Why Healthy Habits Don't Stick (And What to Do Instead)

If you've ever found yourself thinking, "I know what I should do, I just can't seem to do it," you're not alone.

As a functional dietitian, I've spent years helping people improve their nutrition, manage chronic disease, increase their energy, and build healthier habits. And one thing has become crystal clear: knowing what is "right" or "wrong" is rarely enough to create lasting behavior change.

Most people already know what should do. They know they should exercise more, eat more vegetables, drink more water, get better sleep, and spend less time scrolling on their phones.

The problem isn't a lack of information. The problem is that "should" is a terrible long-term motivator.

In fact, guilt, shame, and obligation are some of the biggest reasons healthy habits fail.

Why "Should" Doesn't Create Lasting Behavior Change

One of the biggest reasons healthy habits fail is that people rely on guilt, shame, and obligation to motivate themselves. While these approaches can create short-term behavior change, they rarely create lasting healthy habits. That's because nobody wants to spend their entire life feeling like they're being scolded.

Sure, obligation might work on those days where motivation is sky high. You know, the Monday after New Year's or the week after you go bathing suit shopping and the fluorescent dressing room lights make your thighs look like bags of cottage cheese.

But after scolding yourself like a Catholic school nun for long enough, the pain starts to wear off. The beratement simply becomes white noise.

This is one of the first things I teach my clients. Yes, we talk about how to structure your plates for balanced eating. Yes, we discuss nutrition principles. But what keeps people consistent isn't a list of food rules.

It's understanding how their choices actually make them feel.

Will this meal give me energy?
Will this food leave me feeling bloated?
Will this treat bring me joy?
Will this choice support the life I want to live?

Because let's be honest. Has there ever been a day in human history when pizza didn't look delicious? Of course not. So what gets clients choosing the nutritious options the majority of the time isn’t asking what looks good or constantly asking what they should do. It's learning how to make choices that align with how they want to feel.

How Food Rules Can Sabotage Healthy Eating

Many people assume successful healthy eating requires more discipline and stricter food rules. In reality, excessive food rules often create stress, guilt, and an unhealthy relationship with food, making healthy eating harder to maintain long term. I know because I spent years living it.

After spending over a year on the Autoimmune Protocol (AIP) diet and another year navigating a maze of food rules, I hit a breaking point. I could barely eat a meal without performing mental gymnastics that would've made Simone Biles cry.

Was it inflammatory?
Was it technically allowed?
Was it balanced enough?
Had I earned it?

Half the time, I felt like crap. And during the other half, eating had become so miserable that I barely wanted to do it.

Yes, I had put my autoimmune disease into remission, but at what cost? If this was the life I had fought so hard for, what kind of life was it?

So in an act of defiance (my Hebrew name literally translates to "rebel," so this was always going to happen eventually), I dropped the rules. I stopped obsessing over what I should eat and started paying attention to what made me feel good.

I knew what the science said about what I supposedly "should" be eating which helped shape my choices, and then I simply tuned in to what I thought would feel good. Sometimes that was way more carbs than I expected. Sometimes that was meals I would previously call imbalanced. But ironically, without these rules, I started to truly come alive.

And that's where this article should end.

Except it doesn't.

Because while I had stopped saying "should" to food, I hadn't stopped saying it everywhere else.

The Real Reason Healthy Habits Don't Stick

Many people believe healthy habits fail because they lack discipline or willpower. In reality, behavior change research suggests that long-term consistency depends on much more than self-control alone. Factors like motivation, habit formation, environment, and personal values often play a much bigger role than people realize. I learned this lesson in a surprising place: while building my dream business.

As you may know, I started my own functional nutrition practice this year. Helping people uncover the root causes of chronic symptoms, gut issues, fatigue, and autoimmune disease is my dream. It's what I've wanted to do for years.

And for a while, it was exciting.

Until the shoulds showed up.

I should learn SEO.
I should post more content.
I should improve my website.
I should create more reels.
I should optimize my LinkedIn.
I should study social media marketing.

And before long, my dream became a giant to-do list.

Somewhere between analyzing website copy for the fifteenth time and watching yet another Instagram reel about how to make Instagram reels, I found myself thinking:

"Why the hell am I even doing this?"

And that scared me.

Because this wasn't some random task I was trying to force myself to complete. This was my dream. The thing I had gone to grad school for four whole years for. The thing that gave meaning to my decade of chronic illness. The thing that made me excited to open my laptop, even on a Saturday morning.

Yet somehow, buried underneath a mountain of “shoulds,” I couldn't even remember why I wanted it.

That's when I realized I had made the same mistake with my business that so many people make with their health: I had turned something I genuinely wanted into an obligation.

And once my dream became a giant pile of “should’s,” I started wanting to run from it.

Now apply that to your health.

Building a healthier diet is not exactly most people's lifelong dream. Nobody wakes up as a kid fantasizing about eating more vegetables or having a beautiful cabinet of supplements. So if a constant stream of should's was enough to make me want to abandon my dream, what do you think it's doing to your motivation around something that already feels like a chore? If you spend your days obsessing over what you should be eating, how you should be exercising, and all the things you're doing wrong, why on God's green earth would you want to stick with it?

What to Do Instead of Saying "Should"

If guilt and obligation don't create lasting behavior change, what does? The most sustainable healthy habits are typically driven by intrinsic motivation, the desire to feel better, have more energy, reduce symptoms, or build a life you genuinely enjoy. That's where replacing "should" with "want" can be surprisingly powerful.

Instead of asking:

"What should I do?" Ask: "What do I want?"

Not because life is always fun. But because purpose is a far more sustainable motivator than guilt. The solution isn’t to stop doing hard things. Trust me, I still do plenty of things I'd rather not do. The shift was learning to stop asking myself what I should do and start asking what I actually wanted. Not what I wanted in the next five minutes. What I wanted on the other side of the action.

Because do I love doing squats? No, they make me feel like my body will snap in half at any moment. But do I love having the strength to hike for hours on end? You bet.

And do, I look at a salad with the longing of a lost lover? No, I view my salad more like a solid acquaintance. But I absolutely love the energy it gives me.

And do, I enjoy spending hours trying to figure out how Google, ChatGPT, and the rest of the internet decide whose content deserves attention? Not even a little bit. But I do love the idea of someone who's scared, exhausted, and convinced they're out of options stumbling across my work and finally feeling hopeful again.

That's what I was missing.

The task itself isn't always exciting. The outcome is.

So the next time you feel “should’s” threaten to ruin your health journey, try these reframes:

"I should go to the gym." → "I want to feel strong."

"I should eat healthier." → "I want more energy."

"I should stop scrolling and go to bed." → "I want to wake up rested."

"I should finish this project." → "I want the freedom, opportunity, or impact that comes from completing it."

The goal isn't to eliminate responsibility. The goal isn’t even to remove unpleasant activities. The goal is to reconnect your actions to your values.

Because healthy habits become much easier to maintain when they feel meaningful.

And if you’re looking for a dietitian who will never tell you that you should skip the pizza (okay, I might accidentally slip into the word, but I promise we’ll focus on how it makes you feel, not what’s “right” or “wrong”), click here to learn about more ways that we can work together.

Because healing should be fun 😈.

Frequently Asked Questions

Why do healthy habits feel so hard to maintain?

Healthy habits feel hard to maintain when they're built on "should" rather than genuine desire. When motivation comes from avoiding guilt rather than moving toward a feeling you actually want, it burns out fast. The habits that stick long term are the ones tied to how you want to feel, not a set of rules you're trying not to break.

Is it normal to lose motivation to eat healthy?

Yes, losing motivation to eat healthy is extremely common and usually signals that your approach is obligation-based rather than value-based. If every food choice feels like a test you're either passing or failing, burnout is inevitable. Shifting from "I should eat this" to "this is how I want to feel" changes the entire dynamic.

Why do I feel guilty every time I eat something "bad"?

Food guilt almost always comes from years of attaching moral weight to food choices. When you've internalized the idea that eating certain foods makes you a "bad" person, guilt becomes automatic. The goal isn't to stop caring about what you eat, it's to make choices from a place of self-knowledge rather than self-punishment.

Why do I keep falling off my diet?

The start-and-quit cycle usually means the habit was built on a burst of motivation rather than a clear connection to your why. Instead of starting with rules, start with a feeling: what does being healthier actually give you? Energy? Fewer symptoms? Clarity? When the habit is anchored to something real, it becomes far harder to abandon.

Does feeling guilty about food actually help you eat healthier?

No. Research consistently shows that shame and guilt are not effective long-term motivators for behavior change. While guilt might create a short-term push, it tends to wear off quickly and often triggers the exact behaviors you're trying to avoid. Sustainable change comes from connecting food choices to how you want to feel, not from punishing yourself for getting it wrong.