How Stress Affects Your Hair, According to a Dermatologist

Stress, nutritional gaps, disrupted sleep, hormonal shifts—when these are off, your hair is often the first place it shows up. Dr. Heather Woolery-Lloyd, a double-board-certified dermatologist and Chief Medical Advisor at Nutrafol, calls it a mirror: a visible reflection of what’s happening beneath the surface.

In a new episode of Radio Headspace, recorded as part of Nutrafol’s Stress Awareness Month collaboration with Headspace, Dr. Woolery-Lloyd explains why hair thinning is almost never caused by just one thing, how small daily habits shape your hair from the inside out, and what she tells her patients when the whole thing feels overwhelming.

Dr. Woolery-Lloyd is direct about this: to the body, hair growth is not an essential function. When resources are stretched by nutritional gaps, long-term stress, or hormonal shifts, the body prioritizes other systems first. Hair is among the lower priorities.

Take insufficient amounts of vitamin D as an example. The body redirects that nutrient toward other organs, and hair health takes a back seat. The same dynamic plays out with stress: long-term elevated cortisol signals the body into a state of high demand, and hair growth gets deprioritized.

That’s why, in her practice, stress is one of the first questions she asks when a patient comes in with hair thinning. “Even if someone’s hair is thinning for another reason, stress will make that even worse,” she says. Hair thinning causes stress, which can feed more hair thinning—a cycle she actively works to interrupt with her patients.

Hair thinning rarely has a single source. Dr. Woolery-Lloyd walks through the most common key root causes she sees in her practice:

If you’ve noticed more shedding than usual, her advice is straightforward: Don’t wait. “If you personally believe you’re shedding too much hair, please go see a dermatologist,” she says. “Early action is really predictive of the best results.”

One of the most memorable aspects of this conversation is how accessible Dr. Woolery-Lloyd’s recommendations are. There’s no dramatic lifestyle overhaul required.

Dr. Woolery-Lloyd calls walking one of the most straightforward things almost everyone can do. A 10-minute walk after dinner or morning light exposure before you start your day can lower the body’s stress response and support your circadian rhythm. For patients who feel overwhelmed, she starts with the smallest possible ask: walk around your block twice. Build from there.

Dr. Woolery-Lloyd calls sleep the unsung hero of wellness—and admits she’s personally working on it. The body repairs and regulates during sleep, and one of the most effective things you can do to support it is build a consistent nighttime routine. A repeatable wind-down signals to your brain that rest is coming in the same way a bedtime routine works for children.

For stress management, she recommends guided meditation apps like Headspace because they remove the pressure of figuring out what to do. Following a guided session is accessible in a way that open-ended meditation often isn’t, especially for people who find the practice intimidating.

When addressing key root causes of hair thinning, Dr. Woolery-Lloyd recommends Nutrafol Hair Growth Nutraceuticals in her practice. What she values most is the whole-body approach: Rather than targeting a single cause of hair thinning, Nutrafol Hair Growth Nutraceuticals are designed to address multiple key root causes simultaneously.

Specific ingredients she highlights from the conversation that can be found in some of these formulas:

Nutrafol Hair Growth Nutraceuticals are also NSF Certified for Sport^®—the gold standard in third-party certification for supplements. All formulas are verified that the label matches the contents, and rigorous tests are performed for contaminants and banned substances.

Hair health is a marathon. With Nutrafol Hair Growth Nutraceuticals, it typically takes about 3 months to notice reduced shedding, and around 6 months to see significant improvements in hair growth. Patience, she says, is part of the process.

Dr. Woolery-Lloyd closes the conversation with something that feels more like a permission slip than advice: It’s okay to be frustrated. Hair thinning affects quality of life—the research supports that—and you don’t have to minimize it or feel like you “shouldn’t” be worried about it.⁸

Her message is practical: Start with one thing. Walk outside. Build a sleep routine. Look at your nutrition. And consider a Hair Growth Nutraceutical that addresses the multiple factors that may be driving your thinning.

Dr. Heather Woolery-Lloyd’s conversation with Radio Headspace covers even more ground than what’s here—including her personal experience discovering her own insufficient amounts of vitamin D, the lifestyle shifts she recommends to her own patients, and why addressing hair thinning is always a marathon, not a race.

Listen on Radio Headspace →

Can stress cause hair thinning?

Yes. Stress is one of the most common key root causes of hair thinning. Long-term elevated cortisol can disrupt the hair growth cycle, and it tends to amplify other contributing causes as well.

How does hair reflect internal health?

To the body, hair growth is not an essential function. When dealing with nutritional gaps, long-term stress, or hormonal shifts, the body prioritizes other systems first. What you see in your hair often reflects what’s happening internally.

What are common key root causes of hair thinning?

According to Dr. Woolery-Lloyd, common key root causes include stress, nutritional gaps (especially vitamin D), hormonal changes, aging, and metabolism.

How long does it take to see results from a Hair Growth Nutraceutical?

Typically, about 3 months to notice reduced shedding and around 6 months to see significant improvements in hair growth. Hair health is a long-term process.

What daily habits support hair health?

Dr. Woolery-Lloyd recommends walking outside (even just 10 minutes daily), building a consistent sleep routine, using guided meditation for stress management, and considering a Nutrafol Hair Growth Nutraceutical that addresses multiple key root causes of hair thinning. To support your whole-body wellness, a complimentary Headspace subscription is included with your subscription of Nutrafol Hair Growth Nutraceuticals on Nutrafol.com.