An amino acid found naturally in green tea, associated with calm, relaxed focus without drowsiness.
L-Theanine is an amino acid found naturally in green tea leaves, well known for promoting a state of calm alertness without sedation.
It anchors MemoGuard's stimulant-free focus layer, the ingredient most responsible for the formula's caffeine-free positioning.
Studies indexed on PubMed Central have examined L-Theanine's relationship to attention and alpha-wave brain activity, a pattern associated with relaxed, sustained focus.
This describes general research on L-Theanine itself, not the finished MemoGuard product, which hasn't been the subject of its own clinical trial. See the full ingredients list or the formula overview for more.