Jan Okoye-Weeg · Functional Medicine · Berlin-Mitte
“Everything's normal” is not an answer.
Fatigue, digestion, frequent infections, brain fog: functional medicine looks for the cause behind your symptoms — with diagnostics that go deeper.
Book your first visit →Does this sound familiar?
You know something's off. Your test results just don't agree.
- Exhaustion that even good sleep doesn't fix
- Digestive issues, bloating, intolerances
- Brain fog and trouble concentrating
- Frequent infections or always “coming down with something”
- Thyroid or metabolic issues without a clear diagnosis
- Doctors say “everything's fine” — your body says otherwise
Standard blood panels check whether you're ill. We look more closely at why you don't feel well.
Find causes, don't manage them.
Advanced diagnostics
Micronutrients, hormones, inflammation markers, gut health — well beyond the standard blood panel.
The whole system
Nutrition, stress, sleep, movement, and biochemistry are looked at together — not as separate construction sites.
Orthomolecular therapy
Targeted micronutrient optimisation instead of a scattergun — dosed by your lab values, not by trend.
Your doctor
Jan Okoye-Weeg
Physician · Sports Scientist · Biologist
Jan is a physician, sports scientist, and biologist — specialised in the question of why symptoms happen. His toolkit: functional diagnostics, orthomolecular medicine, and a view that sees the whole system.
Your first visit
Three steps. No stress.
01
You upload in advance.
Findings, labs, your history. We arrive prepared.
02
We take our time. 60 minutes.
No repeating your story, no box-ticking. We start with what matters.
03
Your plan against the cause.
Diagnostics, therapy, follow-up — you see your values move, in black and white.
From our patients
What patients say.
5.0
★★★★★
Practice rating on Google
"The best doctor. He truly takes his time. His holistic approach uncovered an illness my family doctor simply couldn't find."
Peter Lecour
★★★★★ Google Review
"Jan Okoye-Weeg is one of the few doctors who really makes you feel seen as a whole person – not just as a patient with a symptom."
Jan Hoffmann
Co-Founder, marta
Frequently asked
Questions before your first visit.
Ready to understand what's really going on?
PKV and Beihilfe reimburse many of our services; self-pay welcome. No hidden costs — we discuss everything transparently up front.
Book via Doctolib →Or message us on WhatsApp