Healthy Costco Foods for the Level 6 Diet

Costco can be one of the best places to shop when you're trying to lose weight and follow the Level 6 Diet. While there are certainly plenty of tempting processed foods throughout the warehouse, Costco also offers an impressive selection of high-quality proteins, vegetables, healthy fats, and convenient meal-prep options that can support your weight loss goals.

The key is knowing what to put in your cart.

For patients following the Level 6 Diet, the goal is to focus on protein, non-starchy vegetables, healthy fats, hydration, and minimally processed foods while limiting refined carbohydrates, added sugars, and highly processed snacks.

Here are some of the best Costco foods to support your weight loss journey.

Rotisserie Chicken

Costco's rotisserie chicken is one of the most convenient protein sources available.

Why It Works

• High in protein
• Affordable
• Ready to eat
• Great for meal prep

Ways to Use It

• Chicken salads
• Lettuce wraps
• Protein bowls
• Vegetable stir-fries

Removing the skin can help reduce excess calories and added fats.

Wild-Caught Salmon

Salmon provides high-quality protein along with beneficial omega-3 fats.

Why It Works

• Supports fullness
• Rich in healthy fats
• Helps preserve muscle during weight loss

Meal Ideas

• Baked salmon with broccoli
• Salmon salads
• Cauliflower rice bowls

Frozen Vegetables

One of the most underrated sections of Costco is the frozen vegetable aisle.

Great options include:

• Broccoli florets
• Cauliflower rice
• Green beans
• Mixed vegetables
• Stir-fry blends

Frozen vegetables are convenient, affordable, and often just as nutritious as fresh vegetables.

Avocados

Avocados provide healthy fats and fiber that may help improve satiety.

Benefits

• Supports fullness
• Contains fiber
• Easy addition to meals

Use them in:

• Salads
• Protein bowls
• Lettuce wraps
• Smoothies

Organic Mixed Greens

Large containers of mixed greens make it easier to increase vegetable intake throughout the week.

Easy Uses

• Side salads
• Lunch salads
• Protein bowls
• Smoothie additions

The more vegetables available at home, the easier healthy choices become.

Kirkland Almonds and Mixed Nuts

Nuts can be a satisfying snack when consumed in moderation.

Benefits

• Healthy fats
• Fiber
• Convenient grab-and-go option

Portion control remains important since calories can add up quickly.

Chia Seeds and Ground Flaxseed

Both are excellent sources of fiber and healthy fats.

Why They Work

• Support digestion
• Increase fullness
• Easy to add to meals

Try adding them to:

• Protein shakes
• Smoothies
• Unsweetened yogurt alternatives
• Salads

Frozen Shrimp

Frozen shrimp provides a quick, lean protein option for busy families.

Benefits

• High protein
• Low calorie
• Quick preparation time

Great for:

• Stir-fries
• Salads
• Vegetable bowls

Sparkling Water

Many people struggle with hydration because they become bored with plain water.

Sparkling water can be a useful alternative to:

• Soda
• Sweet tea
• Sports drinks
• Juice

Look for options without added sugar.

Foods to Limit at Costco

While Costco offers many healthy choices, some popular items may not align with the Level 6 Diet.

Examples include:

• Muffins
• Cookies
• Pastries
• Sweetened yogurt
• Granola bars
• Crackers
• Chips
• Sugary cereals
• Sweetened coffee beverages

These foods can contribute to cravings, hunger fluctuations, and excess calorie intake.

Sample Costco Shopping Cart for Weight Loss

• Rotisserie chicken
• Salmon
• Frozen shrimp
• Organic mixed greens
• Broccoli
• Cauliflower rice
• Avocados
• Chia seeds
• Flaxseed
• Almonds
• Sparkling water

This simple shopping list can provide the foundation for a week of healthy meals.

Ready to Finally Feel in Control Around Food?

At Envizion Medical, we help patients take control of cravings, metabolism, and long-term weight loss through physician-supervised programs tailored to their individual needs.

Our programs may include:

• Personalized nutrition guidance
• GLP-1 therapies like semaglutide and tirzepatide
• Peptide support protocols
• B12 and Lipo Mino injections
• Ongoing accountability and coaching

Author

Molly Schulz Meet Molly Schulz, MS, Nutritionist, a passionate voice in the world of weight loss, nutrition, and fitness. With a Master’s degree in Nutrition, Molly combines science-backed knowledge with real-world strategies to help people achieve sustainable, healthy results—without extremes or confusion. Molly believes that true transformation happens when nutrition, movement, and mindset align. Her writing focuses on simplifying complex health topics, breaking down weight loss plateaus, supporting metabolic health, and helping readers build habits that actually last. Whether she’s discussing GLP-1 support, gut health, or high-protein meal strategies, her approach is always practical, realistic, and results-driven. When she’s not writing or coaching, you’ll find Molly in the gym—where she genuinely thrives. Strength training isn’t just part of her routine; it’s part of her identity. She’s a firm believer that fitness should feel empowering, not punishing, and she brings that same energy into