This is a review of L-Theanine by Jigsaw Health. L-Theanine claims to help you achieve a balanced mood by promoting relaxation and supporting focus.

Basic Information: What is ‘L-Theanine’

L-Theanine is a nutritional supplement which is made from Suntheanine. Jigsaw’s L-Theanine is the only pure form of L-Theanine on the market – making it superior to other supplements which are cut with cheaper products. It claims to help you achieve a clear mental state by easing the effects of stress, caffeine and even a mild hormonal imbalance.


Take one capsule after each meal (breakfast, lunch, and dinner) but only if you feel it necessary. Do not take it in the late evening. Always consult a  healthcare professional before taking this supplement.

Before taking this medicine

The only ingredient in Jigsaw Health’s L-Theanine is Suntheanine. L-Theanine claims to be purely made with Suntheanine and not cut by any other cheaper ingredient. It also claims to be pharmaceutical grade. Suntheanine is said to be found almost exclusively in tea. Suntheanine is not an extract but it is product produced via fermentation. Suntheanine is manufactured in Japan by Tayo International.

L-Theanine also contains cellulose, magnesium stearate, and silica.


One bottle is available for $19.97. Jigsaw offers a bulk buy of 3+ bottles for $16.99 per bottle.

What to Expect

Suntheanine- the ingredient in L-Theanine is an amino acid found in tea. Suntheanine stimulates alpha waves in your brain which is associated with a mental state is that is both relaxed and alert.

Jigsaw’s L-Theanine claims that there are no side effects with this supplement.

Keep an Eye Out

Suntheanine is produced from the fermentation of tea. While Jigsaw Health claims that there are no side effects of L-Theanine (Suntheanine), it is important to remember that an over indulgence in tea itself may lead to side effects that are similar to an overindulgence in alcohol.

Jigsaw Health does not specify whether or not the alcohol produced in the fermentation process has been kept in the product or strained out. If you must avoid alcohol, you should avoid this product.

Manufacturer’s Commitment

Jigsaw has protected their supplement with over 60 patents regarding its manufacture and use. Their website does not list any reviews. However, they do offer a 90-day ‘hassle free, full money back guarantee’ including the cost of shipping. They do not require you to send back the product if you are unhappy.

The Bottom Line

L-Theanine is created from Suntheanine which is derived from tea. This is it’s only ingredient. You are able to derive more intense benefits from this supplement than from directly drinking tea because of the fermentation process involved in creating Suntheanine. This fermentation process creates alcohol, however, it is not clear whether this is removed from the product. This product has not been evaluated by the FDA and there are no consumer reviews for this product online. Jigsaw Health does not provide any clinical studies or medical information surrounding their product.

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