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Her Midlife Rx
  • Home
  • Her Midlife Blog
  • Hormones
    • why am I gaining weight?
    • at-home hormone testing
  • Beauty
    • skincare routines
    • best skincare products
    • the midlife skincare hub
  • Supplements
    • best supplements 2026
    • Provitalize vs MenoLabs
    • Equelle Review
  • About
  • Gallery

Achieve Optimal Wellness with Her Midlife RX

why am i gaining weight in perimenopause?

If you’re in your late 30s, 40s, or early 50s and suddenly gaining weight—especially around your midsection—you’re not imagining things.


You may be eating the same way.


You may be exercising more.


And yet, the scale keeps creeping up.


This is one of the most common (and frustrating) experiences of perimenopause—and it has very little to do with willpower.


Let’s break down what’s actually happening in your body, why traditional advice often fails during this phase of life, and what does help.

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What is perimenopause and when does it start?

At Her Midlife RX, we believe that true wellness is about more than just Perimenopause is the transitional phase before menopause when hormone levels begin to fluctuate unpredictably.


For many women, this starts:


  • in the late 30s to early 40s
     
  • years before periods stop
     
  • long before anyone mentions the word “menopause”
     

During this time, estrogen, progesterone, cortisol, and insulin no longer follow stable patterns—and that directly affects how your body stores fat.

Frequently Asked Questions

Here are the answers to our biggest questions about weight gain in perimenopause

Estrogen Becomes Erratic (Not Just “Low”)

Estrogen doesn’t simply decline—it swings.

These fluctuations:

  • reduce insulin sensitivity 
  • encourage fat storage (especially abdominal fat) 
  • make blood sugar harder to regulate

This is why weight often shifts from hips and thighs to the belly.


As estrogen fluctuates, cortisol has a stronger effect.

High or chronically elevated cortisol can:

  • promote belly fat storage 
  • increase cravings 
  • disrupt sleep 
  • blunt fat loss even with exercise 

Many women are unknowingly stuck in a stress–fat–stress loop.


Yes and the reasons are multi-factorial but start with sleep:

Perimenopause often affects sleep long before hot flashes appear.

Poor sleep:

  • raises cortisol 
  • worsens insulin resistance 
  • increases hunger hormones 

Even one bad night can impact your cortisol levels and weight management the next day


No! This is not a healthy or well-rounded approach to the problem.

Many women respond to weight gain by:

  • cutting calories further 
  • increasing cardio 
  • skipping meals

In perimenopause, this can worsen the problem by:

  • increasing cortisol 
  • further reducing muscle mass 
  • slowing metabolic adaptability

What worked before may now feel like it’s working against you.


Hello

what actually helps with weight loss during perimenopause?

Stop guessing and understand your hormones. Shift the focus from weight loss to metabolic stability. Stop calorie counting and work on building lean muscle. We've put together the information and resources to guide you.

Find out more

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