Daylight Saving Time…Springing You Ahead in Hours (and Years)
Yes, I’m implying that the practice of DST is not only not doing us any favors, but that it is actually aging us prematurely. Whomp, whomppp.
But don’t give up hope - we’re serving up a whole HOST of actions you can easily take today to set yourself (and your hormones) up for resilience and success!
Is Daylight Saving Time Harming Your Hormones? What Every Woman Should Know
By Dr. Krystalyn Lowery, IFM-Certified Functional Medicine Practitioner | Navigate Wellness
Published: March 2026 | navigatemywellness.com/blog/daylight-savings-time-harming-hormone-health
Every spring, we collectively agree to lose an hour of sleep and then spend the next week wondering why we feel vaguely terrible. Tired, moody, craving sugar, can't focus — and somehow surprised every single time.
Here's what nobody tells you: daylight saving time isn't just an inconvenience. For women, especially those navigating hormone imbalances, fertility, or the transition into perimenopause, that one lost hour can trigger a cascade of hormonal disruption that lasts well beyond Monday morning.
Let's talk about why — and more importantly, what you can actually do about it.
How Losing One Hour of Sleep Disrupts Your Hormones
Your hormones don't run on clock time. They run on light.
Your body has an internal master clock — called the circadian rhythm — that is primarily regulated by light exposure. This clock controls the timing of nearly every hormone in your body: cortisol, melatonin, estrogen, progesterone, insulin, thyroid hormones, and more.
When you suddenly shift your sleep and wake time by an hour, you're essentially telling your hormonal system to reorganize its entire daily schedule overnight. That's not a small ask.
Here's what typically unfolds in the days after the spring time change:
1. Cortisol dysregulation Cortisol — your primary stress and wakefulness hormone — is supposed to peak within 30–45 minutes of waking (this is called the cortisol awakening response, or CAR). When your sleep is cut short or shifted, that natural morning cortisol rhythm gets blunted or mistimed. The result? You wake up feeling unrested, reach for caffeine on an empty stomach (which spikes cortisol further), and spend the rest of the day riding an energy rollercoaster.
2. Blood sugar instability Sleep deprivation — even just one night of poor sleep — significantly impairs your cells' ability to respond to insulin. That means your blood sugar runs higher, crashes harder, and your cravings for sugar and simple carbs go through the roof. This isn't a willpower issue. It's biology.
And here's the part that really frustrates me as a functional medicine practitioner: uncontrolled blood sugar then further disrupts your sleep quality. You're now in a negative feedback loop — poor sleep worsens blood sugar, unstable blood sugar worsens sleep.
3. Melatonin suppression Melatonin is not just your sleepy hormone. It's also one of your body's most powerful antioxidants. It's synthesized from serotonin in response to darkness — which means any artificial light exposure after sunset (hi, phone screens and overhead lights) can delay or blunt melatonin production. During the week of DST, when your body is already recalibrating to the new light schedule, protecting your melatonin is absolutely critical.
4. The downstream effect on estrogen and progesterone Chronically elevated cortisol and disrupted sleep both suppress sex hormone production. Your body essentially triage's resources — when it perceives stress (and sleep deprivation is absolutely a stressor), it prioritizes cortisol over estrogen and progesterone. For women trying to conceive, managing PMS, or already dealing with hormonal imbalances, this matters.
What You Can Do Right Now: A Practical DST Survival Guide for Women & Their Hormones
The good news: this is highly addressable. Here's what I actually recommend to my patients — and do myself.
Protect Your Circadian Rhythm
Get morning light within 30 minutes of waking — go outside, no sunglasses. Even 5–10 minutes of natural light anchors your cortisol awakening response and sets your circadian clock for the day.
Catch the sunset if you can. Evening light signals your body to begin winding down. This isn't woo — it's photobiology.
Start shifting your bedtime now. Go to bed 10–15 minutes earlier starting tonight, and wake up 10–15 minutes earlier too. Spread the adjustment out so Monday morning isn't a shock to your system.
Ditch the Blue Light — For Real This Time
Most people know blue light is bad before bed. Most people also don't actually do much about it.
Here's my favorite workaround: your iPhone has a free built-in accessibility feature that applies a deep amber filter to your entire screen — way more effective than Night Shift alone. It takes 90 seconds to set up and it genuinely makes a difference, especially this week.
👉 [Watch my YouTube video: How to Set Up the Amber Screen Filter on Your iPhone]
If you have blue light blocking glasses, dig them out of whatever drawer they're living in and actually wear them this week. Your melatonin will thank you.
Support Your Blood Sugar
Unstable blood sugar is one of the biggest drivers of hormone havoc — and sleep deprivation makes it dramatically worse. This weekend especially:
Eat breakfast. Don't skip it, don't push it to noon. Your cortisol is already elevated in the morning; skipping food just makes that worse.
Don't have coffee on an empty stomach. Caffeine on an empty stomach significantly spikes cortisol. Have something with protein and fat first — even something small.
Lead with protein, fat, and fiber at every meal. This is always good advice, but especially this week. Think eggs, avocado, full-fat Greek yogurt, nuts. Keep snacks packed and ready so you're not making decisions when you're tired and crashing.
Meal prep this weekend. Future you — the one who's running on one less hour of sleep on Monday — will be so grateful.
Skip the Wine This Weekend
I say this with love: this is not the weekend to disrupt your sleep further with alcohol.
Alcohol is a neurotoxin and a stressor. It may feel like it helps you relax, but it actually fragments your sleep architecture, suppresses REM sleep, and raises your cortisol overnight. It depletes you — especially after 30, and especially in women.
Instead: mocktails, sparkling water with a fancy glass, a walk outside, a sunset. Protect your sleep this weekend like it's your job. Because honestly, for your hormones, it kind of is.
Add Creatine — Especially This Week
This one surprises people, but hear me out.
Creatine is one of the most studied supplements in existence — and it's not just for athletes. Your brain cells run on ATP (cellular energy), and sleep deprivation tanks your brain's ability to produce it efficiently. Creatine helps replenish ATP stores, and research shows it can significantly offset the cognitive impairment from sleep deprivation.
For women specifically, we tend to get very little creatine from diet alone (it's found mainly in red meat). I take 3–5g daily year-round. Tasteless, affordable, and genuinely one of my top picks for women's brain and hormone health.
I love Designs for Health or Momentous Creapure — both third-party tested and high quality.
Don't Overlook Red Light Therapy
If you have a red light device, this is a great week to use it consistently. Red light therapy supports mitochondrial function (your cells' energy production), circadian rhythm regulation, and has been shown to support cortisol balance. Even 10–12 minutes in the morning makes a difference.
The Bottom Line
Daylight saving time is a small but real stressor on your hormonal system — and for women dealing with hormone imbalances, fertility challenges, or the early signs of perimenopause, that stress compounds quickly.
But you're not powerless. Light, sleep, blood sugar, and stress management are four of the most powerful levers you have for hormone health — and this week is a perfect opportunity to pull all of them intentionally.
Your hormones are listening. Let's give them something good to work with. 💛
Dr. Krystalyn Lowery is a functional medicine practitioner and the founder of Navigate Wellness, specializing in women's hormone health. She works with women in their childbearing years and approaching perimenopause who are looking for root-cause answers to their hormone challenges.
Ready to go deeper? [Book a discovery call] or [learn more about the Root Cause Hormone Healing Program.]
Tags: daylight saving time hormones, sleep and hormone health, cortisol and sleep deprivation, blood sugar and hormones, women's hormone health, circadian rhythm women, how to prepare for daylight saving time, functional medicine women's health, creatine for women, melatonin and hormones
Meta description: Losing an hour of sleep this weekend? Functional medicine practitioner Dr. K breaks down exactly how daylight saving time disrupts your hormones — and the practical steps you can take right now to protect your energy, sleep, and hormonal health.
