{"version":"1.0","type":"card","id":"07e4cad5-32c2-44d2-a77b-0ff1bb4f5d52","url":"https://stacklist.com/card/07e4cad5-32c2-44d2-a77b-0ff1bb4f5d52","title":"Caffeine 6 Hours Before Bed Still Cuts Your Sleep","source_url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC3805807/","note":"Journal of Clinical Sleep Medicine study: 400mg of caffeine taken six hours before bedtime still reduced total sleep by more than an hour, and participants didn't notice.","image":{"url":"https://ucarecdn.com/e72b30b3-1193-4eff-88ff-a3b47c5ae187/","alt":"Caffeine 6 Hours Before Bed Still Cuts Your Sleep","width":1500,"height":1000},"stack":{"id":"4dffb12a-725e-4048-883c-4782b5959050","title":"Know Your Dose: LSC100 + Caffeine Dosing & Delivery Guide","url":"https://stacklist.com/c/wellness/stack/4dffb12a-725e-4048-883c-4782b5959050"},"created_at":"2026-11-02T15:21:10.203Z","updated_at":null,"aco":{"summary":"Caffeine consumed 6 hours before bedtime significantly impairs sleep quality and duration. This research demonstrates that caffeine's effects on sleep persist well into the evening, affecting circadian rhythms and sleep architecture.","tags":["caffeine","sleep","circadian-rhythm","sleep-deprivation","health-science","timing"],"key_entities":[{"name":"caffeine","type":"concept","confidence":0.95},{"name":"sleep","type":"concept","confidence":0.95},{"name":"circadian-rhythm","type":"concept","confidence":0.85},{"name":"PMC/NCBI","type":"organization","confidence":0.9}],"classification":"reference","language":"en","confidence":0.85,"provenance":{"model":"claude-haiku-4-5","tool":"@stacklist/mcp-server@2.0.0","confidence":0.85,"timestamp":"2026-11-02T15:21:14.341Z"},"token_counts":{"approximate":33,"cl100k":25},"content_hash":"sha256:ffcc01c42fd7d904e5342c01fad7f9b5014d849c2d05a81b22965ba596c193a3","acp_version":"0.2","body_available":true,"body_tokens":33,"visibility":"public","agent_accessible":true,"status":"final"},"_links":{"self":"/api/public/card/07e4cad5-32c2-44d2-a77b-0ff1bb4f5d52.json","html":"https://stacklist.com/card/07e4cad5-32c2-44d2-a77b-0ff1bb4f5d52","md":"/api/public/card/07e4cad5-32c2-44d2-a77b-0ff1bb4f5d52.md","stack_json":"/api/public/stack/4dffb12a-725e-4048-883c-4782b5959050.json"}}