03 Nov Menopause Weight Loss Resistance Is Real: What a Fat Loss Scientist Learned When His Wife Couldn’t Lose Weight with Dr. Bill Campbell
Have you ever done everything right and watched the scale refuse to move? You’re tracking your food. You’re hitting your protein. You haven’t missed a workout in weeks. And still, your body acts like it didn’t get the memo.
If that’s you, I want you to hear this first: you are not imagining it, and you are not failing.
I know this feeling personally. For most of my adult life, I thought I had fat loss figured out. I knew the nutrition, I knew the training, and if I’m being really honest, when I heard a postmenopausal woman say she was struggling, part of me quietly assumed she just wasn’t doing the right things. Then I hit my own menopause transition and everything I knew stopped working the way it used to. I had to relearn it all.
That’s exactly why I wanted to bring Dr. Bill Campbell onto Midlife Conversations. Bill has spent more than 20 years studying fat loss and muscle building. He’s a professor and director of the Performance and Physique Enhancement Lab at the University of South Florida and a past president of the International Society of Sports Nutrition. He has published more than 200 papers. And when his own wife went through menopause and asked for his help, the strategies that worked in his lab stopped working for her.
So he did something most researchers never do. He changed the entire direction of his lab to study women like us.
Why Listen to a Man About Menopause?
I asked Bill this right away because I know many of you are thinking it. He hasn’t lived through menopause in his own body, so why should we listen?
His answer was honest. For most of his career, he studied young, metabolically healthy adults, and he regularly got messages asking why he wasn’t studying midlife women. Now that he is, some people tell him he shouldn’t be. He acknowledged that the skepticism is understandable.
But he offered two reasons his perspective matters. First, his lab is focused specifically on women who already embrace a fitness lifestyle: women who lift, who care about what they eat, and who train consistently, yet still find their bodies changing. That’s a group that has been almost entirely ignored in the research. Second, he watched his wife go through this transition and, in his words, he was reactive instead of proactive, even as a health professional. That experience is what drove the shift in his research.
And if you’d rather not take advice from a man on this topic? He said that’s okay too. I appreciated that.
What Is Menopause Weight Loss Resistance?
Here’s where this conversation got really interesting for me.
Bill has always been one of the strongest voices for the energy balance model: calories in, calories out. He still believes in it. But he’s now open to something he didn’t seriously consider before, which is why so many women in menopause are doing everything right and still not losing body fat.
He was careful to separate two very different groups of women.
The first group believes their body has stopped responding, but they aren’t tracking intake, they’re snacking more than they realize, or they’re missing workouts. For these women, he believes there’s still a lot of room to improve by tightening up nutrition and training.
The second group is the one his lab is studying now. These women are tracking their calories accurately. They know their protein numbers. They’re consistent with training. And they still aren’t losing weight even after lowering their calories.
According to Bill, this isn’t about women being unable to lose weight. It’s that the amount of calorie restriction now required seems to be far more aggressive than it was before perimenopause or postmenopause. The body appears to be working harder for less of a fat loss response. His lab is now running a two-year study to find out whether this is truly happening in this population and why.
The 1,100 Calorie Story That Changed His Thinking
Bill shared his wife’s experience, and I think so many of you will see yourselves in it.
She lifted weights her whole life. In her mid-40s, she started gaining weight. In the past, whenever she wanted to lean out, Bill would adjust her plan, bring her calories down to around 1,400 or 1,500, and she’d reliably lose body fat.
This time, nothing happened. They dropped her to 1,300, then 1,200, and eventually to 1,100 calories for several weeks while she kept training and prioritizing protein. Still no meaningful change. Looking back, he realized she was clearly in perimenopause.
For a fat loss scientist, that was a turning point. If it wasn’t working for someone with her habits and his guidance, something bigger was going on.
Why Calories Aren’t the Whole Story
I want to be clear about where I stand on calorie counting, because I think it matters for you. I don’t love strict calorie counting for the general fat loss community. People tend to overestimate what they burn and underestimate what they eat, and 100 calories of jelly beans is not the same as 100 calories of lean beef. For a lot of women, counting turns into deprivation, confusion, and sometimes disordered eating. For athletes or highly trained individuals, precision can make sense. For most women in midlife, I think understanding food quality matters far more.
Bill and I landed in a similar place on one big point: protein changes the equation.
The Protein Caveat: Can You Overeat Protein and Still Lose Fat?
This was one of the most surprising parts of our conversation.
Bill explained that the body doesn’t treat protein calories the same way it treats carbohydrates and fats. If someone overeats by 500 calories a day from ultra-processed foods like chips and cookies, those extra calories are readily stored as fat over time. If that same surplus came from a lean protein source, the body would not convert it to fat anywhere near as efficiently.
He went further. He said he can point to several randomized controlled trials in which people increased their calories from protein alone and actually lost body fat. In his review of the research on people who resistance train, he said he has not found a single study where adding extra protein calories led to fat gain. The results were either maintained body fat or reduced body fat.
In his words, protein is anabolic to muscle and appears to be catabolic to body fat. Bill offered to share these studies, so we’ll link them as soon as we have them.
How Much Protein Do You Need in Menopause?
You’ve probably seen the advice to eat your body weight in protein. Bill’s recommendation is a little more nuanced.
He suggests aiming for 0.75 to 1 gram of protein per pound of ideal body weight. Here’s why he likes that range:
- 0.75 grams per pound is the threshold where research suggests you maximize muscle building from resistance training. Eating more won’t keep building more muscle indefinitely.
- Going higher can improve body composition for some people, especially body fat.
- We need more protein as we age to get the same muscle-building response, so the upper range builds in a buffer for women in their 50s, 60s, and beyond.
- Aiming for 1 gram means that if you fall a little short, you’ll likely still land around 0.75.
And if you’re nowhere near that range right now? Bill was encouraging here. Even moving from very low protein intake to something meaningfully higher, though still below the target, offers real benefits. Progress counts.
The Best Types of Protein for Midlife Women
Bill considers animal proteins the highest quality because they provide the most essential amino acids. Think fish, chicken, eggs, and red meat. Eggs are a great option, especially with whey protein prices climbing.
Whole foods are the ideal, but he openly uses protein powders to reach his goals. His personal preference is whey protein isolate, and he mentioned two studies showing greater fat loss with that form. Beef protein powder is very similar in practice. Plant proteins like pea, soy, and rice can work too. You simply need a larger serving to get the same benefit.
I shared something personal here. I didn’t eat red meat from age 12 until about 54. Then, out of nowhere, my body started craving it, and adding it back changed my body in so many ways. We’re all so unique, and this is exactly why I always say you have to become your own health detective.
Why a Protein-Anchored Mediterranean Diet Works
One of my concerns with being overly protein focused is that some women stop eating fiber, plants, and antioxidant-rich foods. Bill’s solution is one I love: a Mediterranean-style way of eating, anchored with protein.
You get the fruits, vegetables, fiber, and olive oil that the Mediterranean diet is known for, plus more protein than it would typically include. It’s also one of the most studied eating patterns for longevity and disease prevention. Bill called it the best approach for most people, while still emphasizing that different diets can work for different people.
Strength Training for Women Over 50: What Actually Changes
Bill said something I found really validating. The principles of building muscle don’t change with age. He wouldn’t design a fundamentally different program for his 19-year-old daughter than for his wife.
What changes is recovery. Midlife women may not bounce back the same way because of hormone shifts and poor sleep, so programs need to adjust for that.
He also cleared up a common myth: you don’t need to lift extremely heavy to build muscle. What matters is lifting close to failure, meaning you stop each set when you could only do one or two more reps. That’s relative to you. Ten pounds may be challenging for one woman and forty for another. If maximum strength is your goal, you’ll need to lift heavier at some point, but again, heavy is relative to where you are.
This is why I get frustrated with the classic three sets of twelve. So many women have done the same routine for years without ever really challenging their muscles. Get in touch with your body. Notice where you feel it and whether you’re actually getting close to failure.
Hormone Therapy, Menopause Symptoms, and Body Composition
Bill was clear that hormone therapy is a decision between each woman and her healthcare provider. He also pointed out that menopause looks very different from woman to woman. Some women barely notice it. Others struggle with weight gain, fatigue, anxiety, joint pain, and depression. Most land somewhere in between. I had all of it.
His perspective is that, for women struggling with low energy, anxiety, and joint pain, hormone therapy can help bring their bodies back to a place where they’re motivated to train again and can train harder. Whether it directly builds muscle or burns fat is still debated, but feeling capable again matters.
I’m a fan of bioidentical hormones in small amounts personally. Not to turn back the clock, but to relieve symptoms. Without that support, workouts feel harder, sleep suffers, cravings increase, and it becomes so much harder to stick to the things you already know work.
His Wife’s HRT Journey
Toward the end of our conversation, Bill shared more about his wife’s experience, with her permission.
Her biggest struggles weren’t actually about weight. Her energy was depleted, her anxiety was high, and her motivation was gone. She tried to hide it from Bill and their daughters, and he believes that didn’t help either of them. His advice is not to hide what you’re going through, because the people who love you may be able to help.
What helped her most initially was a simple progesterone prescription. She later added bioidentical estradiol and, most recently, testosterone therapy, all done step by step. Interestingly, none of this caused weight loss right away. But once she moved through that turbulent transition and felt like herself again, she could finally lose weight when she dieted. During the hardest phase, she couldn’t, even with his help.
Is Creatine Worth It for Women in Menopause?
Bill is a fan. He takes it most days and has recommended it to his daughters and wife. He doesn’t believe it does anything uniquely special for menopause, but he considers it one of the safest and most researched supplements available.
At around 5 grams per day, creatine can support strength and modest muscle gains alongside resistance training. Newer research has also explored cognitive benefits, though Bill thinks this is somewhat overhyped and noted those studies typically use higher doses and often involve older adults or vegetarians. Some women notice bloating at those higher amounts.
GLP-1 Medications and Muscle Loss
I had to ask about GLP-1s because so many women in our community are using them. I’m not against them, but I worry about appetite being suppressed so much that women stop eating enough protein.
Bill admitted his first reaction to these medications wasn’t positive, since his entire career centers on diet and exercise. Over time, his view evolved. He believes many people are struggling with their health, and if these medications help, that’s a good thing. He also sees an opportunity: people who never felt comfortable in a gym may now feel ready to try.
His biggest concern is rapid, dramatic weight loss over just a few months. That’s where lean mass loss becomes a real issue, including muscle. He also referenced research showing that about half of people who start a GLP-1 are no longer taking it within a year. If someone lost significant muscle and didn’t build new habits during that time, they could end up worse off.
His advice for anyone using GLP-1s comes back to the same two priorities: protein and resistance training.
What This Means for You
If there’s one thing I want you to take from this episode, it’s this: your body has changed, and that’s not a personal failure. The strategies that worked at 35 may not work the same way at 52, and the science is finally starting to catch up.
Prioritize protein. Lift in a way that truly challenges you. Pay attention to recovery. Talk with your provider about your hormones. And give yourself grace while you figure out what works for your unique body.
The contents of the Midlife Conversations podcast is for educational and informational purposes only and is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider. Some episodes of Midlife Conversations may be sponsored by products or services discussed during the show. The host may receive compensation for such advertisements or if you purchase products through affiliate links mentioned on this podcast.
