If your energy, drive, focus or strength has quietly faded, low testosterone may be the cause, and it is measurable. At Longevity Marbella, testosterone replacement therapy is diagnosed with proper blood work, built around you, and monitored by a double board-certified specialist. No guesswork, no one-size-fits-all protocols.

Dr de Windt, MD
Dr de Windt, MD Double board certified in Spain • Internal Medicine and Endocrinology • Full authority to diagnose and prescribe • Número de colegiado 292911860 Your care is directed and monitored by me personally. Trained in andrology, fertility and sexual medicine with ASESA, the Spanish andrology association, across the 2025 and 2026 editions of its national course.

Gain muscle. Regain energy. It starts with a measurement, not a promise.

Signs you may have low testosterone

Low testosterone becomes more common with age and easily dismissed as "just getting older." If several of these feel familiar, a proper assessment with repeat morning bloodwork can give you a clear answer:

Measured first. Treated second.

Done correctly, TRT is a precise medical process, not a quick prescription. Our approach has four parts:

The change, in numbers. Muscle gained and fat lost, documented visit by visit. The Body Composition Assessment

Why specialist-led care matters

Your care here is directed by a doctor double board-certified in Internal Medicine and Endocrinology, deep expertise in hormones and in how the rest of your body responds to them. That means you are treated, not just monitored, and the things that matter (your heart, blood and organ markers) are watched by someone trained to read them. More on this here: GP vs endocrinologist for TRT, why who treats you matters.

Is testosterone therapy safe?

For men with a genuine diagnosis who are treated to normal levels and properly monitored, the evidence is reassuring. The largest trial to date found no increase in major cardiac events or prostate cancer, while recording higher rates of atrial fibrillation, kidney injury and lung clots, which is exactly why monitoring matters. Properly managed and monitored, TRT has a well-studied safety profile, but it is not exempt from possible complications, which is exactly why specialist monitoring matters. We've explained the full evidence in plain English here: Is testosterone therapy safe? What the largest study ever found.

TRT and your fertility

Standard testosterone therapy can reduce fertility while you are on it. If you may want children, that needs to be planned for from the start, and there are protocols to help preserve fertility. Read more: How to improve male fertility.

Starting a family? Then fertility comes first, planned before anything else.

Discreet, convenient, on your terms

Care that fits a demanding life: private telemedicine consultations and discreet concierge home visits across Marbella, Estepona, Puerto Banús and the Costa del Sol. English and Dutch spoken, in complete confidence.

Explore our specialist services

Request your consultation

About Testosterone Replacement Therapy. Tell me briefly what you need and how to reach you. Your enquiry comes straight to me, in confidence, and I reply personally.

Handled in confidence and never shared. Consultations in English or Dutch, by secure video or across the Costa del Sol.

Frequently Asked Questions

Is TRT legal in Spain?

Yes. Testosterone replacement therapy is a legal, regulated prescription treatment in Spain when it is prescribed and monitored by a licensed doctor for a diagnosed medical need such as low testosterone (hypogonadism).

What does TRT cost at Longevity Marbella?

Cost depends on your individual protocol, which is built around your blood work and goals. We discuss everything transparently after your consultation and assessment, with no obligation.

Do you offer telemedicine and home visits?

Yes. Consultations are available by private video call, and we offer discreet concierge home visits across Marbella, Estepona, Puerto Banús and the wider Costa del Sol.

How soon will I notice results from TRT?

It varies between individuals. Many men notice improvements in energy, mood and libido within the first weeks, while changes in body composition and strength build over several months. Your response is tracked with follow-up blood work.

Is testosterone therapy safe?

For men with a confirmed diagnosis who are treated to normal levels and properly monitored, the largest trial to date found no increase in major cardiac events or prostate cancer, with monitoring still essential. Safety depends on correct diagnosis, appropriate dosing and ongoing specialist monitoring.

Who is a candidate for TRT?

Men with symptoms of low testosterone, persistent fatigue, low libido, low mood, loss of strength or focus, confirmed by blood tests. Candidacy is always determined by a doctor after assessment.

This page is for general information only and is not medical advice. Testosterone therapy is a prescription treatment, whether it is right for you, and how it is monitored, is always determined by a qualified doctor after individual assessment.

Considering testosterone therapy?

Speak with our specialist about properly diagnosed, monitored hormone optimization, on a private video call or a concierge home visit across the Costa del Sol.

Book a Consultation