Weight loss is not as straightforward as calories in versus calories out for everyone. For many people, underlying metabolic factors make it harder to lose weight, and medical weight loss can help move things along.
Even within medical weight loss, though, what works well for one person doesn’t necessarily work for another. This is because metabolism varies significantly from person to person. Hormone levels, insulin sensitivity, thyroid function, gut health, sleep quality, and stress response all influence how the body manages weight.
Rather than handing you a standard diet plan or prescribing medication without context, our team of internists at Integrative Primary Care conducts thorough evaluations, identifies the factors specific to your metabolism that are affecting your weight, and creates a plan around what your body needs.
Here, we cover how metabolism affects weight, what a tailored medical weight-loss plan involves, and why working with an internist yields better outcomes.
Metabolism is the process by which the body converts food into energy. It’s influenced by factors such as age, sex, body composition, hormone levels, genetics, and lifestyle. Two people can eat the same diet and do the same amount of exercise and lose weight at completely different rates because they have different metabolic baselines.
Basal metabolic rate (the number of calories the body burns at rest just to keep basic functions running) varies considerably between people. Someone with a higher muscle mass burns more calories at rest than someone with a higher proportion of body fat, even at the same body weight.
Hormones like thyroid hormone regulate how fast or slow your baseline runs, which is why an underactive thyroid can make weight loss slow, even in someone doing everything right. Insulin, cortisol, leptin, and estrogen all influence fat storage, appetite, and energy use in ways that vary from person to person and can be assessed and addressed with the right testing.
Bloodwork is central to this process. Thyroid function, fasting insulin, blood sugar, cortisol levels, sex hormones, inflammatory markers, and nutritional deficiencies are all assessed to understand where the obstacles to weight loss are.
For some people, the results reveal an underactive thyroid that has been slowing metabolism for years without a diagnosis. For others, insulin resistance is making it difficult for the body to use glucose efficiently, which promotes fat storage even on a modest diet.
Once the evaluation is complete, the treatment plan is tailored to what the results show. For a person with insulin resistance, the dietary plan focuses on reducing the foods that spike blood sugar and insulin. For a person with low thyroid function, treating the thyroid condition is often the first step. For a person with elevated cortisol from chronic stress, stress management and sleep become central elements of the plan.
Rather than a standard low-calorie diet, our nutrition recommendations are created around your metabolic needs. Exercise recommendations follow the same logic, with the type, intensity, and frequency of activity matched to what will be most effective for your metabolism rather than a blanket prescription.
For some people, lifestyle changes alone aren’t sufficient to overcome the metabolic obstacles identified in the evaluation. Medication can play an important supporting role in those cases. GLP-1 receptor agonists (a class of medications that includes well-known options like semaglutide) work by regulating appetite and improving insulin sensitivity, producing significant weight loss in people who haven’t responded adequately to lifestyle changes alone.
The decision to use medication is made based on your evaluation results, weight loss history, and overall health. However, it’s important to know that medication is a part of the broader plan, not a replacement for addressing the underlying metabolic factors.
Metabolism isn’t static. It changes as weight is lost, as the body adapts, and as other health factors shift over time. A medical weight loss plan needs to be monitored and adjusted regularly to stay effective. Regular follow-up appointments allow us to track your progress, repeat relevant testing where needed, and make changes to the plan based on how your body is responding.
If you’ve been struggling to lose weight despite putting in the work, the issue is likely metabolic, and that’s something that can be identified and addressed with the right evaluation and the right plan. Schedule a visit with us today and find out what’s been holding your weight loss back.
