Can't Lose Weight After 40? Your Testosterone Labs Might Be Wrong
You're lifting weights and eat adequate protein. You sleep as well as you can and have even cut back on alcohol, cleaned up your diet, and added more steps to your day. And still, your body isn't responding the way it used to.
If this is you, I need you to hear something: you're probably not doing it wrong. Your labs might just be telling you an incomplete story.
I spent years frustrated by this exact situation. Working out harder than most people half my age, doing everything the experts said, and watching my body composition go in the wrong direction anyway. It was not until I started asking better questions at my hormone appointments that everything finally started to click.
Listen to the full podcast about testosterone, labs you should get run, SHBG and the connection to body composition here.
You Are Doing Everything Right and Nothing Is Working
For women over 40, the standard advice, eat less, move more, track your macros, just does not always work the way it used to. And the reason is almost never discipline or effort. It is usually biology.
Hormones run the show. They control how your body stores fat, builds muscle, recovers from workouts, and uses energy. When they are out of balance, you can do everything right and still feel like your body is working against you.
Testosterone is a big part of that picture. Not just for men. For us too.
Most women know estrogen and progesterone decline in perimenopause and menopause. What most women do not know is that testosterone declines just as significantly, and low testosterone makes it nearly impossible to build or maintain muscle, burn stored body fat, sustain workout energy, and recover properly between sessions.
But here is where it gets complicated. Your labs can show a perfectly normal testosterone level while your body is still not getting enough of it to actually work with. That is the piece most doctors miss entirely.
The Lab Number Your Doctor Is Probably Not Checking
When your doctor tests your testosterone, they almost certainly check your total testosterone. That number tells you how much testosterone exists in your bloodstream. It does not tell you how much your body can actually use.
Here is the distinction that changed everything for me.
Most of the testosterone in your blood is bound to a protein called SHBG, sex hormone binding globulin. Bound testosterone is inactive. It cannot build your muscle, fuel your workout, or support your metabolism. Only free testosterone, the unbound portion, is biologically active and available for your body to use.
Think of it this way. Total testosterone is the money in your bank account. Free testosterone is the cash in your pocket. SHBG is the bank teller who decides how much cash you actually get to walk out with. You can have a great bank balance and still not be able to buy anything if the teller is locking most of it away.
If your SHBG is high, your free testosterone is low, even if your total looks normal. And most standard lab panels do not check SHBG or free testosterone at all.
What I Found When I Finally Asked the Right Questions
Earlier this year I went back to my clinician feeling like something was off. I had returned to serious training after taking recovery time following my facelift last November. Months had passed. I was consistent in the gym, tracking progressive overload, eating enough protein, sleeping reasonably well. But I could not get stronger. My energy was flat. The motivation I used to have to lift heavy just was not there.
When we ran a complete panel, my total testosterone was within normal range. My free testosterone was low. My SHBG was high. For years, we had been looking at only one of those three numbers.
Once we understood the full picture, we adjusted my testosterone delivery. I switched from monthly injections to a daily testosterone cream. The injections had been giving me high energy for the first week and then a slow crash for the rest of the month. The cream gave me consistent, stable levels every day, which is much closer to how your body naturally produces testosterone.
Within weeks my energy stabilized. By March I was getting stronger. By spring I could feel my body finally responding to the work I was putting in. My body composition started shifting in a way it had not in a long time.
Was it just the testosterone adjustment? No. Sleep, progressive overload, protein, and stress management all matter and they are all connected. But getting my hormones right was what made everything else possible. I could not build muscle without the energy to lift heavy. I could not sustain the energy without balanced hormones. It all flows from the same source.
Why High SHBG Is So Common in Women Over 40
SHBG levels naturally rise with age. Several factors push them even higher: years of hormonal birth control, chronic stress, poor sleep, toxin exposure, and genetics all play a role.
This means a woman can have SHBG levels that are quietly locking away most of her available testosterone, feel exhausted and unable to change her body composition, get labs back that say everything is normal, and be sent home with no answers.
That is not a discipline problem. That is an incomplete lab panel.
What Labs to Ask for at Your Next Appointment
Most standard hormone panels only order total testosterone. That is not enough. At your next appointment ask specifically for:
- Total testosterone
- Free testosterone
- SHBG (sex hormone binding globulin)
- Full hormone panel including estrogen and progesterone
- Thyroid panel
Timing also matters. Have your blood drawn in the morning when testosterone is naturally at its daily peak. If you are already on testosterone therapy, ask your clinician about ideal draw timing relative to your last dose. A draw right after a pellet insertion will show artificially elevated levels. A draw at the tail end of a long cycle will show artificially low ones.
What to Do If Your Doctor Says Everything Looks Normal
If your labs come back normal but you are still struggling to lose weight, build muscle, sustain energy, or feel like yourself, push back. Ask specifically about your free testosterone and your SHBG. If your provider is not familiar with those markers or dismisses the question, that tells you something important about whether this is the right fit for your care.
The goal is not to hit a number that looks good on a lab report. The goal is to find the hormone levels where you personally feel strong, energized, and capable of the body composition changes you are working toward. That number is different for every woman, and a good clinician will treat you as an individual rather than comparing you to a population average.
If you want to get these labs ordered and reviewed by a clinician who specializes in women's hormonal health, I always point people to chalene.com/test as a starting place. They're who I use, trust and love.
Full disclosure- I'm a paid partner with Midi Health.
Love you, mean it!
Chalene
P.S. I teach progressive overload, nutrition and hormone health inside my program Phase It. Check it out if you'd like more help and a guide (ok, a bossy big sister) to coach you through this stage of life.
Frequently Asked Questions
Why can't I lose weight after 40 even when I do everything right?
Hormone changes in perimenopause and menopause affect how your body stores fat, builds muscle, and uses energy. Low free testosterone is one of the most overlooked reasons women over 40 struggle with body composition despite doing all the right things.
What is the difference between total testosterone and free testosterone?
Total testosterone measures all the testosterone in your bloodstream including the portion bound to proteins and unavailable for your body to use. Free testosterone is the small unbound portion that is biologically active. Only free testosterone can actually affect your energy, muscle building, fat loss, and mood.
What is SHBG and why does it affect weight loss?
SHBG stands for sex hormone binding globulin. It is a protein produced by your liver that binds to testosterone and makes it unavailable for your body to use. High SHBG means less free testosterone is accessible, which can make it very difficult to build muscle and lose body fat even when total testosterone looks normal.
Why do my testosterone labs look normal but I still have symptoms?
Because most standard panels only measure total testosterone. If your SHBG is high, much of that testosterone is bound and your tissues cannot use it. Free testosterone can be low while total looks fine, which is exactly why symptoms persist even when a doctor tells you everything looks normal.
What should I ask my doctor to test for?
Ask for total testosterone, free testosterone, and SHBG together. Add a full hormone panel and thyroid panel. Most standard orders skip free testosterone and SHBG entirely, so you need to ask specifically.
Is a testosterone cream better than pellets for weight loss and energy?
Pellets cannot be adjusted once inserted. If the dose is off in either direction you are stuck with it until they dissolve. A daily transdermal cream more closely mimics how your body naturally produces testosterone, with consistent daily levels rather than a spike followed by a long gradual crash. For body composition goals specifically, consistent stable testosterone levels tend to support more reliable energy and muscle building.
When should I get my testosterone labs drawn?
Morning is best since testosterone is naturally highest earlier in the day. If you are on testosterone therapy talk to your clinician about the right timing relative to your last dose to get the most accurate reading.
