What a Nutrition Coach Really Buys at Costco (And Why It’s Not All Kale and Chicken Breast)

As a nutrition coach, it's not uncommon that someone asks me:
“What kind of diet do you follow?”

People expect something strict, “clean”, maybe a little obsessive and think that my shopping cart is packed with kale, quinoa, and plain chicken breast.

The truth is that I don’t prescribe diets to my clients, and I don’t follow one either.

Instead, my approach to food is rooted in balance, variety, and real, whole foods, with one key principle always at the center: moderation.

Yes, I focus on high-quality nutrition. But you’ll also find bread and sweets in my shopping cart because everything can fit when you let go of perfectionism and focus on what really works long term.

But it took me years to get here.

My Dieting Past: From Obsession to Balance

In my early 20s, I—like many women—believed I had to start dieting. I began with Weight Watchers. It worked in the sense that I lost weight. But what I also gained was a deep-seated fear of fat.

I avoided oil like the plague. Butter was out. I lived on apples and raw carrots. So many carrots that, to this day, I still don't like raw carrots. Sure, I learned to love vegetables, but I was barely eating any protein or healthy fat. And because I had completely cut out sugar, I would eventually break down and binge on chocolate and candy. That happened at first once a month, then become a biweekly and then a weekly thing.

Then came Paleo. It actually was a step forward because I finally started eating more protein. In fact, it was helpful because I started eating more food in general which was very much needed. Especially once I got into strength training, I realized that those barbells won't come off the floor if I keep restricting my eating. But I followed the most strict version you could imagine: no grains, no dairy, no potatoes. I remember bingeing on coconut milk and nuts just because they were “allowed.”

Later, I tried intermittent fasting. I wasn’t counting the hours, but I’d regularly delay my first meal until late morning after teaching a bootcamp, doing my own HIIT session, and sometimes even going for a run before eating anything. My body was running on coffee and adrenalin.

Each phase came with something useful. I don't blame these diets because after all, it was me who chose to follow them in such an extreme way, no one forced me. But doing so also did something damaging. I always had a list of “bad” foods, and I was constantly trying to tighten the reins, hoping to finally find the perfect diet.

It didn’t work.

Today, my approach is the opposite of restrictive. I eat a wide variety of foods. I eat enough. I eat carbs, fat, and protein. I eat when I’m hungry. Stop when I'm full. And I feel better than ever.

So, What Does a Nutrition Coach Buy at Costco?

In my most recent Costco trip, I got a bunch of things that I put in the following categories:

Fruits & Vegetables
Protein
Breads & Sweets
Other fun things

If you’ve ever wondered how to shop in a way that’s both healthy and realistic, let’s dive in.

Part 1: Fueling Up with Fiber and Freshness

Let’s start with produce.

Fruits and vegetables are essential for digestion, blood sugar regulation, and overall vitality, thanks largely to their fiber content. I try to get a variety of colors, although I don't make a big deal if I don't have the “entire rainbow” on the place.

Here’s what went into my cart:

Grape tomatoes – Easy to toss into salads or eat on the go
Arugula – Though I usually get spring mix, this time I felt like getting arugula. It does not matter, really! Something leafy and something green is good enough
Broccoli – I steam it in the Instant Pot for zero minutes. That’s the secret to keeping it tender without turning it into mush
Sweet potatoes – I've always loved these
Cucumbers – Perfect in salads or just snacking
Bell peppers — Roast them for a slightly sweet, caramelized flavor, or make stuffed peppers with ground beef and rice
Grapes – My husband’s favorite
Frozen blueberries – I add these to my morning yogurt to start my day with fiber.

Part 2: The Protein Powerhouse

One of the biggest mistakes I see (and used to make myself when I was living off of apples, carrots, fat-free milk and pasta) is not eating enough protein. It’s essential for muscle maintenance, satiety, and hormonal health.

Here’s what filled the protein section of my haul (I've added links where I could find them):

Shrimp – Virtually pure protein, low in fat and carbs
Organic ground beef – Red meat isn’t something to fear; it’s full of nutrients and easy to pair with veggies and starches
Beef stew meat – Cooked in the Instant Pot for 50 minutes with broth, carrots, and onions = high-protein comfort food
Crispy chicken (Real Good Foods) – A convenient, high-protein option that we have every single week
Amylu Cranberry & jalapeño chicken meatballs – These were new to me; They are not as high in protein as beef or shrimp, but still have 14 grams per serving, and if you add a few eggs, you are almost at 30g of protein per that meal
Teton Grass-fed beef sausages – Mostly for my husband, he has these for breakfast. I think they're ok but I normally don't eat them
Columbus Turkey breastand Black Forest ham – Easy high-protein snacks. Pair a few slices with light cheese and you’ve got a solid mini meal. I also put these on sandwiches.
Eggs – A daily staple. I eat at least two per day, and no, I don’t fear their fat content
Oikos Triple Zero Yogurt – My go-to: 15g of protein per serving
Noosa yogurt — This is not a high protein yogurt, but this is what my husband prefers. It's also higher in sugar.

Part 3: Bread and Sweets: The Importance of Moderation

I’m not anti-carb, and I certainly don’t fear sugar.

I picked up:

Rustic Italian loaf and artisan rolls – All of it goes straight to the freezer, and I reheat slices as needed.
Caramel s’mores clusters – These are made with milk chocolate, which I genuinely prefer over dark
Butter waffle trio cookies – A new item I decided to try

I eat a little bit of sugar daily. Why? Because when I completely restrict it, it backfires. A little each day takes the “edge off” so to speak. I usually see that this approach tends to work better for people, compared to complete restriction.

The key? Moderation, not moral judgment over what’s “clean” or “dirty.”

Part 4: Other

A few other things made it into the cart that aren’t necessarily “main ingredients,” but are part of my routine and wellness:

Coconut water – I drink about half a bottle daily, usually mixed with my Tianchi herbal drink mix. I've been drinking this for years now. The coconut water is hydrating and rich in potassium, which is especially helpful if you're under stress
Organic strawberry spread – Not overly sweet and a nice addition to toast or yogurt
Sushi – Yes, Costco sushi! We tried a variety that’s higher in protein and paired it with a quick salad made from our veggie haul. I have to say… We didn't like it, and we won't get it anymore. But now we know 🙂

Don't Diet… Choose a Lifestyle You Can Sustain.

When people ask what kind of diet I follow, I tell them:
I don’t follow one. I live by guidelines, such as

Focus on real, whole foods
Eat protein with every meal
Enjoy carbs and fats without fear but be moderate with them
Practice portion control, don't obsess about every bite
Allow room for the foods you love
Don’t moralize your meals

That’s the “easiest diet” I’ve ever followed because it’s not a diet at all. It’s flexible, balanced, and built for real life.

Want to Feel Stronger Too?

Nutrition is just one part of the puzzle. If you want to get fitter, stronger, and feel better in your body, you also need to train your muscles regularly.

That’s why I created Fit From Scratch: a completely free workout plan that helps you build strength from the ground up. It’s available in two versions:

Bodyweight/Bands
Dumbbells

Download Fit From Scratch Training Plan + Workout Videos Now

Choose what works for you—and start feeling the difference in your energy, mindset, and results.

Final Thought

A well-stocked kitchen—and a healthy lifestyle—doesn’t require perfection. It requires principles you can live with and habits that support your life, not restrict it.

You don’t have to choose between chicken breast and chocolate. You can have both. I do. Every week.

And I’ve never felt better.

More resources:

FREE Calorie Setup Guide: https://kerstenkimura.com/the-calorie-setup-guide/ – figure out how many calories and protein you need to eat for fat loss

FREE Course Strong and Sensitive: https://kerstenkimura.com/14-day

FREE nervous system regulation guide for anxiety: https://kerstenkimura.com/3-somatic-exercises-free-guide/

Beginner Level Strength Training Program: https://courses.kerstenkimura.com/train-to-build-starter-program/

Intermediate Level Strength Training Program: https://courses.kerstenkimura.com/train-to-build-intermediate/

Fit and Fueled Vault: A collection of 75+ video trainings providing sustainable, holistic approach to strength, nourishment, and nervous system regulation for women. NO DIETS. https://courses.kerstenkimura.com/fit-and-fueled-vault-course/

Emotionally Fit is my emotional awareness program for chronic pain or other chronic symptom recovery. You can find it here: https://courses.kerstenkimura.com/emotionally-fit-program/

Visit my Etsy store: https://www.etsy.com/shop/dotsbykersten

Apply to work with me: https://forms.gle/6NNHGmhvBQERvmu67

Get in touch:

Website: kerstenkimura.com

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Kersten Kimura