Search Supplements & Articles
Your Account
Speedy Quick Re-Order
View your Shopping Basket
SUMMER SAVINGS - Save £3 On Your Order -  PROMO CODE: JVCF22A   Min Order £15, Ends 23:59 4th July

L-Theanine Capsules - 200mg

Pure, strong and potent L form of theanine from high grade material

191 reviews9410020
- Best Price
Only 10.8p per capsule
In stock
In Stock

Key features

  • Heavily researched amino acid
  • Found most commonly in tea leaves
  • May promote calm without drowsiness
  • Commonly taken alongside 5 HTP
L-Theanine 200mg capsule view
Capsule Size
21mm x 7mm two-piece capsule
  • Description
  • Product Information
  • Feefo Reviews Reviews

L-Theanine is an amino acid found predominantly in tea.  When you have a stressful moment or a shock a 'cup of tea' one of the first things that come to mind but why? The reason is thought to be L-Theanine which is believed to promote a calming and relaxing influence.

If you are a coffee drinker it's likely that at some point you will have drunk too much and experienced a 'hyper' effect.  It is very doubtful that you have ever experienced the same thing with tea even though it contains a lot of caffeine and the reason why is thought to be theanine. It is thought that theanine works to offset caffeine's effect but without causing any drowsiness. It is also a supplement which is not known to be addictive.

Pure, strong and high grade material

Just Vitamins L-Theanine provides 200mg of this high-grade amino acid in a vegetarian capsule.

Nutritional Information
One capsule typically provides 200mg of L-Theanine
Allergen Advice
Ingredients containing allergens are highlighted in bold in the ingredients list. 
List of Ingredients
L-Theanine, Bulking Agent (Stoneground Rice Flour), Hydroxypropylmethyl Cellulose, Anti-caking Agent (Rice Hulls), Rice Extract (with Rice Hulls, Gum Arabic, Sunflower Oil).
Dosage / Suggested Intake
Swallow one or two capsules per day with food or as directed by your health professional.
Legal Category
Food Supplement with L-Theanine


Customer Reviews for L-Theanine 200mg

The views expressed below are the personal opinion of Just Vitamins customers. Just Vitamins does not endorse these views, nor should they be regarded as health claims or medical advice. All reviews are collected and verified as genuine by a 3rd party called Feefo.

Overall product rating 9.4 / 10 - 191 customers have independently reviewed and recommend L-Theanine from 191 reviews (showing latest 25 reviews)
Review Date
Review Details
Service rating: I have been a customer for years, eveything was always good, however this time I waited for my delivery longer than usual. But I trust the quality of their products. And I like their packaging.
Product: I haven't noticed the results yet (theanine 200 mg but I have high hope)
Great packaging, fast delivery
Service rating: Prompt service and no problems with delivery - pouch easily posted through letterbox.
Product: Nothing adverse and helps with sleep and anxiety
Service rating: Excellent product
Product: It really works! When you take 2 together I can feel i huge difference
Service rating: Fantastic price, great product. Would give 5 stars but...

Delivery was a few days late even after paying £7 for delivery, so i do not recommend getting that.
Product: Taking 3 of these at once alongside coffee. This counterbalances my Asperger's natural passive-anxiety and the coffee increases my focus for work. Generally you should take 2:1 ratio of L-Theanine to Coffee, but if you have much more passive anxiety then the coffee will increase it. So personally I must do 3:1
Service rating: Easy website to navigate, fast delivery and excellent products.
Product: I only take one in the evening and find this perfect for calmness and relaxation and then restful sleep. Would highly recommend to anyone feeling a little anxious and needing some support.
Service rating: Delivery arrived quick enough but the products arrived with short shelf life, that is not acceptable. As for the product I purchased to help with sleep but in fact the opposite happened. I tried for 3 days with Magnesium but after 3 night of absolutely no sleep I gave up.
Product: Does not work for help with sleep, in fact they kept me a wake. Some calming effect but not for me.
Service rating: Excellent product and delivered promptly. Pouch delivered through the letterbox.
Product: Excellent product to help calm anxiety.
Friendly attention and on time delivery.
Delivery was very quick and efficient, I’m a big fan of the packaging as it’s compact, saves me space, and it fit through the letterbox! Customer service was spot on, I had no issues with anything
Service rating: Excellent service and fantastic prices for top quality products
Product: Amazing product. Recommended to others. Really helping with my anxiety. Helps take the edge off whilst allowing me to stay alert and carry on with my day.
quick useful email support
Speedy delivery, fab prices
Fast delivery. Quality item
Prompt service and value for money product.
Good and expedient service.
Service rating: Great price and excellent fast delivery. Will certainly be buying from them again soon.
Product: Great value for money. This supplement helps with my anxiety
Service rating: Rigth on time,good product
Product: Lowered my anxiety to a decent leve
Service rating: Always reliable and trustworthy
Excellent service and products. Thank you.
Product: Calm me down. Good stuff to take...
Service rating: I found the 400mg of l theanine too strong for myself and had already purchased 3 pouches in the 3-4-2 but just vitamins were so kind and understanding and gave me a full refund on return of them. Because of how lovely they were and knowing I still wanted to take l theanine i purchased the 200mg which I’ve been taking for weeks now and find very helpful in calming my overactive mind. I think once I’ve gotten use to the 200mg for many months I might try the 400mg but purchase just 1 bag and see how I get on. I cannot fault just vitamins customer service care, I truly felt looked after. Thank you.
Product: I’m a novice user of l theanine so I prefer this lower dose of 200mg. I’ve taken it for weeks now and it really helps calm my overactive mind. I’d highly recommend for anyone who is suffering with anxiety and too many thoughts whirring around your head like a washing machine. I’d reccommend starting with lower strength and building up to 400mg if your new to l th
Service rating: Really fabulous. My usual stockist let me down, and these supplements are so important to me, so I found Just Vitamins and thought I'd give them a try. Great product, even better price than expected, fast delivery and letterbox-friendly packaging, so I didn't even have to be home to take the parcel.
Product: Really great supplement, exactly as destined and the correct dose for my needs. I take it for generalised anxiety alongside rhodiola rosea in a nootropic stack. L-theanine is one of the few that doesn't cause heavy sedation or fogginess, so you maintain mental clarity, but remain calm. Also alleviates the constant racing heart I get from my reactive hypoglycemia condition. Life-changing supplement!
Service rating: Very simple, straightforward process, very easy to order, received my order promptly and I am totally happy with their quality. Fabulous service!!
Product: I think they are a good quality supplement. I have been suffering from anxiety and nervousness and these help to calm me down.
Service rating: Satisfied with items and delivery service will recommend the company to friends.
Product: Good for sleep problems and depression.
Service rating: Very good in delivering watt they promiss to
Product: i only left 1 star because i think its always room 4 improvement in everything,very nice

Frequently bought together