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I Did Caffeine Analysis: Some Unexpected Results!

Definitely some surprises in this one for me! I suspect this is a topic that I'm not yet done with, so very interested to hear your thoughts or suggestions for future tests! Related videos: Caffeine Explained:    • Caffeine: Explained   Wired Coffee Support:    • James Hoffmann Answers Coffee Questio...   Timestamps: 0:00 Intro 0:53 How the analyser works 2:39 Test 1 Filter vs. Espresso 3:59 Test 2 Cumulative Extraction 7:53 Test 3 Contact / Steep Time 9:17 Test 4 Instant Coffee 13:28 Test 5 Light vs Dark roast 16:42 A Note On Caffeine Variance in Different Coffees 18:09 Wrap Up Links: Patreon:   / jameshoffmann   Limited Edition Merch: https://geni.us/TensHundredsThousands Instagram:   / jimseven   Twitter:   / jimseven   My Books: How to Make The Best Coffee At Home*: https://geni.us/howtomakethebestcoffee The World Atlas of Coffee*: http://geni.us/atlasofcoffee The World Atlas of Coffee Audiobook*: https://bit.ly/worldatlasofcoffeeaudio The Best of Jimseven: https://geni.us/bestofjimseven Things I use and like: My glasses: http://bit.ly/boldlondon My hair product of choice*: https://geni.us/forthehair (*Affiliate links which may earn us a commission)