Why we founded Definitiv
There's nothing more important than your health. We think it's something to take seriously
We founded Definitiv because we saw a gap and a better way to do things. The IV therapy market had plenty of providers happy to hand you a drip and send you on your way. But without knowing what your body truly needs, that's just an expensive guess. We believed customers deserved more than that.
Definitiv was built on a simple idea: IV therapy should be led by science rather than guesswork. By combining laboratory diagnostics with IV therapy, we give your body the exact nutrients and vitamins it needs informed by your own blood data, not a general assumption.
The Problem With "Choosing" a Drip
Walk into most IV clinics and you'll be handed a menu. Pick something, hope for the best. Maybe it helps. Maybe it doesn't. A drip that isn't built around your body is just an expensive guess.
We do it differently. Your blood test shows us exactly where your deficiencies are - so we're not guessing, we know. What we recommend comes from your results, checked by our clinical team and our exclusive lab partner. Not from what's trending.
You're not going in blind. That's the difference.
How
IV Therapy
works
IV therapy delivers nutrients directly into your bloodstream via a small intravenous drip. Unlike oral supplements, which must pass through your digestive system and lose a significant portion of their potency along the way, IV therapy achieves near-complete absorption. The effects are faster, more reliable, and more measurable.
A typical session takes between 30 and 90 minutes, depending on the treatment. Our nurses administer every drip using sterile, pharmaceutical-grade ingredients in a clinical and comfortable setting, whether that’s your living room or our clinic.
Clinical Standards With Real Results.
A qualified nurse administers every Definitiv treatment, using sterile, pharmaceutical-grade ingredients and proper clinical protocol.
Every blood test goes through our exclusive lab partner, so your results are accurate and stand up to scrutiny.
Brent clinic or a home visit anywhere in London - the standard doesn't change. Same nurses, same ingredients. Just a different postcode.
Wellness That Comes to You.
Life doesn't pause for appointments. That's why we built the call-out service from day one.
A qualified nurse comes to your home or office with everything needed to run the appointment safely. Blood results are back within 24 hours, IVs go in on the spot. Your day carries on, and the care doesn't drop a notch.
We cover home and office visits across London, roughly an hour from North West London.
The Proactive Health Approach.
The most valuable thing you can do for your long-term health is to understand it.
Our blood panels show you what's happening under the surface - energy, immunity, hormones, metabolism, heart health. Once you have that, you can accurately treat what needs treating, instead of following a generic wellness plan.
Done properly, IV therapy isn't indulgence. It's an investment in a healthier you.
What Makes Definitiv Different
Diagnostics-led treatment
Blood tests identify exactly what your body needs before any IV course is recommended
Exclusive laboratory partner
All blood tests analysed for clinically accurate, same-day results
You're not going in blind
Expert diagnostics remove the guesswork from IV therapy entirely.
A true one-stop shop
Blood tests, diagnostics, IV therapy, and follow-up monitoring in one continuous programme
We come to you
Call-out service covering all of London, with clinic appointments at our Brent location
Qualified nurses, every time
Pharmaceutical-grade ingredients, strict clinical protocols, every appointment
Proactive, not reactive
Built for people who invest in their health before problems arise