You are here:



OFFER > Buy 2 Get 1 FREE - Add 2 to the basket - Get 1 Free (of the same product)

Double click on above image to view full picture

Zoom Out
Zoom In


L-Theanine is an amino acid, found in tea leaves, that is used to support the relaxation response, sleep quality and memory.
Size: 60 Capsules
Product Code: 2400

In stock


Free delivery on UK orders over £25. All prices shown inclusive of VAT, except where stated. Place order before 12pm and we will despatch your order the same day.

Tell your friends:

Facebook Twitter Email a friend


L-Theanine is an amino acid, found in tea leaves, that is used to support the relaxation response, sleep quality and memory.

  • L-Theanine supports the production of alpha brain waves which are associated with a state of relaxation. Meditation and daydreaming increase alpha brain waves, which are also present during REM sleep
  • L Theanine is not sedative but may help with falling asleep due to its relaxation effect. It has been shown to support sleep quality
  • L-Theanine supports the production of GABA (a calming brain neurotransmitter)
  • As it is not sedative L-Theanine can be taken during the day to support relaxation
  • L-Theanine may also have positive effects on memory and learning

L-Theanine 1 capsule will provide on average

Active Nutrient Strength %NRV*
L-Theanine 250.0mg *

+NRV = Nutritional Reference Value
* Indicates no NRV


L-Theanine, HPMC (vegetable cellulose, capsule shell), microcrystalline cellulose, stearic acid

Suggested Intake:

1-2 capsules daily preferably on an empty stomach, as a food supplement, or as directed by a practitioner. Do not exceed the recommended daily intake. This product should not be used as a substitute for a varied diet.

Suitable for:

vegetarians and vegans


If you are pregnant, breastfeeding or taking any medication please check with your doctor or practitioner before taking this product.

Non-Active Ingredients:

HPMC (vegetable cellulose, capsule shell), microcrystalline cellulose, stearic acid.

Non GM & Free From:

GMO, gluten, wheat, soy, dairy, added sugar, flavourings & colourings


Keep in a cool, dry place

Keep all supplements out of sight and reach of young children. Do not exceed stated recommended intake. Food supplements must not be used as a substitute for a varied and balanced diet and a healthy lifestyle. Adverse reactions to supplements are rare, but If you experience an adverse reaction stop taking the product and contact your practitioner or one of our nutritional therapists. Sometimes a supplement will suit one person but not another.

  • 16-Jun-2019

    Great product does what it says
  • 29-May-2019

    I have had similar success with this product as with 5-HTP Plus. Quite good, but not that effective in helping me to sleep. Not that effective with anxiety either.
  • 27-Mar-2019

    Ditto ditto ditto ditto!!!
  • 22-Feb-2019

    This has helped with sleep - to go to sleep quicker, to stay asleep, quality of sleep, and to get back to sleep if awake in the night
  • 30-Sep-2018

    In dowsing this product was recommended. I take it at night and have found since taking it I sleep very quickly, which is not always my sleeping pattern

    Our Response:

    Hi - good to hear of your experience. L-Theanine is very helpful in supporting deep relaxed sleep but is non sedative so can be used to help with the stress response during daytime too.

    best wishes
  • 16-Aug-2018

    Genuinely helping calm my mind and consequently helping to improve my general/social anxiety. Before this product I wasn't truly aware of how much anxiety I had when I went out. Since taking l-theanine (roughly 6 weeks) I don't feel half as sensory overloaded as I did before. I've not added anything else...
    Read More

    Our Response:

    That's great feedback, thank you! So pleased to hear how it is supporting you.
  • Show all reviews

    For UK-delivered orders that are under £25.00, we charge a nominal postage and packing fee of £1.95. UK orders above £25.00 are DELIVERED FREE OF CHARGE. 

    Dependent on weight, your order will either be sent by First Class post (Royal Mail) or via our nominated courier. A signature is required on receipt of the goods if delivered by our courier. 

    Please check all requirements (import taxes, customs regulations etc) regarding deliveries to countries outside the UK. Cytoplan Ltd cannot be held responsible for parcels that do not comply with the import regulations of the desination country.

    We cannot guarantee next day delivery, although you should receive your order within 2-3 working days. 

    If you have not received your order within 5 working days, please contact our Customer Services department.

    1. You can email our Customer Service department via our contact form here. 
    2. You can telephone on +44(0)1684 310099 
    3. You can write to us at Cytoplan Ltd, Unit 8 Hanley Workshops, Hanley Road, Hanley Swan, Worcester. Worcestershire.WR8 0DX


    You may also be interested in...

    In stock


    The amino acid Glutamine may be helpful for maintaining a healthy digestive system ...

    Full details

    In stock

    L-Arginine Plus

    The Amino Acids L-Arginine and L-Ornithine together have been shown to strengthen the ...

    Size:60 Capsules
    Full details

    In stock


    Cyto-Night is a formula designed for those experiencing sleep disturbances. It ...

    Full details