Press and hold
1. Your full assessment
Not just another check-up. We measure body composition, blood tests, strength and habits to understand why losing weight is hard for you.
Two cities,
one method

A medical weight loss programme that protects your muscle, measures what really matters and leaves you ready to keep it off.
Our method
LVNG combines a full medical assessment, a personal plan and close follow-up so that you lose fat, not health.
Learn more
Press and hold
Not just another check-up. We measure body composition, blood tests, strength and habits to understand why losing weight is hard for you.
Press and hold
We turn every result into a clear map of your health and go through it face to face with your doctor: what is excessive, what is missing and what needs protecting.
Press and hold
Nutrition, strength, sleep and medical treatment if indicated. Reviews to measure progress and a plan to keep it off.
Our principles
“Losing weight is easy to measure.
Losing the right weight isn't.”
“Muscle is the organ of longevity:
protect it from day one.”
“No weight loss works
without a plan to keep it off.”
“Every recommendation, with its evidence.
No fads.”
0 in 10
adults aged 25 to 64 in Spain are overweight or have obesity.1
0 %
or more of the weight lost with the new medicines was lean mass in some trials. That is why we measure and protect muscle.2
0 in 3
of the kilos lost were regained within a year of stopping treatment without a plan to keep them off.3
What we measure
Excess weight isn't a number on the scale. It affects systems that deteriorate silently for years, and we keep an eye on all of them.
Learn moreLosing weight without protecting muscle speeds up ageing. We measure lean mass, strength and function from day one.
Insulin resistance comes years before diabetes. We look for it with glucose, insulin and HbA1c so we can act earlier.
Visceral fat raises blood pressure, lipids and cardiovascular risk. We measure apoB, Lp(a) and your risk with validated scores.
Fatty liver is common and silent. We assess it with blood tests, fibrosis scores and abdominal ultrasound.
Sleep apnoea, stress and your relationship with food can sabotage any plan. We screen for them and treat them.
Our tests
A single figure doesn't tell the whole story. That is why we bring together body composition, blood tests, ultrasound, strength, sleep and habits in one programme.

Our locations
Unhurried consultations with time to talk. A carefully considered experience from start to finish, far from the usual healthcare.
Programmes
Four levels that add professionals according to what you need. Three-month minimum commitment; after that you can change programme whenever you like.
Your doctor, at every step
Discover EsencialIncludes:
Your doctor and one professional of your choice
Discover IntegralEverything in Esencial, plus:
Your doctor and two professionals of your choice
Discover ActivoEverything in Esencial, plus:
The complete programme, with DXA
Discover SignatureEverything in Esencial, plus:
LVNG Lab
Calculators with validated formulas and their source, in Spanish. They don't replace a consultation, but they help you arrive with better questions.
LVNG Journal
Muscle6 min readLosing weight can cost you muscle. What to measure, eat and train so that what you lose is fat.
Nutrition5 min readBetween 1.6 and 2.2 g per kilo of your target weight a day while you lose weight. We explain why.
Maintenance7 min readObesity is a chronic disease. How to design an exit that doesn't take you back to square one.
Metabolism4 min readWhy your waist says more than your weight, and how to measure it properly.
Sleep5 min readSleep apnoea, hunger and weight: a two-way relationship.
Habits3 min readTen minutes that change your glucose curve.
LVNG is a medical programme. Before suggesting anything we measure your body composition, blood tests, strength and habits, and use them to design a plan for nutrition, exercise and, if indicated, medication.
The goal isn't only to lose weight but to lose fat while preserving muscle and reach a weight you can maintain. LVNG doesn't replace your family doctor: it complements them, and you can share your report with them.
Not always. In each case we assess whether it is indicated, what benefits and risks it has for you and how it combines with nutrition and strength. If it is used, it comes with close follow-up and a plan from the start for when it is withdrawn.
Because part of what you lose when slimming can be muscle, and muscle is key to your metabolism, your independence and your long-term health. Measuring it at the start and during the programme lets us adjust protein and training in time.
You move on to LVNG Continuum, a maintenance plan with reviews further apart, to consolidate what you have achieved and spot any weight regain in time.
LVNG is led by Dr Juan Fabiani de la Iglesia, a specialist in Family and Community Medicine (ranked first in his specialty training cohort) registered with the Seville College of Physicians under no. 414119259. He has over six years' experience in emergency medicine, has trained in longevity medicine, and his research, with 33 publications and conference papers, has focused on cardiovascular prevention, lipids and lipoprotein(a).
He sees patients in Seville and Barcelona, in Spanish, English and Italian. Every recommendation is based on clinical guidelines and published studies, which we cite in the Journal and the Lab.

The best years of your life may still be ahead of you.
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