48 Wimpole Street, London, W1G 8SF
162-166 High Street, Berkhamsted, Hertfordshire, HP4 3AP
  • Marylebone, London
    48 Wimpole Street Marylebone, London, W1G 8SF
  • Berkhamsted, Hertfordshire162-166 High Street, Hertfordshire, HP4 3AP
  • 020 3131 7845
L-Theanine Infusion at a Glance
  • Price • Single Treatment – £200
    • Course of 3 – £540
    • Course of 5 – £800
  • Time Taken A typical infusion lasts just 30-45 minutes
  • Recovery Time No downtime is required. You can return to your day immediately, feeling refreshed and ready to go.
  • Expected Benefits • A sense of calm without drowsiness
    • Reduced stress
    • Boosted sleep quality
  • Treatment Advice Frequency and duration are medical-professional led in consultation with our doctor and nurse practitioners.
  • Consultation process We’re a caring, medically-led clinic. Ensuring your safety, wrap around care, and maximising the effectiveness of treatment is our priority for you. Before your first treatment, we require new patients to undergo a medical consultation with one of our medical team. Its cost of £150 is included in your L-Theanine Infusion treatment package.
Book Your Appointment:

If you would like to talk to one of our professionally trained team, simply request a callback to discuss our treatments at a time that works for you.

L-Theanine Infusion

5 Key Features/Benefits

What is an L-Theanine Infusion Treatment?

In a world that never slows down, finding a calm, focused mind can often feel like the ultimate mission. An L-Theanine Infusion, a signature treatment at IVBOOST UK, is your direct path to that feeling. This wellness treatment delivers a concentrated dose of the amino acid L-Theanine – found naturally in green tea leaves – directly into your bloodstream. Delivering the treatment in this way means that we bypass the issue of malabsorption through the gut.

The treatment is designed to provide an immediate boost to your well-being. By using an IV, we ensure your body gets the full, intended dose of L-Theanine to fuel cognitive and stress-reducing benefits. This remarkable amino acid is celebrated for its unique ability to promote relaxed alertness, helping you quiet the noise, sharpen your focus, and feel more balanced.

Who may benefit from an L-Theanine Infusion?

Our medically led team will consult with you prior to treatment; our treatments are always governed by clinicians.

Our L-Theanine Infusion is ideal for anyone seeking a fast and effective way to manage the demands of modern life. You’ll find it’s the perfect treatment if you are:

  • A student or professional who needs to find focus and reduce stress.
  • Someone experiencing high levels of stress or anxiety.
  • A person with troubled sleep.
  • Someone looking for a calmed mind and soothed mood to improve feelings of well-being.

How does an L-Theanine Infusion work?

Our L-Theanine infusions are a fast track to feeling your best and designed to work directly with your body’s own chemistry.

First, the IV delivers a dose of L-Theanine straight into your bloodstream, bypassing your digestive system for an immediate, full-strength boost of calm. From there, this powerful amino acid gets to work in two key ways:

  1. It boosts your brain’s natural rhythm. L-Theanine quickly travels to your brain, where it promotes the generation of alpha brain waves. These waves are associated with a state of relaxed alertness, which gives your mind the clarity and focus you need without making you feel tired.
  2. It supports your body’s feel-good chemicals. L-Theanine increases the production of calming neurotransmitters like GABA, which helps to quiet your mind and ease feelings of stress and anxiety. It also positively influences levels of brain serotonin and dopamine, giving your mood a powerful boost and creating a greater sense of well-being.

By working directly with your body on these two levels, an L-Theanine infusion provides a rapid, effective way to help you feel more balanced and in control.

Personalised treatment plans

With IVBOOST UK, you can be assured that our protocols are always medical professional led and they will consult with you regarding your medical history prior to treatment.

The calming and focusing effects of an L-Theanine Infusion are often felt following the first session due to the rapid delivery via IV. However, to help achieve the most optimal and sustained benefits, our medical practitioners may advise a short course of treatments. Because every patient has unique needs and goals, the recommended number of sessions and the suggested duration between those sessions will be entirely personalised.

Frequently asked questions

What is L-Theanine and what does it do?

L-Theanine is a really interesting amino acid that you can find naturally in green and black tea leaves, as well as some mushrooms. It’s often praised for its unique ability to promote a state of calm focus without making you feel drowsy. Think of it as a way to find your inner zen!

People love L-Theanine for a variety of reasons.

  • Helps with Stress and Anxiety: One of the most well-known benefits is its ability to help you relax. It works by increasing levels of certain calming brain chemicals, like GABA, and may help you feel less overwhelmed by everyday stress. This makes L-Theanine for stress and anxiety a popular choice for those looking for a natural way to unwind.
  • Improves Focus: While it’s great for relaxation, it’s also excellent for helping you concentrate. It promotes a state of alert calmness, which means you can stay focused on a task without feeling jittery or distracted. This is why many people who deal with ADHD find it helpful.
  • Boosts Sleep Quality: By helping you feel more relaxed and less anxious, L-Theanine can make it easier to fall asleep. It doesn’t act as a sedative, but rather helps you calm your mind so you can drift off to sleep more easily.
  • Supports Cognitive Function: Some studies suggest that L-Theanine can help improve memory and attention, especially when paired with caffeine.

For most people, L-Theanine is very safe and well-tolerated, with side effects being rare and typically mild. However, at IVBOOST UK, your safety is our top priority. That’s why we always conduct a thorough consultation prior to treatment. This allows us to discuss any health conditions you may have or any medications you are taking, ensuring that the L-Theanine infusion is a safe and suitable option for you.

Your treatment options

All our treatments are led by our doctor and nurse practitioners, which places us in an excellent position to suggest how our L-Theanine IV Drip can be used alongside our other integrational therapies to optimise when and how treatments are delivered. This gives you an opportunity to maximise your personal wellspring of well-being.

More IV Boost Services

Our patients love how great they feel after an IV therapy session

They report instantaneously feeling refreshed, replenished and rejuvenated as they emerge from our IV Vitamin Therapy treatment.

Elinor I. profile picture
Elinor I.
12:16 16 May 25
I was so excited to have my anti age treatment this morning .
I had a similar treatment last year and remember just how great I felt..but , this time I was given the ultra boost and after 15 minutes , I could feel that really warm and extraordinary feeling of super health and positivity .
I have had such a special morning with a warm welcome from Jackie at reception, who had been here for years , and had the ability to make one feel so comfortable, and as I am a Registered Nurse fully , appreciate that kind of enthusiasm.
Jeff , who is the clinical nurse who does the treatment, was so charming and actually just pure delight.

Thank you to Dr B . Jackie and Jeff for all this kindness and loveliness to make this a lovely morning and boosting my health and wellbeing. Elinor Irvine
From Zimbabwe
Omar A. profile picture
Omar A.
11:19 13 May 25
Amazing and wonderful professional service with experience I highly recommend
Tes N. profile picture
Tes N.
11:07 13 May 25
I attended the clinic for Skin glow treatment. Jeff from day one was very welcoming and professional. He pays attention to your needs, listens and explains the process every step of the way. I got lots of support. Btw I always look forward to my treatment days. Great team, great service and I feel great inside and outside.
Mariana K. profile picture
Mariana K.
11:06 07 May 25
Jeff is amazing 👦, he cares about me with patient and kindness. I am giving him 5 🌟. Thanks all team of IVBOOST UK. 🤗
With love Mariana
Priya T. profile picture
Priya T.
14:29 06 May 25
The best and most comfortable service, with lots of health care providers and the Jeff is the best.. ❤️
Alena B. profile picture
Alena B.
11:07 28 Apr 25
Incredibly professional, friendly and kind place ❤️❤️ I am usually terrified by needles and my veins are impossible to find but Jeff the head nurse was my angel ❤️❤️ i didn't feel anything and he was so kind and attentive making the whole experience so pleasant.
The doctor was also very caring, understanding and entertaining 😁
Photo from customer reviewPhoto from customer review
Zainab S. profile picture
Zainab S.
13:07 26 Apr 25
The most AMAZING place that I have been to I 100% recommend . I did a Iv drip . My face is glowing and I fell AMAZING . The doctors are AMAZING and friendly. Very Understanding. Good price . Skin glow booster AMAZING
rosy T. profile picture
rosy T.
14:15 25 Apr 25
Can't recommend enough ! I came here feeling wiped out after norovirus . Jeff the nurse immediately made me feel better with his warm energy and reassured me with his expertise and looked after me beautifully . It was incredible how I felt so restored after the treatment , a completely different person . And it was lovely to meet Jeff! I will definitely be coming back here
Olawande O. profile picture
Olawande O.
16:28 24 Apr 25
Absolutely fantastic, Jeff is a gem, always going above and beyond to look after me every time. Great service, these people actually care.
Lucas R. profile picture
Lucas R.
13:02 23 Apr 25
Jeff has made this whole experience wonderful. As someone who is scared of needles Jeff always made me feel safe and in good hands. He is always on good form and is the best in business.
4.9
Based on 84 reviews
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What happens on the day of your appointment at our London clinic?

Consultation from a highly experienced doctor

On the day of your appointment, you will be seen by one of our highly trained IV specialist doctors or IV Boost founder, Dr Joshua Berkowitz himself. We will have a medical consultation with you to learn your personal needs and confirm the most suitable IV treatment options for you.

Relax & enjoy your IV therapy treatment

Our clinic is an oasis of calm in the centre of London. Once your treatment has been chosen, you can sit back, relax and enjoy as we transform your health with IV Vitamin Therapy experience, which will take from 30 minutes – 1 hour, depending on your treatment.

Emerge feeling instantly revived

Continue your day and enjoy your mind & body feeling instantly rejuvenated as the vitamins and minerals are infused directly into your bloodstream giving you the valuable nutrients you need.