Same Medication, Different Results
If you're on a GLP-1 medication, or you've thought about it, you've heard the pitch: take the medication, and the weight comes off. For a lot of people, it does.
But here's a question almost nobody asks. If two people take the exact same medication, why does one of them lose a lot more than the other?
A huge new study has an answer, and it isn't the dose.
The study you need to know about
Researchers in the UK followed more than 126,000 adults who started the same GLP-1 medication through an online weight-loss program. Everyone had the same support available: live group coaching, help from dietitians and nutritionists, weekly weigh-ins and an app.
Most people mainly took the medication. A smaller group used the support. They came to coaching, logged their weight every week and stayed active in the program.
After a year, the engaged group had lost about 23% of their body weight, compared with about 17.5% for everyone else. The gap showed up within two months and kept growing. The engaged group was also nearly 3 times as likely to lose 20% or more. An earlier study from the same team, with almost 58,000 people, found the same pattern.
To be fair, this wasn't a randomized experiment, and people who show up for coaching may be more motivated to begin with. But when the same result shows up in two groups this big, it's worth paying attention to.
Why support matters when the medication is doing the work
The medication controls how much you want to eat. It doesn't control what you eat.
In a separate study of people on these medications, the average person got about half the fiber they need, too little vitamin D, and not enough protein for their body size. Eating less is easy when you're not hungry. Eating well while eating less takes a plan.
That's why four major medical organizations put out joint guidance on these medications. Their list of what the medication doesn't fix: side effects like nausea, nutrient gaps, losing muscle and bone along with fat, and people stopping and regaining the weight. Their answer is nutrition, strength training and ongoing support alongside the prescription.
The muscle and bone part is real. In one randomized study, people on a GLP-1 medication alone lost more bone density at the hip and spine than people who exercised, even though both groups lost similar weight. Lose weight without a plan, and some of what comes off is the stuff you want to keep.
What this means for you
Protein first. When your appetite is low, put protein on the plate before anything else. Across 28 studies of people losing weight, eating more than 1.3 grams per kilogram of body weight a day (about 0.6 grams per pound) went with keeping muscle, and less than 1.0 g/kg with losing it. Unless your doctor has told you otherwise, that's our target.
Don't skip the fiber. Vegetables, fruit, beans and whole grains. Digestion can get sluggish on these medications, and fiber helps.
Lift three times a week. Eight to ten exercises that cover your major muscle groups, 30 to 60 minutes. Across 25 studies of people losing weight, adding strength training protected muscle and made more of the loss come from fat. Protein gives your body the materials. Lifting tells it to use them on muscle.
If nausea shows up, go smaller and slower. Smaller meals, eaten slowly, stopping when you're comfortable instead of full. If it doesn't settle, talk to your doctor.
Check in every week. Weigh in, and tell me how you're eating and how you feel. That's the habit the engaged group had.
None of this is medical advice. Anything about your prescription, your dose or your side effects is a conversation with your doctor.
The bottom line
The medication can turn down the hunger. What you build with that breathing room is up to you, and you don't have to figure it out alone.
If you're on a GLP-1 or thinking about one, contact me. Tell me where you're starting, and we'll build the plan around it.
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