How GLP-1s work in a holistic approach to health
Weight management means something different to everyone. Different goals. Different bodies. Different reasons.
The conversation around it, especially weight loss, has shifted a lot in the last few years, and a new class of medications is a big reason why.
GLP-1 receptor agonists have become one of the most-prescribed weight management tools in the country. Use has continued to climb steadily over the last couple of years and is showing no signs of coming down anytime soon.
The data behind them is real. Genuine progress is being made.
Whether you choose to use a GLP-1 or not is completely personal and nobody’s business but your own.
The research has been clear about the benefits and the shortcomings of GLP-1 use. The same literature also holds the answers as to how to support those shortcomings for far better outcomes. Understanding both will ensure that the results realized are the results desired.
What We’ll Cover
Other Tools That Can Support GLP-1 Use ?
GLP-1s Are Just a Tool in a Toolbox.
How Do GLP-1s Work?
Your body already makes GLP-1 naturally in your intestine. This hormone interacts with receptors in your body to slow gastric emptying, dial down appetite, stimulate insulin secretion, and trigger fullness earlier in a meal.
GLP-1s, or GLP-1 receptor agonists, mimic the hormone you are already making and interact with cellular receptors to elicit these same physiological reactions.
Basically, GLP-1s help you eat less, often without thinking about it.
The appetite effect isn’t new science. As far back as the late 1990s, a small study in Gut demonstrated dose-dependent reductions in food and fluid intake when GLP-1 was infused into healthy adults. People reported less hunger before meals and earlier fullness during them.
That study looked at what happens with one dose. The newer research takes that signal and examines it across a much longer period of time. The results shouldn’t be surprising.
A 2025 meta-analysis of 22 randomized trials confirmed what users have already been reporting: significant reductions in total body weight.
The NOBULL Bottom Line:
GLP-1s work by changing how much you want to eat, ultimately affecting how much you eat. Everything else is up to you.
What’s the Catch?
Eating less is the mechanism. It’s also the problem. Without intentional support, prolonged use has been associated with some significant drawbacks.
Muscle loss. The same 2025 meta-analysis showing significant reductions in body weight found that roughly 25% of the weight lost when using GLP-1 receptor agonists came from lean mass, not fat.
Nutrient gaps. A 2025 study in Frontiers in Nutrition examined what GLP-1 users were actually eating and found significant deficiencies across multiple macro- and micronutrients.
Food aversion. A 2025 case study in Obesity Reviews flagged the importance of monitoring food aversion in some users. When food aversions start to rise, an overall unhealthy relationship with food can form, potentially furthering some of the negative effects of GLP-1s.
The NOBULL Bottom Line:
GLP-1s require intention. Without it, use can result in less fuel and other supporting nutrients, which are crucial for promoting performance.
Other Tools That Can Support GLP-1 Use ?
Holistic GLP-1 use requires a broader view than just medication. A handful of behaviors consistently show up in the research as effective ways to realize the full potential of GLP-1 use.
Protein intake. As explored in Protein and Nutritional Health, protein supplies the amino acids that build and maintain muscle mass. During a meaningful caloric deficit, where most GLP-1 users find themselves, the body starts to shed lean and fat mass together. Upping protein consumption has been shown to help protect the body from losing precious lean mass while dieting (1). A whey or plant protein supplement helps cover the gap when whole-food intake is a struggle.
Fiber. Total food intake drops on a GLP-1, and fiber tends to drop with it. Fiber feeds the gut bacteria that drive microbial diversity, intestinal barrier function, and short-chain fatty acid production (2). Overall, fiber supports gut health, and as more and more research continues to support the holistic importance of gut health, ensuring nutritional support becomes more and more important.
Multivitamins. Eating significantly less makes it harder to meet your vitamin and mineral needs. A targeted multivitamin doesn’t replace food. It just makes it less likely that a thin week of eating leaves a real gap.
Hydration. GLP-1s suppress fluid intake along with food intake (3). Lower total water means less support for performance, recovery, and basic body function. Electrolytes can help with hydration levels and water retention, especially when daily fluid volume is dropping.
Resistance training. Resistance training is one of the single most-supported ways for protecting lean mass during weight loss, especially when paired with adequate protein intake (4). Research has shown that at least two resistance training days of exercise taken close to failure (when you can’t move the weight anymore) support lean mass during caloric restriction.
The NOBULL Bottom Line:
Supporting GLP-1 use requires intention. The combination of monitoring nutrient and water consumption, targeted training sessions, and big-picture goal-setting techniques can help curb the potential downsides of GLP-1 use.
GLP-1s Are a Tool in a Toolbox.
GLP-1s are, without a doubt, powerful. But they are far from magical.
Though they may shine in the weight-loss category, they fall short in terms of complete holistic support.
The potential nutrient loss is very real, and so are the physiological downstream effects that can limit performance.
Ensuring adequate amounts of protein and other supporting nutrients and lifting heavy are some of the best ways to preserve performance and get the most out of weight management efforts.
The medication helps to curb appetite and food intake. But that is only one side of healthy weight loss. Other strategies are needed for a more complete weight loss system.
About the sources
Dr. Vince Kreipke, PhD
PhD, Exercise Physiology — Focus in Sports Nutrition
This article was written by Dr. Vince Kreipke and is not AI-generated. The sources used in this piece are pulled from peer-reviewed research, clinical guidelines, and relevant bodies of authority, then reviewed for quality, context, and alignment with the broader scientific consensus.
