women with thinning.
The Internal Health Picture
Stress
52% of women in this study are under moderate to high stress, and more than 1 in 4 (25.3%) feel tense almost every day.
Chronic stress is a known biological contributor to hair fall. Elevated cortisol, the body’s primary stress hormone, shortens the active hair growth phase, pushing follicles into the resting phase earlier than they should. Sustained stress can also disrupt hormones such as oestrogen, which extends the growth phase and protects follicle health. When these hormones are disturbed, follicles become more vulnerable to shedding.
The result builds slowly. Hair fall from stress does not arrive suddenly; it accumulates over months. And because the shift is gradual, most women never connect the stress they have been carrying to the hair fall they are now experiencing.
Sleep
38.1% of women in this study are not sleeping well.
Poor sleep is a known biological contributor to hair fall. During deep sleep, the body releases growth hormone, essential for cell renewal inside hair follicles. When sleep is consistently disrupted, this overnight repair is cut short. Follicles that do not repair fully produce thinner, weaker hair with each growth cycle. Over time, density reduces.
The hair fall that follows is slow and diffuse. Most women attribute it to stress or age. The sleep deficit building quietly over years is almost never identified as a contributing factor.
Gut
51.7% of women in this study have gut issues, such as acidity, bloating, gas, or constipation.
The gut is where the nutrients that hair follicles depend on are absorbed. When gut function is impaired, absorption of these nutrients can drop even when dietary intake is adequate. A woman can be eating well, taking supplements, and still be nutritionally deficient at the follicle level if her gut is not processing effectively. Iron deficiency in particular is one of the most common and underdiagnosed contributors to hair fall in women and is frequently missed because the gut connection is never investigated.
Saloni Anand, Co-Founder, Traya Health, said,
“Hair- fall is a sign of what is happening internally. I have spoken to thousands of women who keep switching products and supplements, waiting for a miracle instead of looking at what is happening inside their bodies. Almost none of them had ever been told that their stress, their sleep, or their gut health was connected to their hair. That conversation has been missing in India for too long. This study is our attempt to start it.”
Why All Three Together Matter
Stress, sleep, and gut health do not work in isolation. They can compound each other.
Stress disrupts sleep, and poor sleep keeps cortisol elevated, amplifying the hormonal disruption that affects hair growth. The gut and the brain signal to each other, so gut distress and stress can reinforce each other, while poor absorption starves follicles of the nutrients they need. In this study, the three often show up together. 46.6% of women have two or more of them.
The Internal Burden Is Heavier Where Hair Fall Is More Visible
Women in this study were assessed on both their hair fall pattern and their internal health markers. Women with thinning, the most common pattern, sit slightly below the national average on all three markers. Women with side thinning or partition widening sit above it on all three.
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