Perimenopause Weight Gain: Why Eating Less Isn't Always the Answer
If you’re in perimenopause or menopause and you’ve tried eating less, cutting calories and experimenting with intermittent fasting, but you haven’t seen the number on the scale move, there may be more going on than simply needing to “eat less.”
Today, we’re unpacking some of the reasons weight loss can become more challenging in your 40s and 50s—and why the answer isn’t always as simple as “eat less and move more.”
Hormone Fluctuations: How to Finally Get Answers
I know you’ve heard it before: your hormones are fluctuating during these years of significant change.
And while that can sometimes feel like a frustrating excuse for everything that is happening to your body, there is actually a lot of truth behind it — but there is also a lot you can do about it.
The menopause transition can influence where your body stores fat, with a tendency toward more abdominal and visceral fat. Changes in estrogen, progesterone, sleep, stress and activity can all interact with your metabolism and body composition.
This is why I don’t believe in simply telling a woman, “You just need to eat less.”
We need to look at the whole picture.
There is a whole symphony of hormones and metabolic factors that can influence your weight, mood, sleep, appetite and energy. This is where functional testing can be helpful. A comprehensive assessment, which may include a DUTCH hormone test when appropriate, can give us more information about what is happening beneath the surface so we can stop guessing and start creating a more personalized plan.
We talk more about root cause solutions inside our Thrive Through Perimenopause Guide here.
Insulin: The Missing Piece of the Weight-Loss Puzzle
You don’t need to have type 2 diabetes to have problems with insulin sensitivity.
Insulin resistance occurs when your cells become less responsive to insulin, meaning your body needs to produce more of it to help move glucose from your bloodstream into your cells.
And this matters for weight and metabolic health.
Visceral fat is closely associated with insulin resistance, and the perimenopause and menopause transition can be a time when abdominal fat begins to increase.
But here’s something important: insulin resistance isn’t only caused by eating sugar. Poor sleep, inactivity, excess visceral fat, an overall poor-quality diet and other metabolic factors can all play a role.
And sometimes, women are actually under-eating during the day—skimping on protein, eating very little at meals and trying to “be good”—only to find themselves ravenous for sugar and carbohydrates later in the evening.
The goal isn’t to fear carbohydrates or obsess over insulin. It’s to build meals that support steady blood sugar, adequate nutrition and satiety.
Muscle Loss: Your Metabolism's Best Friend
Building muscle during perimenopause and menopause is a hot topic online for good reason.
As we age, maintaining muscle becomes increasingly important. Muscle is one of the body's major sites for glucose disposal, which means having more metabolically active muscle can support insulin sensitivity.
Research in postmenopausal women has found that resistance training can improve insulin action, and exercise training has been shown to improve insulin sensitivity and increase lean mass even after menopause.
And this is where strength training becomes especially important if your goal is fat loss.
In one study of postmenopausal women undergoing calorie restriction, the women who added resistance training preserved muscle mass, while the calorie-restriction-only group lost muscle. Both groups lost a similar amount of weight.
In other words, the goal shouldn't simply be to make the number on the scale smaller.
We want to lose excess fat while protecting the muscle underneath it.
Why Aggressive Caloric Restriction Can Backfire in Perimenopause
Diet culture has led women astray for decades.
We’ve been taught that if the scale isn’t moving, the answer must be to eat even less and exercise even more.
While calorie restriction can help you lose weight, the problem is when weight loss becomes the only goal and we ignore what happens to muscle, protein intake, energy levels and overall health.
Intermittent fasting isn't magic for weight loss. When people lose weight with time-restricted eating, much of that effect can come from naturally eating fewer calories. And if restricting your eating window causes you to skip meals and eat less protein, you may inadvertently make it harder to preserve muscle.
So instead of “eat as little as possible,” think:
Eat enough protein.
Build muscle.
Prioritize nutrient-dense foods.
Support healthy blood sugar.
Move your body.
Sleep and recover.
Perimenopause may change your metabolism and body composition, but it doesn't mean you're destined to gain weight or that nothing can be done.
Sometimes, you simply need to stop guessing and start looking at what is actually happening beneath the surface.
Ready to get some answers?
If you’re struggling with weight gain, fatigue, blood sugar swings or changes in your body composition during perimenopause, a personalized assessment can help us look at the bigger picture.
Book an appointment with one of our functional nutrition practitioners to discuss whether the DUTCH test or other functional testing may be appropriate for you.
Asher Kleiber
Registered Holistic Nutritionist
If you’re in perimenopause or menopause and you’ve tried eating less, cutting calories and experimenting with intermittent fasting, but you haven’t seen the number on the scale move, there may be more going on than simply needing to “eat less.”