Light roasts vs. dark roasts | Coffee basics and science explained

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Published 2021-04-17
Thanks to Trade Coffee for sponsoring this video! Get 50% OFF your first bag of coffee with Trade Coffee when you use my code Ragusea50: cen.yt/traderagusea7

Thanks to Leticia & Harry Hutchins at Alma Coffee in Canton, Georgia: myalmacoffee.com/

"Comparative study of polyphenols and caffeine in different coffee varieties affected by the degree of roasting," Food Chemistry
Volume 129, Issue 3, 1 December 2011 (not free): www.sciencedirect.com/science/article/abs/pii/S030…

All Comments (21)
  • @jameshoffmann
    Very happy to see coffee making an appearance on your channel, and especially delighted to hear about your increasing (and quite correct) obsession with great coffee…
  • "I'm a fan of Light Roasts, for reasons we will get to." My mind: "It's the acidity"
  • @bretwilliams249
    I really appreciate when you don't hide sponsorships and manage to make an interesting video out of it. Cheers!
  • Great video! Just one scientific note: Caffeine is one of the most stable compounds in nature. It does not degrade at the temperatures used in roasting. It sublimates at 178ºC at atmospheric pressure. However, at the high pressures within the beans during roasting (up to 6 atm), it does not sublimate. As the temperature increases, part of the caffeine is lost to the exhaust gas as it is dragged by the water vapor coming out of the beans. Caffeine is only moderately soluble in water at ambient temperature but its solubility increases to infinity as the temperature is increased to 100ºC. In the 1940s, the caffeine used in Coca-Cola formulation was extracted from the stuff scraped from the coffee roasters exhaust pipes.
  • @alexneal7598
    I WAS THERE! Adam, great to meet you very briefly the day you filmed at alma. (I had the puppy) blew my mind when I walked in and you were there filming! I went total fan guy mode. I'm honored know Harry, Leticia, and the crew well. Trade Coffee really knows what's up if they chose Alma to be featured. great video!
  • Of course it’s not the roast that determines how much energy you get out of it..... It’s how much you drink.
  • @lettuce1626
    Interviewing your sponsor for a video is next level
  • @Oizys13
    idk why but when pumped up kicks randomly started playing at the end I laughed.
  • I can attest to the ethics of trade. When the coffee company I worked for fired all of its employees for unionizing and it became clear that they had done so illegally, trade, their biggest contract, pulled them from circulation. It was a big deal for us trying to get some sort of communication from the owners. It was called Augie’s coffee btw
  • @fandcljosh
    After a cereal video not sponsored by magic spoon, its great to have a coffee video sponsored by trade
  • @testtest-ol3yi
    growing up with only public television loaded with mostly infomercials really groomed me into watching stuff like this
  • @christineh4398
    5:58 There's this brand of instant Vietnamese coffee I used to buy and people thought i was having a stroke because to me it had an aftertaste of popcorn. I'm glad to know I wasn't crazy after all these years
  • “I only recently became a coffee obsessive.” Welcome to the dark side, Adam.
  • @dumbdog611
    “you can be confident that your beans are ethically sourced...they have to sign a pledge” ahh just like how teenagers did to avoid drugs since 5th grade lol
  • @adog3129
    i know everyone talks about the smooth sponsor transitions, but this time, i genuinely am not sure where the line is between the video and the sponsor.
  • @andrew4363
    Do you want your coffee rare or well done?
  • Adam your hunger for new knowledge, and tenacious personality makes you one of my favorite YouTube producers. You're more than just a chef, you're an educator. Glad I found your channel a couple years back. Excellent work! 🍶🍗👉
  • @seyhanbulut1837
    It's crazy how even his ad videos are really well made and interesting, great job all around and one of my favorite channels and youtubers
  • @junkredo2518
    I think you’re the only one here that can make an entire video a commercial and still be entertaining and informative. Cheers.