Inside: Perimenopause doesn’t have to be a mystery. Here’s how to recognize the early signs, understand what’s happening beneath the surface, and support your body naturally through the transition.
You may have heard about perimenopause and thought — “Wait, could that be me?” When does perimenopause start? Maybe your cycles are changing, sleep is unpredictable, or your moods seem to swing more than usual. It’s so confusing, because no one really teaches us what this phase actually looks like.
For me the confusion started around the age of 38. I was dealing with fatigue, heavy and painful periods, mood swings and digestive upset worse than usual. Naturally, I thought — “It must be perimenopause.” But after doing some functional testing on myself, I learned that the symptoms I was experiencing were actually due to some underlying imbalances — including gut dysbiosis (an imbalance of healthy and unhealthy bacteria), low iron, vitamin D deficiency, sluggish detox pathways and poor B vitamin activation due to MTHFR and COMT gene mutations. As soon as I addressed these root causes, my energy and cycling balanced out again.
That experience taught me a very important thing: Perimenopause is not always the problem — although it can be the trigger that lets you know when something is already out of balance.
So… When Does Perimenopause Actually Start?
Perimenopause usually starts in your late 30s or early to mid 40s, as estrogen and progesterone levels change and your ovaries start preparing for the natural transition to menopause. It can last anywhere from four to ten years, depending on genetics, stress and lifestyle issues [1].
During this time, hormone levels do not decline in a straight line. Estrogen tends to go up and down unpredictably, while progesterone — your calming, sleep-supporting hormone — gradually decreases. That hormonal rollercoaster can make you feel great one week and foggy, anxious, or fatigued the next.
If your periods are starting to change a bit—maybe they’re arriving slightly earlier or later, or the flow is heavier or lighter—that’s often the first sign that your body is entering perimenopause.
Common Perimenopause Symptoms
Not all change means something is wrong. Many are just signs your body is recalibrating. Here are some common and typically natural changes:
✅ Periods that shift slightly in timing or flow
✅ Occasional hot flashes or night sweats
✅ Tender breasts before your period
✅ Mild mood swings or irritability
✅ Restless sleep or early morning waking
✅ Slight weight changes
✅ Lower or fluctuating libido
✅ Mild fatigue or brain fog
✅ Feeling “wired but tired”
These changes may come and go over the course of several years before menopause (12 months without a period), officially begins. While it can be frustrating, these changes are your body trying to find a new hormonal rhythm.
When to Look Deeper
Perimenopause should not leave you feeling like your body has completely turned against you. If your symptoms are severe or constant, it is time to dig deeper— because sometimes what seems like “normal perimenopause” is actually a deeper imbalance.
Contact your healthcare provider if you notice:
🚩 Periods that are extremely heavy (soaking pads or tampons hourly, or lasting more than 8 days)
🚩 Skipped cycles for several months before age 45
🚩 Persistent exhaustion or brain fog
🚩 Intense mood swings, anxiety, or depression
🚩 Hair thinning, dry skin, or brittle nails
🚩 Weight gain despite healthy habits
🚩 Low libido or painful intercourse
🚩 Poor sleep every night
🚩 Feeling cold all the time
These may indicate problems like thyroid dysfunction, nutrient deficiencies, adrenal fatigue, gut dysbiosis or blood sugars imbalances — all of which can be found and treated through testing [2][3].
If you haven’t already, check out my blog on exhaustion in perimenopause — it describes how low energy may sometimes arise from greater cellular problems, not just hormonal shifts.
How Functional Testing Can Help
If your labs come back “normal” and you still don’t feel right, that’s when functional testing begins to shine! Tests such as:
- Comprehensive Hormone Testing — reveals your true estrogen, progesterone, and cortisol rhythm across your cycle.
- Gut Health Testing — checks for bacterial imbalances, inflammation, and poor nutrient absorption that can worsen PMS and fatigue.
- Organic Acid Testing— maps how well your body is producing energy, detoxifying, and processing neurotransmitters for mood and focus [4].
Functional tests take the guesswork out of what is going on — whether it’s low progesterone, sluggish detox, or depleted mitochondria (the tiny little “powerhouses” that make your energy).
You can find out more about gut health testing and what insight it can bring you in my blog about the best stool testing kits.
With the right nourishment and lifestyle support, perimenopause can be a powerful season of renewal.
How To Support the Transition Naturally
You don’t have to just “ride it out.” Supporting your body through the perimenopause transition makes all the difference.
Here are a few ways to support your hormones, mood and energy to stay as steady as possible:
1. Eat to Balance Blood Sugar
Every meal should include protein + fiber + healthy fats to enable balanced blood sugar — and mood. Try foods such as:
- Avocado, eggs, wild salmon, chickpeas, quinoa, vegetables and nuts.
Avoid skipping meals and using caffeine to push through exhaustion — this will just spike cortisol and worsen hormonal swings.
2. Rebuild Nutrient Stores
Your body exhausts nutrient stores at a higher rate in times of stress and hormonal transition.
Focus your attention on:
- Magnesium, zinc, B vitamins, vitamin D, iron, omega 3 fats [5].
These assist energy, mood, thyroid function and hormonal detox.
3. Support Gut and Liver Detox Function
Your gut and liver process estrogen and clear toxins, so if they are sluggish, it will worsen hormonal symptoms.
- Eat cruciferous veggies (broccoli, cauliflower, kale)
- Stay hydrated
- Cut back on alcohol and ultra-processed foods
- Consider gentle liver-supporting teas like dandelion or ginger
4. Calm the Nervous System
Your nervous system plays a huge role in hormonal balance.
Consider daily nervous system resets such as gentle yoga, breathing exercises, stretching, journaling, or walking outdoors.
5. Track Your Cycle
Even simple cycle tracking (mood, tiredness, flow and sleep) will help you see patterns and better understand what your body is trying to tell you.
Low energy, brain fog, or feeling run-down can be signs your iron needs support. This free guide and meal plan share simple, food-first ways to support iron absorption, steady your energy, and rebuild your iron levels naturally.
Final Thoughts
Perimenopause isn’t something to fix — it’s something to understand and support. It’s your body shifting gears and it’s your chance to explore, learn, dig deeper and rebuild your foundation for your next chapter.
If you have symptoms which feel beyond “normal,” don’t ignore them. Small steps such as balanced meals, stress management and nutrient replenishment can make a big difference.
✨ Ready for more guidance?
🌱 Grab my free guide, 5 Ways to Support Iron Levels Naturally, to learn simple steps to support iron levels, calm your nervous system and reduce the crashes that drain you. Check out all the free resources in the freebies library.
🔍 Or, if you’re ready to dig into testing and a step-by-step plan for your hormones, gut, and energy — check out my 3-month program, The Calm & Clear Method, where we uncover root causes and rebuild your energy from the inside out.
🎥 If you’d rather watch than read, you can find my free 15-minute mini masterclass on my Work With Me page — I walk you through exactly how I help women calm cravings, balance their nervous system, and feel like themselves again.
You don’t have to figure this out alone. With the right support, the start of perimenopause and beyond can feel less like chaos — and more like clarity.
Be well,
Alysha Breanne
More Wellness Reads:
Alysha Breanne, CHN, CFNP — Certified Holistic and Functional Nutritionist helping women with iron deficiency, low ferritin, fatigue, and absorption issues restore steady energy using personalized nutrition and testing when needed.