Fasting in Menopause: Lose Weight & Gain Energy

“I feel like my body is fighting against me.”

That’s what one of my clients, a 54-year-old woman, told me in frustration. “No matter what I do—eating less, exercising more—I just keep gaining weight. I feel tired all the time, and the things that used to work for me in my 30s and 40s just don’t anymore. I tried fasting, but I felt awful—lightheaded, weak, and moody. What am I doing wrong?”

If this sounds familiar, you’re not alone. Fasting in menopause can feel different from fasting at any other stage of life. The strategies that worked before—cutting calories, increasing exercise—no longer seem to have the same impact. And while many people swear by intermittent fasting, some menopausal women struggle, feeling weak, irritable, or unable to lose weight.

But here’s the truth: fasting in menopause can work for you—it just needs to be done differently.

Why Does Fasting Feel Harder in Midlife?

At this stage of life, many women experience persistently high cortisol levels—the body’s main stress hormone. And let’s be honest, this age is full of challenges. You might be:

• Caring for aging parents—managing their health, medications, and daily needs.
• Still supporting your children—teenagers going through their own struggles, or even adult children who need financial or emotional support.
• Balancing a career—whether you’re at the peak of your profession, considering a career shift, or planning for retirement.
• Managing financial stress—saving for retirement, covering children’s education, or handling unexpected expenses.
• Dealing with relationship changes—navigating an evolving marriage, divorce, or the emotional shift of an empty nest.
• Struggling with body changes—weight gain, slower metabolism, sleep disturbances, and hormonal fluctuations.
• Questioning personal identity—after years of putting others first, wondering Who am I beyond being a mother, daughter, wife, or professional?

What Happens During Fasting?

When fasting, the body switches from using glucose from food to fat from fat stores for energy.

1️⃣ 0-4 Hours: Uses energy from the last meal; insulin is high.
2️⃣ 4-12 Hours: Blood sugar drops; glycogen (stored glucose) is used.
3️⃣ 12-16 Hours: Glycogen depletes; fat-burning begins.
4️⃣ 16+ Hours: Fat becomes the main fuel; autophagy cleans damaged cells.

The Stress-Cortisol-Insulin Cycle That Blocks Fat Loss

Here’s the key issue:

🚨 If stress is high, cortisol is high.

⬇️

🚨 If cortisol is high, insulin is high.

⬇️

🚨 If insulin is high, fat burning cannot happen.

This means that no matter how much you try to fast or cut calories, your body physically cannot access fat stores for energy. Instead, it stays in “storage mode,” holding onto weight rather than burning it.

This is why many women in this age group struggle to lose weight despite their best efforts. Their bodies are locked in a cycle where stress keeps insulin high, and high insulin prevents fat loss.

Benefits of Fasting (When Done Right)

Once stress, sleep, and insulin levels are managed, fasting can offer powerful health benefits for peri- and postmenopausal women.

1. Improved Metabolic Health

• Helps lower insulin resistance, reducing the risk of type 2 diabetes.
• Supports better blood sugar control and glucose metabolism.

2. Weight Loss & Fat Burning

• Fasting encourages the body to use stored fat for energy after 12-15 hours of fasting.
• The first fat stores burned are those around the abdomen, organs, and muscles—the most harmful types linked to inflammation and metabolic disease.

3. Cellular Repair & Autophagy

• After 16+ hours of fasting, the body enters autophagy—a natural cellular cleanup process.
• Autophagy helps remove damaged cells and proteins, reducing the risk of chronic diseases and possibly slowing aging.

4. Reduced Inflammation

• Fasting lowers inflammation, a major driver of metabolic issues and age-related diseases.
• Can help reduce joint pain and improve digestion.

5. Enhanced Mental Clarity & Brain Health

• Fasting may improve focus, memory, and protect against neurodegenerative diseases like Alzheimer’s.
• Reduces brain fog, a common complaint in menopausal women.

The Problem with Jumping Straight into Fasting

Now, imagine a woman who is already under high stress and has high insulin levels (even if she doesn’t realize it). If she suddenly starts fasting without preparation, her body won’t be able to access its fat stores for energy because of the high insulin. With no food coming in and no stored fat being used, she might feel:

• Dizzy
• Weak
• Fatigued
• Irritable

This is why some women struggle with fasting—it’s not that fasting is bad, but rather the body isn’t prepared for it yet.

How Do You Know If You Might Struggle with Fasting in Menopause?

If you experience the following, fasting may be more challenging for you:

✔ Feeling “hangry” (hungry + angry) and irritable when skipping meals
✔ Craving sugary or carb-heavy foods
✔ Feeling lightheaded, dizzy, or weak when going too long without food
✔ Getting strong hunger pangs that feel like an emergency
✔ Experiencing extreme fatigue mid-morning or afternoon
✔ Relying on caffeine to get through the day
✔ Waking up at 3 AM feeling wired or hungry
✔ Feeling more anxious or stressed when not eating
✔ Binge eating or overeating after breaking a fast
✔ Having a history of thyroid or adrenal issues

If these symptoms sound familiar, don’t worry! It doesn’t mean fasting won’t work for you—it just means your body needs more preparation before jumping in.

Why Are You Fasting? Define Your Purpose

Before starting fasting, ask yourself: Why am I doing this?

Fasting has different benefits depending on the goal:

• Weight loss – Helps burn fat and improve insulin sensitivity.
• Managing chronic disease – Supports conditions like type 2 diabetes, hypertension, and heart disease.
• Gut health – Gives the digestive system a break, reducing bloating and improving microbiome balance.
• Mental clarity and brain health – Can enhance focus and reduce the risk of neurodegenerative diseases like Alzheimer’s.
• Cancer prevention or support – Some studies suggest fasting may help slow cancer growth by reducing glucose availability to cancer cells.
• Longevity and anti-aging – Promotes cellular repair through autophagy, where the body removes damaged cells and regenerates new ones.

➡ However, fasting should be done for the right reasons. Too much fasting, especially for the wrong reasons, can be harmful.

Why Is Excessive Fasting in Menopause, Dangerous?

One of the biggest risks of excessive fasting in menopause is muscle loss (sarcopenia).

🚨 Losing muscle at this age is highly detrimental. Here’s why:

1. Muscle is the body’s metabolic engine – The more muscle you have, the better your metabolism. Less muscle = slower metabolism and more fat storage.
2. Muscle is the biggest storage for glucose – With less muscle, excess glucose has nowhere to go, leading to insulin resistance and fat gain.
3. Muscle loss leads to frailty – Loss of strength makes daily activities harder, increasing the risk of falls and fractures.
4. Low muscle mass increases disease risk – Poor muscle health is linked to higher risks of diabetes, cardiovascular disease, and even cognitive decline.
5. Once lost, muscle is harder to rebuild – Especially after menopause, muscle rebuilding becomes slower due to declining estrogen levels.

This is why fasting for too long, too often, or without enough protein intake can be counterproductive. If you are already of normal to low body weight, excessive fasting can lead to unnecessary muscle breakdown.

How to Make Fasting in Menopause, Work for You

If you recognize yourself in the above signs, don’t force fasting—prepare your body first.

1. Focus on Sleep & Stress First

• Poor sleep and chronic stress increase cortisol and insulin, making fasting harder.
• Try deep breathing, meditation, or gentle yoga.
• Prioritize good sleep habits (reduce screen time, create a bedtime routine).

2. Balance Blood Sugar Before Fasting

• Reduce processed carbs and sugar.
• Eat protein, healthy fats, and fiber to stabilize insulin levels.
• Gradually increase the time between meals instead of jumping into long fasts.

3. Avoid Muscle Loss While Fasting

• Prioritize protein intake—aim for at least 80-100g of protein per day.
• Incorporate resistance training (weights, bodyweight exercises, or bands) at least twice a week to maintain muscle mass.

4. Ease Into Fasting

• Start with 12-hour fasts and slowly increase to 14-16 hours over time.
• Hydrate well and include electrolytes to prevent dizziness.
• Pay attention to how you feel—adjust if needed.

What Works for Me

Fasting is not a one-size-fits-all approach. Over time, I have refined my own fasting strategy to fit my schedule and health needs:

✔ A 24-hour fast once weekly (Monday, a working day) – Helps me reset if I’ve indulged over the weekend and is convenient since I don’t have to worry about preparing meals.

✔ 18:6 fasting on two other working days – I eat within a 6-hour window, which helps maintain insulin sensitivity and gut health.

✔ Three meals per day on the other days of the week – This ensures I maintain muscle mass and get adequate nutrition.

✔ The longest fast I’ve ever done was 96 hours – After a month in Italy eating higher carbs, I felt uncomfortable and wanted to reset digestion and metabolism. However, I don’t do frequent long fasts as I lose too much weight.

The key is finding a fasting schedule that supports your goals without harming your metabolism or muscle mass.

Learn How to FAST Right

If you want to get fasting right and make it effortless, I highly recommend our 6-week, self-guided Learn How to FAST Right online course. This comprehensive program explains:

✅ The science behind fasting
✅ How to transition smoothly into fasting
✅ How to avoid common mistakes
✅ How to fast without effort and for maximum benefit

This course takes you step by step, so by the end, fasting feels natural and sustainable—not forced or overwhelming.

If you’re ready to fast the right way, this course will set you up for success!