L-Theanine – 60 vcaps

Life Extension L-Theanine delivers 100 mg of Suntheanine per vegetable capsule — the only pure-form L-theanine protected by 40 US and international patents. Unlike some competing products that contain a mix of L-theanine and the unevaluated D-theanine form, Suntheanine is exclusively the L-form, verified through independent laboratory analysis. Each pack contains 60 vcaps, with a recommended daily dose of 2 capsules providing 200 mg.

L-theanine is the predominant amino acid found naturally in tea and is widely recognised for its calming, mood-supporting qualities. It works by encouraging alpha-brain wave activity — the electrical patterns associated with a deeply relaxed yet alert state of mind — making it a popular option for those looking to take the edge off a demanding day without drowsiness. So well regarded is theanine in Japan that it is routinely added to soft drinks and chewing gum as a relaxation aid.

Suitable for vegetarians and vegans, these capsules mix effortlessly into any supplement routine. Life Extension is a long-established American brand with a strong reputation for quality sourcing and transparency, making this a dependable pick for anyone prioritising both purity and peace of mind.