
I've been dealing with hormonal acne lately. At 45.
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I hadn't had it in years. Then stress hit differently — and suddenly I'm breaking out along my jaw like I'm in my twenties again. Only this time, it's not just stress. It's stress interacting with hormones that are quietly shifting.
That's perimenopause. Not a dramatic announcement. Not a missed period. Just... things feel a little off, and you can't quite explain why.
I've been treating women in perimenopause for over a decade. And the social media conversation, while well-intentioned, leaves a lot of women confused — every symptom blamed on hormones, every solution pointing to HRT.
Jaw breakouts and mood shifts while your period still shows up on schedule — that's not nothing, and it's exactly what I'd want to map to your labs. Let's figure out what's driving it →
The reality is more nuanced. And knowing the difference could change how you treat what you're feeling — for the better.
💡 Forward this protocol
Perimenopause is diagnosed by your history and symptoms — not one lab test. Start here:
Track your symptoms for 4–8 weeks. Sleep quality, mood, cycle changes, hot flashes, brain fog, skin, energy. Patterns over time tell you far more than a snapshot blood draw.
Get a DUTCH test. This is the test I use in my practice to assess the full hormonal picture — it looks at estrogen, progesterone, testosterone, and their metabolic breakdown pathways, plus cortisol and adrenal hormones. It's a dried urine test you do at home, and it shows not just your hormone levels but how your body is processing them.
👉 A normal FSH does not rule out perimenopause. Serial testing over time matters more than any single result.
🤓 What to know: Your period is the last thing to change — not the first.
❌ The old assumption: Perimenopause starts when your cycle gets irregular.
That's what the standard diagnostic playbook (called STRAW+10) has historically said. But new research is reshaping this.
✅ The new reality: Symptoms often arrivebeforecycle changes.
A landmark study in The Lancet Diabetes & Endocrinology, 2025 analyzed 5,500+ women aged 40–69 and found that hot flashes and vaginal dryness can emerge well before cycles become irregular. A regular period does not rule out perimenopause.
A landmark study analyzed 5,500+ women aged 40–69 and found that hot flashes and vaginal dryness can emerge well before cycles become irregular. A regular period does not rule out perimenopause.
And it starts earlier than most women realize. Research in npj Women's Health, 2025 found more than half of women ages 30–35 were already experiencing moderate to severe symptoms — but most didn't seek treatment until decades later.
More than half of women ages 30–35 were already experiencing moderate to severe perimenopausal symptoms — but most didn't seek treatment until decades later.
💥 Perimenopause can last anywhere from five years to fifteen years. The earlier you catch it, the more options you have.
One hormone test won't tell you much.
Estrogen and FSH fluctuate wildly during perimenopause — sometimes day to day. A single blood draw is a snapshot of one moment, not a trend.
What matters is testing trends initially over 3–6 months — and then every 6 months thereafter. This gives you a way to connect the dots with your symptoms as hormones are in motion.
It might not be perimenopause at all. Or not only perimenopause.
This is where most media coverage gets it wrong.
Brain fog. Abdominal weight gain. Sleep disruption. Mood shifts. Acne. These are real perimenopause symptoms. They're also symptoms of:
thyroid dysfunction
adrenal dysregulation
blood sugar instability
gut microbiome imbalance
nutrient deficiencies (iron, B12, vitamin D)
The overlap between perimenopause and thyroid dysfunction is especially striking — both cause menstrual irregularities, mood changes, sleep disruption, and fatigue. As the European Menopause and Andropause Society has noted, the differential diagnosis is genuinely difficult.
If you assume it's always a hormone problem, you often miss something important.
💪 What to do: Assess the whole picture — then treat what's actually there.
Step 1: Know which symptoms point most clearly to perimenopause
Not all symptoms are created equal.
More specific to perimenopause:
Hot flashes and night sweats
Vaginal dryness
Cycle changes (heavier, lighter, shorter, skipped)
New joint aches that track with your cycle
Less specific — could be perimenopause OR something else:
Fatigue, brain fog, weight gain, mood changes, poor sleep, hair thinning, skin issues
If you have symptoms from the second list but not the first, start with a broader workup before assuming hormones.
Step 2: Get the right labs — and watch for trends
Ask for:
Estradiol + FSH + progesterone (timed to cycle day 21 if you're still cycling)
Total and free testosterone
TSH + free T4 + free T3 (not just TSH — you want the full thyroid picture)
Fasting insulin + fasting glucose
Ferritin, B12, vitamin D
ApoB triglycerides and Lpa
DUTCH test for hormone metabolism pathways and adrenal function
One panel is a starting point. Two or three every 3–6 months is what tells the story.
Step 3: Optimize foundations before reaching for hormones
A lot of perimenopausal symptoms respond significantly to diet exercise stress reduction and supplements — not because the hormonal shift isn't real, but because these fundamentals directly influence how your body handles that shift.
🛌 Sleep:Aim for a consistent wake time, 7 days a week — even on weekends. This single habit does more to regulate your cortisol rhythm (and downstream hormones) than most supplements. If night sweats are disrupting sleep, this is worth treating directly — topical progesterone or low-dose HRT can help.
🥩 Protein: Aim for 25–35g of protein per meal, especially breakfast. This stabilizes blood sugar, which is often swinging in perimenopause and amplifying symptoms like mood crashes and fatigue. Eggs, Greek yogurt, smoked salmon, or a quality protein shake all work.
🦠 Gut health:Take a daily probiotic withLactobacillusstrains. Your gut microbiome directly influences estrogen metabolism — a disrupted microbiome can worsen hormonal symptoms independent of what your ovaries are doing. I take Parsley Health's daily probiotic and alternate it with Seed's.
🔥 Inflammation: Cut alcohol first — even moderate intake amplifies hormonal swings and disrupts sleep architecture. Then look at ultra-processed foods and added sugar as the next lever. These are the highest-ROI dietary changes for perimenopausal symptoms.
Step 4: Consider targeted supplements — and hormones when indicated
Supplements worth trying:
Vitex (chasteberry): A randomized double-blind trial found Vitex significantly reduced total menopausal symptoms, anxiety, and hot flashes vs. placebo at 8 weeks. Best for irregular cycles and mild-moderate symptoms. Give it 8–12 weeks.
DIM (diindolylmethane): Supports healthy estrogen metabolism — particularly useful when estrogen is higher relative to progesterone.
Magnesium glycinate: 200–400mg before bed. Supports sleep, cortisol regulation, and mood.
When hormones are the answer: There are excellent options depending on your picture — low-dose progesterone (oral, topical, or vaginal), low-dose estrogen (patch, gel, or cream), testosterone. This should be personalized based on your symptoms, labs, and history.
The goal: you're not white-knuckling through the transition. You're assessing the full picture and treating what's actually driving your symptoms.
Does this resonate — the feeling that something is shifting but you can't quite name it yet? Hit reply.
💛 The Momgevity Files
I'm a doer. When there's a problem, I fly into action. I help, I fix, I solve, I overfunction, I close the gaps. Sound familiar?
It's probably part of why longevity resonates so much with me. I love putting science into action when it comes to how I look and feel — and the sense of control I get from being proactive is almost… addictive.
At the same time, I keep balance by giving myself permission. Sometimes it's pizza day, or a glass of natural wine. Sometimes I'm not going to bed at 10:30pm — it's going to be midnight because I'm out living my life, and I wouldn't trade that for anything. Occasionally I have a day where I just don't bother with supplements. Not sure what that one's about, but since it only happens once a month or so — great.
But even balance can become a finely calculated pursuit. A way of optimizing in and of itself.
In my case, my greatest work right now is actually to do less. I have a personal formula I'm working with to accomplish that:
Presence. Acceptance. Surrender. Ask for help. (I call it my PASA process 😊)
When I find myself stressed, frustrated at how a situation is going, or feeling the need to micromanage or dive in and fix something, I start by being present with it — sitting with it, observing, watching. What is it telling me? Why did I create it? What decisions did I make in the past that contributed to it?
Second, I practice accepting it. It is what it is. I don't have to be at war with what's in front of me — even just for a few minutes, even as the resistance washes through. I remember that resentment is like drinking poison and hoping someone else dies, and that expecting everyone and everything to follow my directions — like actors in a play I'm directing — is unrealistic.
Third, I practice surrender. This means abandoning the idea that I'm going to DO anything about this right now — a business issue, a disagreement with a friend or my husband, a situation with my kid. I imagine what it would look like to take no action whatsoever.
Finally, I ask for help. For me, that means asking God — non-denominational in my case — to help resolve the issue, guide me, or give me clarity. I don't give up, because "giving up" implies exasperated defeat and the resistance is still in place. I let go and hand the situation over.
This is not a natural exercise for me. It's a practice.
I share it because health is a practice — and we are all living our way to better health every day. My own health practice isn't just physical. It's mind, body, and spirit.
We can lift all the weights, take all the supplements, and hit the perfect body composition — but if we're at war with ourselves, or burning ourselves out, I don't think we're actually healthy. For me right now, optimal health means shifting into a paradigm of mental and emotional freedom through my PASA process.
I hope you give it a try. I'm finding it makes life way easier — and that feeling might give me more longevity than anything else.
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⚡️ One more thing…
If any of this resonates — the symptoms, the confusion, the feeling that something is shifting but you're not sure what — this is exactly what we do at Parsley.
If you're experiencing hot flashes or night sweats alongside brain fog and mood changes — and you're not sure whether you're looking at a hormone problem, a thyroid problem, or both — we can run estradiol, progesterone, free T3, and a DUTCH test together, and build you a personalized plan that treats what's actually driving your symptoms.
If you're experiencing hot flashes or night sweats alongside brain fog and mood changes — and you're not sure whether you're looking at a hormone problem, a thyroid problem, or both — we can run estradiol, progesterone, free T3, and a DUTCH test together, and build you a personalized plan that treats what's actually driving your symptoms. Talk to a Parsley provider →
Stay strong, stay curious, remember to breathe,
Robin
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👋 I’m Dr. Robin Berzin
I’m a mom, wife, doctor, and CEO in my 40s. My goal is to be healthier than ever – and help you do the same.
I’m also the founder of Parsley Health, the nation’s leading functional medicine clinic designed to help you reverse chronic disease and optimize your health.
Join Parsley using RBMDCREW to save $100 on your membership.
As always, this newsletter is for informational and educational purposes only and is not intended as medical advice. Always consult your healthcare provider before making any health decisions or changes to your treatment plan.
