Caffeine & Ketosis: Friend or Foe?

A lot of times I’m asked about the impact of caffeine consumption on ketosis. Does it help? Hurt? A new study out of Canada seeks to answer this question.

  • Lynn Dell

    I wonder if this is a possible explanation as to why coffee consumption is associated with decrease in onset of type 2 diabetes. Interesting!

    • voyager360

      I’m a big guy and have OSA (Obstructive Sleep Apnea). I have the Darth Vadar style full mask, and O2 supplementation. My O2 levels are up, my weight is coming down and I have 5+ cups of coffee per day helping my weight loss and now I know why.. Thank Dr. Perlmutter. Wonderful explanation for someone like me that works a lot at the computer developing AR / VR software.

  • Luc Chene

    So having black coffee with 15 to 20 grams of coconut oil must be very good for ketosis!
    By the way black coffee with coconut oil and blended for 30 seconds is unexpectedly delicious, it tastes like coffee latte! To me the taste is even somewhat sweet despite the absence od any suger.

    • David Perlmutter

      Something Dave Asprey was onto.

  • herman hudson

    I drink my coffee black. After all it’s coffee not hot chocolate:-)
    Try Monsoon Malabar or Ethiopian Harrar.

    • David Perlmutter

      Straight coffee is the best option.

  • Robin

    I wonder if it is really the caffeine or if it is something else in the coffee. It would be interesting to repeat this study with a decaf option.
    Because of a seizure disorder, caffeine is off the menu for me.

    • Lirpa

      Sorry to hear that. I wonder, is your seizure disorder related to a specific genetic mutation? My husband gets aura migraines with Coffee, even decaf.

  • Easy Anderson

    Thank you. Great synopsis Doc. 🙂 Much appreciated.

    • David Perlmutter

      Thanks for watching!

  • Karen Adrienne Schuon Zarn

    Coffee plant: One of the good plants in the Garden of Eden to eat freely of! Sugar cane, not so much!

  • Rochelle

    Interesting study. I like black coffee, so it’s good to know… Thank you.

    • David Perlmutter

      Black coffee is the best option. Free of excess sugar and dairy.

  • Ronna Berezin

    Does coffee raise blood pressure?

  • RJ

    I was surprised to see that the body could produce ketones with over a day’s worth of Carbs at breakfast.

  • Steve the Jeffersonian


    What’s the answer? Drink coffee or not?

  • Matilde Gomez

    I recently listened to the brain warrior’s way podcast : Is Coffee Beneficial or detrimental to your health with Dr.Daniel Amen and they explained that even the caffeine contained in 1 cup has an impact of the blood flow to the brain: it restricts the blood flow. I find it challenging to take in all the information and make my mind

  • Daryl

    Coffee is extremely acetic and can cause ulcers Caffeine also raises blood pressure Cancer cells proliferate in acidity It’s not a health drink !

  • Ronna Berezin

    You don’t answer questions that veer from your topic and discussion; there’s lots of research that disputes your research . pls comment.

    • David Perlmutter

      Ronna: Do my best to get to as many questions here and on social media that I can.

  • Wolfgang

    What about creme in my coffee? Is that okay? ?

    • David Perlmutter

      A drop is acceptable.

  • Krystal Kouvaras

    Coffee is a wonderful drink. I have bulletproof coffee every morning for breakfast and I feel great and not at all hungry

    • David Perlmutter

      Great way to start the day!

  • pd

    I love my morning coffee with 2t MCT oil, 2t butter and 2T of beef gelatin (my joints thank me every day;) all whisked in a mixer, keeps me satisfied till lunch time.

  • Iina Lohi

    Hi, just wondering if anyone has any opinions on whether there is too much fat in the following recipe for a dairy free blended coffee?
    1 cup (300mL) plunger coffee
    1 tablespoon MCT coconut oil,
    half tablespoon grass-fed unsalted butter,
    one drop of organic peppermint oil,
    1-2 buttons of cacao butter,
    1/8 teaspn of vanilla powder and
    1 teaspn of cacao.
    It’s delicious!!

    • Jessie Willson

      Butter is dairy.

    • Cristofano

      Why would you think this is “too much” fat?

      • argo95

        Nottin wrong with fat …while in ketosis, that is what your burn. But still gotta watch caloric intake …you still require that deficit to lose the weight

  • Stephanie Moss

    What about coffee/caffeine and autophagy? Does black coffee halt autophagy? I’ve heard yes and no.

  • Adolfo Ochoa Muner

    thanks doc. perlmutter, i was wrong and my family and friends too… i was not crazy i was 100 per cent ciliac,,,, thanks for all the help..

    • C Wilson

      What is “100 per cent ciliac?”

  • Carol Brenner

    Caffeine,however, competes with dopamine output.

  • lynette mayo

    Why does Dr.Kelly Brogan AVOID caffeine?

  • Honeybugz

    Thanks Dr. P. I am in ketosis and managing it well. I occasionally have a coffee and prefer with a dash of cream, milk or sometimes a cappuchino. Would you say there could be a sliding scale of effectiveness starting with black coffee as most effective through to a whole milk coffee or does the milk negate the effect?

  • Shakti Carola Navran

    I am a black tea drinker. How about that form of caffeine? I don’t handle coffee well…

  • Shakti Carola Navran

    What about Black Tea? Will it do similar?

  • Roy Knight Jr

    I’ve been on a coffee, tea, milk and bacon diet for the last year and this explains why I’ve been able to complete 7 books in that time. Although I throw in yogurt, cheese, raw nuts and other meats, I eat as few carbs as I can. Even my milk is raw milk that still has lactase in it to predigest the lactose. I’ve recovered in 4 years, since I quit eating carbs, more of the brain I lost in a severe closed head injury 33 years ago than what I did prior in 29 years. The BDNF production in this diet has saved me from sure doom. My books prove it. My hope is that when people see my name, they see the same thing they see in Dr Perlmutter’s name and that’s a “cure” instead of just treatment. Thank you Dr Perlmutter, “It’s Time for a Cure” and thanks to you, I know about it.

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