Lamberts L-Theanine 200mg 60 Tablets


Lamberts L-Theanine 200mg 60 Tablets

Availability: In stock

£3.99 UK Delivery FREE over £50.00. Delivery usually in 3 days


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Lamberts L-Theanine 200mg 60 Tablets contain this fascinating amino acid that is present in normal tea and is believed to be responsible for that unique ‘nice cup of tea’ feeling. 

L-Theanine supplements have become particularly popular in the USA and have been shown to raise levels of GABA and alpha waves in the brain. This can result in a calming effect without drowsiness. Studies have also shown that theanine may help reduce the negative effects of stress, prevent the symptoms of flu, improve cognitive performance, relieve depression and shows promise as a weight loss aid.

  • 60 Tablets.
  • Provides 200mg of theanine.
  • Assists improvements in cognitive function.
  • Aids in the reduction of stress
  • Fast acting supplement.
  • Boosts immunity.
  • Suitable for vegetarians.
  • A popular weight loss aid in the US.

Unlike most supplements that need to be part of a regime for several weeks before any effect may be noted, Lamberts L-Theanine responds within the first few hours of use.


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Theanine is an analog to glutamine and glutamate, and can cross the blood–brain barrier. The L-enantiomer is the form which is found in tea and used as a supplement by humans. It was discovered as a constituent of green tea in 1949 and was approved in Japan in 1964 for unlimited use in all foods, with the exception of infant foods. It also provides a unique umami (brothy or savory) taste and flavor to green tea infusion. In 1950, the tea laboratory of Kyoto successfully separated theanine from gyokuro leaf, which has high theanine content.

At present, little is known about the safety of long term theanine supplementation. Theanine is generally considered safe when consumed in green tea, however due to caffeine content the National Institutes of Health advise against drinking more than five cups of green tea daily. Excessive consumption of green tea may trigger certain side effects, which include headaches, insomnia, irritability, diarrhoea, and heartburn.

Directions of use


Take 1 Lamberts L-Theanine Tablet daily with a meal, or as directed by a practitioner or pharmacist.


  • Do not exceed the recommended daily dose.
  • Keep away from children.
  • Food supplements should not be used as a substitute for a varied diet.
  • Do not take if pregnant or breast feeding.


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A white coated oval tablet.

Each tablet provides:
L-Theanine 200mg

Tableted with:
Calcium Carbonate, Cellulose, Tablet Coating (Hydroxypropyl Methylcellulose, Colour: Titanium Dioxide, Glycerin), Silicon Dioxide, Stearic Acid, Magnesium Stearate.


Orders under £50:

Royal Mail £3.99 delivery within 1-3 working days from dispatch.


Orders over £50:

Free Delivery within 1-3 working days from dispatch.


UK delivery charges are charged at a flat rate. This means regardless of what you order, they will not increase. Standard UK £3.99 delivery is sent using the Royal Mail TRACKED 48HR service and your order will be delivered within 2-3 days. Free UK delivery is sent either by Royal Mail TRACKED 48HR or via a Courier. For international deliveries please check our delivery page .

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