If you feel exhausted during perimenopause — even when you’re sleeping, eating well, and “doing everything right” — you’re not imagining it.
Many women describe a deep, heavy fatigue that feels different from normal tiredness. It’s not just low motivation or lack of sleep. It can show up as afternoon crashes, poor stamina, difficulty concentrating, or the feeling that your body simply doesn’t recover the way it used to.
During perimenopause, shifting estrogen and progesterone levels affect blood sugar regulation, cortisol rhythms, mitochondrial energy production, and sleep quality. The result is that your body may struggle to access energy efficiently — even if your lifestyle hasn’t changed.
Supplements won’t “fix” perimenopause, but the right ones can support the systems most commonly affected during this transition. When chosen carefully, they may help stabilise energy levels, reduce crashes, and support metabolic resilience.
Below, we’ll look at supplements commonly used to support energy and fatigue during perimenopause, how they work, and what to consider before using them.
Why Fatigue Is So Common in Perimenopause
Perimenopause is not a steady decline in hormones — it’s a period of fluctuation. Those fluctuations affect multiple systems involved in energy regulation.
Common contributors include changes in estrogen and progesterone signalling, increased cortisol sensitivity, disrupted blood sugar regulation, sleep fragmentation, and shifts in how the brain uses fuel.
As a result, many women experience fatigue even when medical tests come back “normal.”
This is not laziness, ageing, or lack of willpower. It’s physiology.
Different Types of Perimenopausal Fatigue
Understanding how your energy drops helps determine what may actually help.
Persistent fatigue despite sleeping enough
You may get 7–8 hours of sleep and still wake unrefreshed. This often points to stress physiology, poor sleep quality, or nutrient demand rather than simple sleep deprivation.
Afternoon energy crashes
The familiar 2–4pm slump is common in perimenopause and often linked to blood sugar instability or cortisol rhythm changes.
Brain fog and mental fatigue
Difficulty concentrating, word-finding issues, and mental exhaustion can feel alarming. These symptoms are common and often linked to how the brain responds to hormonal changes.
Low motivation or flat energy
This isn’t depression. It’s a lack of drive, enthusiasm, or “get-up-and-go,” often linked to neurotransmitter shifts and stress load.
Energy that fluctuates week to week
Many women notice “good weeks” and “bad weeks,” reflecting hormonal variability rather than a constant baseline.
What Actually Helps with Energy in Perimenopause
There is no single supplement that fixes perimenopausal fatigue. What tends to help is supporting the systems that regulate energy.
This often includes:
- Supporting nervous system balance
- Improving sleep quality
- Stabilising blood sugar
- Supporting mitochondrial (cellular) energy production
- Reducing stress-related energy drain
Supplements can play a role here — not as stimulants, but as supports.
How These Energy Supplements Were Chosen
These recommendations are based on how commonly specific ingredients are used for perimenopausal fatigue, how well they’re generally tolerated, and whether they support energy without overstimulation.
No supplement works for everyone. These are starting points, not prescriptions.
Supplements Commonly Used for Energy & Fatigue in Perimenopause
Magnesium (Glycinate or Threonate)
Best for: fatigue linked to stress, poor sleep quality, or nervous system overload
Magnesium supports nervous system regulation and muscle relaxation, both of which affect energy levels. When sleep quality improves and stress load decreases, daytime energy often follows.
Magnesium glycinate is commonly chosen for relaxation and sleep support, while magnesium threonate may be useful when mental fatigue or brain fog is prominent.
Some women find that magnesium supports energy indirectly by improving sleep quality and reducing nighttime stress responses. This magnesium glycinate supplement is a commonly used option.
Why some women find it helpful
- Supports relaxation rather than stimulation
- May improve sleep quality over time
- Often well tolerated
Things to consider
- Effects are usually gradual
- Not all forms are ideal for energy or sleep
Example product: Thorne Magnesium Bisglycinate
B-Complex or Targeted B Vitamins
Best for: persistent fatigue, low resilience to stress, mental exhaustion
B vitamins play a role in energy metabolism and nervous system function. Demand can increase during periods of stress, hormonal change, or poor sleep.
Some women do well with a full B-complex, while others prefer targeted forms such as B12 or B6, depending on symptoms and tolerance.
Why some women find it helpful
- Supports cellular energy production
- May help with mental fatigue and resilience
Things to consider
- Some forms can feel stimulating
- Dosing and form matter
CoQ10 (Ubiquinone or Ubiquinol)
Best for: physical fatigue, low stamina, “flat” energy
CoQ10 supports mitochondrial energy production — essentially how cells generate usable energy. It’s often explored when fatigue feels physical rather than stress-driven.
Why some women find it helpful
- Supports cellular energy
- Not a stimulant
Things to consider
- Benefits may take weeks
- Higher-quality forms matter
Because mitochondrial function plays a role in how the body produces and uses energy, some women explore CoQ10 during perimenopause to support energy levels. This CoQ10 (ubiquinol) supplement is a commonly used option and proven effective.
Adaptogens (Used Carefully)
Best for: fatigue linked to stress or burnout patterns
Adaptogens such as ashwagandha or rhodiola are sometimes used to support stress adaptation. They are not stimulants and don’t work the same way for everyone.
Why some women find them helpful
- May support stress resilience
- Can reduce energy crashes related to stress
Things to consider
- Not suitable for everyone
- Best introduced one at a time
Can You Take Energy Supplements with HRT?
Many women use supplements alongside hormone therapy without issue. Supplements support energy pathways such as sleep quality, stress regulation, and cellular energy — they do not replace hormones.
As always, introduce one supplement at a time and monitor how you feel over several days.
When Supplements Aren’t Enough
If fatigue is severe, persistent, or worsening, it’s important to rule out other contributors such as iron deficiency, thyroid dysfunction, or sleep disorders.
Supplements work best when combined with adequate nutrition, sleep support, and stress management — not as a way to override exhaustion.
Final Thoughts
Fatigue in perimenopause is common, real, and often misunderstood. It’s not a sign that you’re failing — it’s a sign that your body’s energy systems are adapting to change.
With the right combination of education, support, and patience, energy often improves over time. Supplements can be a useful part of that process when chosen thoughtfully and used consistently.
This page will continue to evolve as new evidence and strategies emerge.