Everyone’s talking about GLP-1 medications. If you’ve been on the moon the last year then you might not be aware of them….. But if you’ve been on earth then there’s probably at least 1 or 10 people in your inner circle who are on them… or look like they are on them.
And the question I keep getting from women I work with — and women considering working with me — is some version of this:
“Should I just get on a GLP-1? I feel like it’s cheating…. I also am concerned with side effects I am hearing about…
Fair questions. And now, thanks to a head-to-head study, we have a more honest answer than most people are giving you. In fairness it was a small sample size, but the point is there to be made
WHAT THE STUDY ACTUALLY DID
Researchers took 30 people with type 2 diabetes and split them into three groups for 12 weeks:
Group 1: Semaglutide (a GLP-1 medication) only
Group 2: An 800 calorie per day diet only
Group 3: Both combined
They measured weight loss, fat mass, insulin resistance, blood sugar, and pancreatic function — before and after.
The results surprised a lot of people.
WHAT THEY FOUND
The 800 calorie diet outperformed the GLP-1 medication on weight loss, fat loss, and insulin resistance.
The diet group lost 5.4 percentage points more body weight than the medication-only group. Fasting insulin and insulin resistance improved in the diet groups — but not in the semaglutide-only group.
The combination of both produced the most total weight loss overall. But here’s what’s important: the combination didn’t improve body composition or metabolic markers beyond what the diet alone achieved. The drug added weight loss on top of the diet. It didn’t add metabolic benefit on top of it.
What does that tell us?
The diet was doing the heavy lifting.
WHY THIS MATTERS MORE THAN YOU THINK
GLP-1 medications work primarily by suppressing appetite. They quiet what a lot of researchers call “food noise” — that constant mental chatter about food, cravings, and what you’re going to eat next.
That’s genuinely useful. I’m not going to pretend it isn’t.
But appetite suppression without a nutritional foundation is just eating less of the wrong things, less often. The drug can reduce how much you want to eat. It can’t teach you what to eat, when to eat it, or how to build habits that outlast the prescription. Let alone get you to lift weights 3x a week.
And this study backs that up. When structured nutrition was in the picture, outcomes improved — with or without the medication.
THE SUSTAINABILITY QUESTION
The most common pushback I hear is: “But the diet is brutal. 800 calories a day isn’t realistic long-term.”
That’s true. An 800 calorie liquid meal replacement protocol is unsustainable for most people, and I’d never recommend it as a long-term strategy.
But the principle the study validates isn’t about 800 calories. It’s about structured, intentional nutrition. When you have a plan — one that fits your actual life, accounts for your schedule, your stress, and your preferences — you don’t need to white-knuckle your way through it.
The study used a very aggressive protocol to test the outer limits of diet-driven results. What it showed is that the body responds powerfully to real nutritional change. You don’t need a drug to create that response. You need a framework.
WHAT ABOUT PEOPLE ALREADY ON GLP-1S?
This is where it gets interesting for me professionally.
If you’re currently on a GLP-1 medication, this study isn’t an argument to stop. It’s an argument to build the nutrition foundation that makes your medication more effective — and that protects you when you eventually come off it.
The research is fairly consistent: when people stop GLP-1 medications without behavioral and nutritional habits in place, weight returns. The drug quieted the noise. But if you never learned to navigate the quiet, you’re back where you started once the prescription ends.
Whether you’re on a GLP-1 or not, the diet is doing the work that lasts.
THE BOTTOM LINE
Three groups. Twelve weeks. One clear finding:
Structured nutrition outperformed a $1,000-a-month injection on the metrics that matter most. On average my clients work with me for 5-7 months and then it sticks. We create momentum, then mastery and then maintenance.
The combination won on total weight loss. But the diet alone won on the metabolic outcomes that determine long-term health.
GLP-1 medications are a tool. A legitimate one for the right person. But tools don’t build anything on their own. You still need a system, systems win consistently
I am the founder of Reveal Coaching, an online nutrition and personal training practice specializing in sustainable fat loss for women 35+. I have 27 years of experience in the industry and work with clients through daily accountability, personalized nutrition planning, and a coaching model built around real life — not ideal conditions. Learn more at reveal-weightloss.com.
Study reference: Metabolic effects of very-low calorie diet, Semaglutide, or combination of the two, in individuals with type 2 diabetes mellitus. Clinical Nutrition, July 2024.
