A 24-hour (whole day) fast can be a great tool you can use every now and then to break through a weight-loss plateau and to improve your health.
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If you’re Keto-adapted, you’re going to have a much easier time on a 24 hour fast than somebody who is not (or just starting out) on a low-carb, Ketogenic Diet. If you haven’t, I recommend you try intermittent fasting first (eg. have your last meal at 7 PM the night before and don’t eat until 12 PM the next day) and depending on how well you felt, consider trying a whole day fast.

In my opinion, the easiest way to approach a 24-hour fast is to have an early, satisfying dinner at say 5-6 PM – you’re going to feel full for that evening and this way, the time until your next meal won’t feel quite as long. Make sure to do this on a day off, when you’re not stressed. Go out for a walk, get some sunshine, but don’t go for a workout or anything similar the first time you try it. It can be a lot of fun (even more so if a friend/girlfriend joins you on the fast!) and a great way to challenge yourself.

Make sure to drink lots of water and have some coffee or tea whenever you like. You can also drink some bone broth (I had two cups and added a soup bouillon cube for extra sodium) to help you get your electrolytes and to serve as sort of a meal replacement in case you get hungry.

Take into account that your stomach is likely going to shrink a little after such a long fast, so don’t expect to be able to eat your usual meal portion right away! Personally, I consumed less food than usual for dinner after my fast and still felt less hungry the next day – chances are, you’ll feel the same. Apart from having an entire 24 hours without consuming any calories (apart from the broth), your reduced hunger afterwards is another reasons why it can be a great way to lose weight!

Have you ever done a 24-hour (or longer) fast? Why/why not? What was your experience? Let me know in the comments! Also make sure to write about how it went if you decide to give it a try!

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10 Replies to “24-hour Fasting on Keto – Lose fat & Challenge yourself by Fasting a whole day”

  1. Excellent info Angelo. I say, the best videos on Keto and lots of great common sense advice.
    I'm doing the 8/16 fasting and I feel great. Today it went into 18 hours and felt very good.

    My question is, if you're doing 8/16 fasting, how often do you add the 24 to this fasting? Like one day a week?

  2. after being on a keto diet and in fat adapted state…. intermittent fasting does exactly what he is saying. I've been on keto for 4 months…and have been doing 16 hr fasting for the past 3 days now. I have mental clarity, amazing energy, feel great and like in this video….. it's great to feel free from food. I am going to try this 24 hr to see what happens…I eat cuz I feel I have to not cuz I'm hungry. hmmm?

  3. Hey Angelo – I love the approach you've been sharing through all of your content.

    Have you read into the immune benefits of extended water fasts? There's a lot of interesting research about the benefit of 2-3 day fasts that I think you'd appreciate.

    Personally I've found 36 hour fasts to be much more rewarding than 24 hours; I've tried both. I'll always start my fast after dinner, and I've noticed that when I break it with dinner 24 hours later I don't feel as great as when I break it with breakfast ~36 hours later.

    Food for thought :)

  4. Haha great video, I can't wait to see more from you! I left a like on the video and checked out your other vids. Keep up the good work, maybe we could collab on a video sometime, check out my channel and let me know:)
    – btw i fast on keto too its great but hard to do

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