Green tea lovers will no doubt be very familiar with L-theanine. This is because it is the ingredient responsible for the distinctive flavour of this type of tea, occurring naturally in its leaves. L-theanine is a non-protein amino acid linked to a variety of properties. It can be supplied to the body in smaller quantities by preparing a cup of this aromatic tea for yourself, or you can choose a proven dietary supplement. Such a product is offered by the respected brand Doctor's Best.

L-Theanine - dietary supplement in swallowable capsules

The Doctor's Best L-Theanine with Suntanine, 150 mg dietary supplement comes in the form of swallowable capsules, with 90 in one pack. It contains L-theanine (as Suntheanine) and is suitable for use by those on exclusion diets.