Lose Fat, Keep Muscle: Medical Weight Loss in Marbella

Modern weight-loss medicines work, but they work best, and most safely, when a doctor runs the program. At Longevity Marbella, your treatment is built on assessment and blood work, matched to your metabolism, and monitored from start to maintenance.

Why doctor-led matters

Buying these medicines online with no oversight is where people run into trouble: wrong dose, avoidable side effects, lost muscle, and weight regained the moment they stop. A medical program protects your results and your health.

Hidden cardiovascular risk sits in the fat you cannot see.

What the program includes

• Medical assessment, your history, goals and suitability.
• Blood work, to treat safely and track metabolic health.
• A personalized GLP-1 protocol, semaglutide, tirzepatide or alternatives where appropriate, titrated to you.
• Body composition and visceral fat, tracked through your program, so you know exactly what you are losing. Nutrition guidance helps you protect muscle and keep it off.
• Ongoing monitoring, dose adjustment and support throughout.

The assessment, in full

Weight is an outcome, and the assessment looks for what is driving it before anything is prescribed:

• A careful history and your goals, because a program you can live with beats a perfect one you abandon.
• Blood work that looks for contributors: thyroid function, glucose and metabolic markers, lipids, and the hormonal picture, so a treatable cause is treated rather than papered over.
• A medication review, since some everyday prescriptions quietly push weight upward.
• Baseline body composition: muscle mass and quality, visceral fat measured directly on ultrasound, and grip strength, because the goal is to lose fat, not weight, and you can only protect what you measure.
• A DXA scan on request, as the reference standard baseline to repeat later.

Which medication is right, Ozempic, Wegovy or Mounjaro?

These names come up constantly, and the differences matter. We've broken it down plainly here: Mounjaro vs Wegovy: what's the difference? The right choice for you is a medical decision made after assessment. And for where the field is heading, see retatrutide vs Mounjaro vs Wegovy: the next generation.

The medicines, and how one is chosen

The modern options are genuinely effective, and the numbers come from their landmark trials, which we have written about in detail in Mounjaro and Wegovy, how safe and how effective are they:

• Tirzepatide (Mounjaro): in SURMOUNT-1, about 2,500 adults followed for 72 weeks, average weight loss ran from about 15 percent at the lowest dose to about 21 percent at the top dose, roughly a fifth of body weight.
• Semaglutide (Wegovy): in STEP 1, about 2,000 adults followed for 68 weeks, average loss about 15 percent. In the SELECT trial it also cut major heart events by about 20 percent in people with overweight and established cardiovascular disease, which matters when the goal is health rather than a number.
• The choice between them follows your metabolic picture, your cardiovascular history, side-effect tolerance and practicalities; the dose is raised slowly so the stomach-related effects stay manageable, and the protocol adapts to you as you respond.

Muscle is protected on purpose: protein set to your own body, resistance training built into the plan, and the muscle itself measured before, during and after, because the evidence is clear that standard diet advice alone does not prevent lean mass loss, and equally clear that pairing treatment with monitoring and muscle-protective training works. And for the newer agent everyone asks about, retatrutide, the honest answer stays the honest answer: promising, and not yet approved anywhere, so it is discussed properly when it legally exists.

Specialist oversight

Care is directed by a doctor double board-certified in Internal Medicine and Endocrinology, the metabolic and clinical depth to do this properly, not just write a prescription.

And the second measurement is part of the plan, not an extra. Weight loss without a reassessment is guesswork about what was actually lost. The InBody and ultrasound comparison at three months tells us whether the loss was fat or muscle, and the protocol adjusts to that number, not to the scale.

How treatment is reviewed

Reviews follow the titration at first, so dose and side effects are adjusted while your body answers, and then settle into a rhythm shaped by your case. Body composition is repeated along the way, so what is coming off is verifiably fat and the muscle line holds. And the end is planned from the beginning: the habits, the training and the protein that keep the result are built during treatment, not improvised after it, because weight lost without that structure tends to return the moment the medicine stops. This is individualized medicine, and the schedule follows you.

The questions worth asking any weight loss clinic

When we defer

• When a treatable cause explains the weight, thyroid disease or a medication effect first among them, because treating that is sometimes the whole answer.
• With a personal or family history of medullary thyroid carcinoma or MEN2, where this class of medicine is not recommended and a different plan is built instead.
• With a history of pancreatitis or active gallbladder disease, until it is properly assessed.
• When the case belongs in a hospital obesity unit, with severe or complex obesity, or where an intragastric balloon or bariatric surgery should be on the table: then I say so plainly, and my surgical coordination service walks you into the right hands and stays alongside you, rather than holding you in a medication program that is no longer the best tool.
• When muscle, not fat, is the urgent problem, in older or low-muscle patients, where rebuilding comes first or runs alongside from the start.

Deferred is not refused: most of these are a sequence, not a wall, and the assessment tells us which.

Discreet and convenient

Private telemedicine and discreet concierge home visits across Marbella, Estepona, Puerto Banús and the Costa del Sol. English and Dutch spoken.

Explore our specialist services

• Testosterone Replacement Therapy (TRT)
• HRT & Menopause Care
• Men's Health
• Longevity & Preventive Medicine
• Private Prescriptions & Continuity of Care
• Surgical Coordination & Second Opinions

★★★★★ 5.0 on Google from 21 reviews

“Best Endocrinologist for weight loss and improved body composition.”

Lianne Nicole Muller, Google review

“I started working with this endocrinologist to help with weight loss, and the results have gone far beyond the scale. The weight I’ve lost has significantly improved my kidney function, which has been a huge relief. What stood out most was how available he was always ready to answer questions and explain the plan clearly. That level of support gave me real confidence and a lot of peace of mind throughout the process.”

Christopher Abraham, Google review

Unedited Google reviews from the verified profile I manage. A selection is shown here; all twenty-one are on Google, including the ones in other languages.