{"version":"1.0","type":"card","id":"d906df98-0ddf-49ec-9c4d-7d1fb692768f","url":"https://stacklist.com/card/d906df98-0ddf-49ec-9c4d-7d1fb692768f","title":"l-theanine: From tea leaf to trending supplement","source_url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC12892352/","note":"L-theanine is a unique non-protein amino acid found abundantly in tea leaves. Interest in its potential use as a dietary supplement has surged recently, especially claims related to promoting relaxation and enhancing brain health.","image":{"url":"https://ucarecdn.com/2ff162d3-5e20-41e3-8663-cc863fdda3f9/","alt":"l-theanine: From tea leaf to trending supplement","width":1316,"height":689},"stack":{"id":"385684d9-7da2-44a5-9f77-c971f5611932","title":"The Chemistry of Calm Energy: LSC100 Caffeine & L-Theanine Science","url":"https://stacklist.com/stack/385684d9-7da2-44a5-9f77-c971f5611932"},"created_at":"2026-08-18T00:41:44.551Z","updated_at":null,"aco":{"summary":"L-theanine is a non-protein amino acid from tea leaves that has gained popularity as a dietary supplement for brain health and relaxation, though scientific evidence remains limited. While some studies suggest potential benefits for alpha waves, stress reduction, and cognitive performance when combined with caffeine, rigorous human clinical trials are lacking and the science does not yet match the marketing hype.","tags":["l-theanine","brain-health","dietary-supplement","cognitive-function","green-tea","relaxation","clinical-trials"],"key_entities":[{"name":"Roderick Dashwood","type":"person","confidence":0.95},{"name":"Francesco Visioli","type":"person","confidence":0.95},{"name":"Texas A&M University","type":"organization","confidence":0.95},{"name":"University of Padova","type":"organization","confidence":0.95},{"name":"IMDEA-Food","type":"organization","confidence":0.9},{"name":"l-theanine","type":"concept","confidence":0.99},{"name":"epigallocatechin-3-gallate (EGCG)","type":"concept","confidence":0.9},{"name":"Texas","type":"location","confidence":0.95},{"name":"Italy","type":"location","confidence":0.95},{"name":"Spain","type":"location","confidence":0.95}],"classification":"analysis","language":"en","confidence":0.85,"provenance":{"model":"claude-haiku-4-5","tool":"@stacklist/be@0.1.0","confidence":0.85,"timestamp":"2026-08-18T00:41:50.456Z"},"token_counts":{"approximate":14646,"cl100k":15430},"content_hash":"sha256:ff06d08cb5dbd71a7288c5e58a586b263188e878a679f30db0bc949f341f7a4c","acp_version":"0.2","body_available":true,"body_tokens":14646,"visibility":"public","agent_accessible":true,"status":"final"},"_links":{"self":"/api/public/card/d906df98-0ddf-49ec-9c4d-7d1fb692768f.json","html":"https://stacklist.com/card/d906df98-0ddf-49ec-9c4d-7d1fb692768f","md":"/api/public/card/d906df98-0ddf-49ec-9c4d-7d1fb692768f.md","stack_json":"/api/public/stack/385684d9-7da2-44a5-9f77-c971f5611932.json"}}