4 days ago
Big fan of l-theanine and
Big fan of l-theanine and these are good. Poss less effective than other brands but still seem to help sleep
Claire B.Verified Buyer
Try our at-home blood test
Clinic-level accuracy on 38 key markers. Results and recommendations in just 72h.
(6)
L-Theanine
£15.49
60caps
Pre-order for 02/10/2026, delivery 2–3 working days once available
Healf Zone members get free next day delivery on all orders.
1
Product description
Key Benefits
- Provides 250 mg L-theanine per capsule.
- Pure L-form amino acid.
- High-strength single ingredient formula.
- Small, easy-to-swallow capsule.
- Suitable for daily use.
Cytoplan L-Theanine provides 250 mg of pure L-theanine per capsule. L-theanine is an amino acid naturally found in tea leaves, particularly green tea.
This high-strength formula contains only the L-form of the amino acid in a simple, single-ingredient capsule. Designed for daily use, it offers a convenient way to include L-theanine in your routine.
The small capsule format makes it easy to take as part of a consistent wellbeing plan.
Why Cytoplan is Healf
Cytoplan brings you Bio-Effective®
supplements, formulated by Nutritional Therapists, that are designed to fill nutritional gaps with nutrients your body can absorb and use easily. The nutrients are delivered in a form that mirrors how they naturally occur in food, ensuring they are effectively recognised and utilised by the body. Plus, each product is manufactured in GMP-certified facilities and undergoes rigorous approval to meet all relevant legislation, ensuring you receive safe, high-quality, and effective solutions for your overall wellness.
Since its founding in 1990, Cytoplan has specialised in science-backed, food-based supplements tailored for healthcare professionals and their patients, with a focus on improving health through bio-effective formulations. Owned by a charitable organisation, the UK-based brand reinvests its profits into wellness initiatives and donates supplements to those in need–which not only supports individual wellbeing but also creates a meaningful impact within communities.
With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.
Learn more about each step—Brand Discovery, Expert Validation, and Community Testing—here.
Since its founding in 1990, Cytoplan has specialised in science-backed, food-based supplements tailored for healthcare professionals and their patients, with a focus on improving health through bio-effective formulations. Owned by a charitable organisation, the UK-based brand reinvests its profits into wellness initiatives and donates supplements to those in need–which not only supports individual wellbeing but also creates a meaningful impact within communities.
With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.
Learn more about each step—Brand Discovery, Expert Validation, and Community Testing—here.
Ingredients
L-theanine, anti-caking agent (microcrystalline cellulose, stearic acid), plant cellulose (capsule shell)
Suggested use
1-2 capsules daily taken on an empty stomach, as a food supplement or as directed by a medical practitioner.
Additional Information:
Food supplements and foods sold by Healf should not be used as a substitute for a varied, balanced diet and healthy lifestyle.
If you are pregnant, breastfeeding, have a medical condition, or are taking any medications, please consult with a healthcare professional before use. Use products only if the seal is intact. Store in a cool, dry place, out of the reach of young children. Do not exceed the recommended daily intake.
We make every effort to ensure that product information on our website is accurate and up to date, but packaging and ingredients may occasionally vary from images shown on site. Please refer to the product label and contact Healf before use if you have any questions regarding your specific allergies or intolerances.
You may also like
Reviews
- 22 days ago
This supplement has been really
This supplement has been really good for helping me to relax more
Megan D.Verified Buyer - last month
This was recommended by my
This was recommended by my nutritionalist. It seems to have helped a little.
Katie F.Verified Buyer - last month
Amazing
Really improved cognitive function, and my dreams have become so vivid and creative. Better focus whilst synergistically calm
Thomas H.Verified Buyer - last month
Part of my sleep stack.
I think this is part of my evening sleep stack. I have noticed that I do deeper and longer since taking it. It’s also a small smaller easy to swallow capsule.
Sophie T.Verified Buyer - 2 months ago
Helping me massively
Really helpful for aiding a full night sleep. I've tried magnesium too but that doesn't help like this does
susan T.Verified Buyer
Shop by collection
Frequently asked questions
How do we curate our products?
Every product undergoes our Healf Curation Process. With it, you can shop confidently knowing that every item has been tried and tested before it reaches you. Our Healf Curation Process includes three key steps: Brand Discovery, Expert Validation, and Community Testing. Through these, we assess quality, ingredients, effectiveness, and more, ensuring that every product empowers your wellbeing.
Do you have resources on how to enhance wellbeing?
The Healf Source offers detailed insights into different aspects of wellbeing, as well as guidance, research, recipes, and more to help you invest in your personal wellbeing journey. You can also subscribe to our weekly newsletters for the latest updates at Healf and in the wellbeing industry. Subscribe via the sign-up block at the bottom of this page.
How can I find out more about the ingredients in a product?
We love people who check ingredients as carefully as we do, so you'll find detailed information about the ingredients used on every product page (where applicable). If you see something you'd like to flag with us or have additional questions, please don't hesitate to get in touch—we'd love to hear from you.
Healf Curation Process™
Every product undergoes our rigorous Healf Curation Process, ensuring you are always getting the best when it comes to your wellbeing.
