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Why bad habits come back (you’re fighting two battles)
Episode 2119th February 2026 • The Momentum Experiment • Cat Mulvihill
00:00:00 00:16:30

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Breaking a bad habit for good means fighting two battles, and when you’re struggling long-term, it’s because you only fought one. Today’s episode shares the example of quitting sugar, what it can teach us about the two types of cravings we experience when trying to break bad habits, and what’s needed for long-term change.

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Recently, my friend asked me if the Momentum Formula could help her

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break her sugar habit. She could tell that it was impacting her

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health and she wanted to make changes, but she was feeling really stuck, like she

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could not seem to quit sugar and just eating sugar

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regularly. Now, I have spent more time than most people

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thinking about this because I actually used to practice nutrition and I

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worked with clients on this very issue, and I've

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also dealt with it myself. And so today I'm sharing the answer

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I told her about breaking the sugar habit But

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the answer is relevant to most bad

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habits that you wanna break. And I'm gonna talk about bad in a moment.

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There is a chance that you have broken a bad habit in the past only

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to find yourself right back again, maybe weeks or months later

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and wondering what happened there? Why didn't it last? And

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what's going on is that you only fought one battle when

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really there were two at play. So that's what we're gonna get into today

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is understanding the two different battles when we have

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something that we are, that has an addictive quality to

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it, what's going on there and how can we

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take this away into anything that we're trying to quit? Now

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I mentioned bad habits, so let's actually just take a quick

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moment for me to address the idea of the term bad. I actually don't

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like the term bad for bad habit. I'm referring

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to a habit with a negative consequence. So it is

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impacting some of your life, whether that is preventing you from doing

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something you want. Maybe it's derailing you from progress that's really important

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to you. It might be impacting your relationships or how you

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feel. I don't love the word bad because it does seem to imply

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judgment or suggest that you are bad for having

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that habit. And I actually don't believe that, but I'm

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realistic that most of us know when we say bad habit that we are talking

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about a habit that is negative and it has consequences, and it's so

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much easier to say break a bad habit instead of saying break a

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habit with negative consequences in your life. So I am gonna use the term, but

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I want you to know that this is not implying judgment, and it's really just

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a way for us to differentiate between a good habit and a bad habit. Does

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it add to our life or does it take away? So on that note,

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what can kicking sugar teach us about

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making lasting changes? And this is to look at

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it through the lens of two types of cravings that are going on,

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a biological craving. And a psychological

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craving. You could also think about this as desire. Let's

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start with biological. Now, with sugar in particular,

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your body starts to get used to a certain

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level of sugar in your system. And if you have

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ever quit sugar for any amount of time, you will notice

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that, well, one, there's an adjustment period and a withdrawal period where

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you might find that you have headaches. You might find you're constantly

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thinking about sugar or that you're actually starting to crave it

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more. Maybe after dinner you just feel like, I just really

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want some sugar right now. At least I know I have. But

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eventually after that adjustment period, whether it takes days or

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maybe a few weeks, you will start to notice some things like

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if you have fresh fruit, it tastes sweeter and you're actually

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enjoying it more. And then maybe later after you've been kind of off

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sugar, and when I say sugar, I'm talking about refined sugar. Processed,

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you know, desserts, all of that. I'm not talking about things that in nature, like

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fruit. But later, let's say you are

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at a celebration and someone offers you a cupcake or

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donut or something, and you eat it and you realize this is

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so much sweeter than I remember. Your body has adjusted to the point

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where now when you have something really refined and processed, it

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just hits and you might even feel sick. You might feel like this

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tastes so sweet, I can't even finish this. And you

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start to just, you, you could, you notice a huge difference because you have cut

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it out. Your body has actually adjusted to the levels of sugar in your system.

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And so you respond differently to something that maybe before you wouldn't have.

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Now, what often happens for people is that they slowly

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slide back. This can happen over weeks. It can

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sometimes, it can happen over days, but people will slip back into it.

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And then when they have that cupcake or that donut that at first made them

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feel so sick and felt so sweet, But now it doesn't, doesn't feel that

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way again. They're sort of sliding back into that because the body is

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readjusting in the other direction. And what's

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going on here is that you've had this example of

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you've, you've cut it biologically where you made that adjustment, but you

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didn't address the psychological cravings. And

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this is where you have this desire for sweets, even

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when on a physical level, your body has readjusted. You're not

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craving the sweets as much as you were, and you notice

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a shift, but you still feel like you are missing out. And

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that's the big part, is that the desire for them never left

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because you didn't actually tackle that part. You tackled the biological part

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and you quit it biologically, but you didn't necessarily quit

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the fact that you want it. So if you feel like you've been sacrificing, you

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feel like you are missing out, then you've only adjusted one thing.

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You've only fought one battle, and there's a second one at play, and often

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it is, it is kind of beneath surface, what's going on here

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is that you made a commitment to

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eat healthier foods and to have less sugar, and you probably also start to

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feel better and you've got the benefits. You might feel more energized, you might

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have steadier energy throughout the day, you might even sleep better. However,

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at the same time that you've made this commitment to these positive changes,

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you psychologically have this hidden commitment to

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avoid experiencing negative consequences. Like

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maybe feeling like you're missing out on celebrations or family

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traditions, or you feel like you are offending a loved one if you

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decline dessert when you're out together or at a meal that they created.

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Maybe you feel like you are losing a way to comfort

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yourself when you are feeling down or celebrating

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something really amazing. All of a sudden this thing is gone.

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You also might feel restricted or constrained or feel like

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you're being controlled by these arbitrary rules that say you cannot have it.

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And as long as you believe, even subconsciously, that

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these negative outcomes are possible, then you are likely to

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sabotage your progress. So you might accept

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the dessert from a loved one, even though you've been feeling pretty good without

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so many sweets, or you tell yourself you deserve a treat

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when you're feeling down or when you have something big to, to celebrate.

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And slowly you start to find yourself back there again. You're

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making all these exceptions, and even though

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you have made physical adjustments, if you don't adjust your

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mindset— and even in some cases, you might

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even make the appeal for sugar more because

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it's forbidden. It's this psychological pull or

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craving. It's not a physical one, it's a psychological one.

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Now let's compare that to a person who has actually worked

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on not just their biology, but their mindset about sugar.

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So someone who doesn't feel like they actually are missing out,

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that they feel just as content skipping dessert as they do when they

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have it, and they don't feel like not eating sugar

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is— it's not a restriction for them. It's just, it's a choice.

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They've chosen it. They don't feel like they're restricted because

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it's something that they made consciously and they feel okay with that. And maybe

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someone who just genuinely believes that sugar doesn't actually provide any form of

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comfort. And it doesn't necessarily make a celebration

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any better. So they have all these different perspectives and they see the world

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differently than a person who feels like I'm missing out, I'm

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being restricted, I'm holding back. Those people are white-knuckling it. They

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have to use willpower because they're trying to overcome these

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psychological cravings, even when they've calmed down the physical

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cravings. So people who have tackled the mindset, they don't feel like they're

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missing out and they, they actually don't desire it. Now,

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this example is about sugar, but this applies to

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any addictive habit because addictive habits

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are ones that impact our brain's reward center. It,

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it lights up our brain to say, oh, we wanna repeat this action. We

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wanna repeat this because we're going to get something good out of it. We start

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to desire things. We anticipate rewards. This

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is connected to dopamine. Dopamine. It makes us Crave

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things because we have realized, oh, when I do this, this good thing happens. I

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feel good, or I feel better. And so we start to associate it

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and we anticipate. So this can happen with even just scrolling on your

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phone. We know that the designers of so many of the

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apps designed it to make it addictive for our brains so that we're

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constantly picking up our phone. And I use this example

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because if you've ever taken a break from social media or tried to use

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your phone less, You might notice in the first few days you are

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constantly still reaching for your phone because you've been, you've kind of wired

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in this habit. And over time, as you start to break

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it, you notice that, okay, maybe I'm noticing my

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mood's improving. I'm not reaching for my phone as

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often. I'm spending time on other things. Maybe I'm having real

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conversations, reading a book, or getting back into a hobby.

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But if you still believe

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that you are missing out, you are going to feel a pull

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towards it. You might've changed the, the, the chemistry

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in your brain, so you're not reaching as much, et cetera, but there might still

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be this desire to be a part of it.

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And it's, in other words, you haven't challenged your mindset,

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so your brain is still thinking, you know what, it's still worth it.

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I still want this thing, even if I have broken this habit.

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And then you can slowly slip back into it. Now, if this

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feels familiar to you, or there's any kind of bad

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habit that you seem to break short-term but not long-term,

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this is first about being kind to yourself. That

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a lot of these products and addictions,

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there are very powerful, powerful forces with lots of money

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who are invested in you having these habits. Whether that is people on social

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media who want you to constantly be on your phone, or whether it's food

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industries that are making you constantly think about these foods.

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And they're also framing them as if they are part of celebration and

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that they are a regular part of our traditions. So you are

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constantly being bombarded with these messages, and there are people who are

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profiting off the fact that you have these. So let's just put that out there.

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So be kind to yourself. The second thing is I want you to get

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curious about why you have this desire for something that

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has negative consequences. So what are you gaining from

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it, or what do you believe you are gaining from it? And if you

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start to just be really honest of why do I

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want this, why do I feel like I am missing out, or why do I

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feel like even if I know there's harm, I still—

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I'm getting— you're getting something out of it. So what are you getting out of

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it? And then question if one, are you actually getting

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that thing out of it, or are you just attributing? Sometimes we just

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falsely attribute what we're getting with something when

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it's actually not. Like the idea of a celebration

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does maybe feels like a real celebration as long as there's cake,

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but in actual fact, you can celebrate something and not have any dessert

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and it's still a celebration. But in our mind, we might associate those things

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so we can falsely associate. You could falsely feel like you are connected to

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people. Through social media when in actual fact there are other ways for you

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to feel connected, and it might be a false sense of connectivity.

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So just asking, what do you feel like you're getting out of it? And then

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we want to explore shifting your perspective. And with

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this, I do like to start simple by thinking about how do

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other people see the— see this, especially people

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who have tackled it. If you are someone with the sugar example, you might

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know someone in your life who just goes to a celebration,

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a party, dinner, and they just don't seem to care about

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dessert. Now, we don't know someone who doesn't order

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dessert. They could actually be white-knuckling it. They could be using a ton of willpower.

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They could actually still be craving it. But I'm sure you've met people in your

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life who just genuinely don't believe they're missing out and they don't crave it.

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So what do they see differently than you? And also

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talking to people openly. I know people who have quit social media

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and I haven't fully quit social media, and I wonder Okay,

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what do they see and how do they think differently? And just

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get those perspectives. But finally, the most

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important thing is that if you really want to shift

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your mindset, the best way to do that is to back

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up challenging your current perspectives through

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real experience by testing it out and actually

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seeing what happens. Can I celebrate without

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cake? Can I comfort myself without snacks? Can I feel connected

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to people without seeing what they've posted recently?

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We're trying to actually get real lived experience. And

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for this, I know I've talked about this before, but I wanna use a, a

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restaurant analogy that I learned actually at a

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meditation retreat, but it has stayed with me for many, many years.

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And it's this idea of an understanding versus really knowing

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something. So let's imagine you are at a restaurant.

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You're looking at a menu and you see a meal that when you read

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the meal description, you think, yeah, that will probably taste

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good. You understand that these flavor combinations go together well. Maybe

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you have some past experience, but you've never had it at this restaurant.

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So you do have an understanding, but you can't be sure yet.

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Then maybe a server walks past and they've got that

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meal on the plate, bringing it to someone else's table. Now you've seen it and

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you've smelled it. And you have a bit of a deeper sense of,

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okay, I think I'm going to enjoy this meal.

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But ultimately you can't know for sure until you

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taste the meal. That's when you will really know if this is

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something that you like, because you're

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not just using logic to figure it out. You're actually experiencing it

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firsthand. And then you can say with certainty, yes, I enjoyed this and

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yes, I didn't. The same thing happens with beliefs where we can

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use logic and say, a celebration is a celebration,

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even if I don't have a piece of cake, or I can comfort my— myself

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other ways. But until you experience it for yourself, that's

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when you really believe it deep down. And that's when you start to really

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shift your brain because suddenly you're not

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just thinking about how things are different. You're actually experiencing how they're different

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and you are still okay. And then you start to separate

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yourself from this desire to have a thing because

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you no longer feel that desire. You don't— doesn't have that same control

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and you become released from it. And that is best done

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through experience, but you need to tackle both at the

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same time. So if you are trying to quit something that has this

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addictive nature that's impacting your brain's reward

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pathways and saying, keep doing this, this is good, I want this, I want

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the benefits of this. We want to tackle it

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biologically, get away from it, and that might, might be a little

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uncomfortable at first, and we might actually just need to use some, some straight up

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willpower in those early days. But we also have to tackle

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that second battle, which is addressing our mindset

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to break away from that psychological craving or

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that desire. Cuz as long as we still want it, we

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will feel like we're missing out and that pull will still be there.

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Even if we've tackled it biologically and we'll just find ourselves back there. So to

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have that lasting change, you need to tackle both. It's biology

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and psychology at the same time. So

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hopefully this has given you some perspective on maybe a habit that

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you are trying to break. How do you tackle both? Maybe you just start with

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one, but if you want it to last, you have to break free from

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that desire and that psychological craving. And that

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is when you can really find and keep your momentum.

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