Costco isn’t just about bulk toilet paper and snack-sized convenience foods. If you know where to look, it can actually be one of the best places to stock up on high-quality, toxin-free staples without breaking the bank. While it’s easy to get overwhelmed by the sheer number of choices, not everything at Costco is a win for health-conscious shoppers. Some options are great, while others are loaded with preservatives, pesticides, and unnecessary fillers.

That’s why I have a short list of non-negotiables—three staples I always grab when I do a Costco run. These items are clean, nutritious, and way more cost-effective than buying the same thing at other grocery stores. If you’re looking to eat well without overspending, add these to your cart next time you’re cruising the aisles.

New Zealand Lamb: The Healthiest Meat at Costco

Finding high-quality meat at a big-box store can be hit or miss. While Costco does have organic and grass-fed options, their New Zealand lamb stands out as one of the best choices you can make. Here’s why:

• New Zealand has some of the strictest agricultural regulations in the world. Their lamb is raised with minimal antibiotic use and without genetically modified feed or toxic pesticides. This means you’re getting a product that’s naturally clean, without the chemical cocktail that’s common in conventional meat.^[1]
• These lambs are 100% grass-fed and pasture-raised. Unlike grain-fed animals, pasture-raised lamb contains higher levels of omega-3 fatty acids and conjugated linoleic acid (CLA), which are beneficial for heart health, metabolism, and reducing inflammation.^[2]
• Multiple cuts available. Costco offers racks, ground lamb, and shanks, so whether you’re grilling, slow-cooking, or making meatballs, there’s a cut for every meal.

Lamb is also one of the most nutrient-dense meats available, packed with bioavailable iron, zinc, and B vitamins. If you’re aiming to eat clean, nutrient-rich protein, this is one of the best Costco finds you can bring home.

Organic Baby Bella Mushrooms: A Gut-Friendly Superfood at a Steal

Mushrooms might not be the first thing on your mind when you think of Costco, but their organic Baby Bella mushrooms are a must-buy for several reasons.

• They’re loaded with prebiotic fiber. Your gut microbiome thrives on fiber, and mushrooms provide a unique type called beta-glucan that helps support beneficial bacteria. A healthier gut means better digestion, immune function, and even mental clarity.^[3]
• They contain essential bioavailable minerals. Mushrooms are naturally high in selenium, copper, and potassium, nutrients that support immune function, nerve health, and electrolyte balance.^[4]
• They’re significantly cheaper at Costco. Compared to Whole Foods, where organic mushrooms can cost up to three times as much, Costco’s price is hard to beat. You can grab a large pack and use them in everything from omelets to stir-fries to slow-cooked meats.

Mushrooms are also one of the few foods that naturally produce vitamin D when exposed to sunlight. If you leave your Baby Bellas in a sunny spot for an hour before cooking, you’ll boost their vitamin D content—an easy, natural way to increase your intake of this essential nutrient.

Apple Cider Vinegar with the Mother: A Gut and Detox Staple

Apple cider vinegar (ACV) has been a health staple for centuries, and it’s no surprise that it remains a favorite among biohackers and health-conscious shoppers. Costco’s version is not only high-quality, but it’s also a fraction of the price you’d pay at other stores.

• Supports digestion and gut health. The raw, unfiltered ACV at Costco contains “the mother,” a mix of beneficial bacteria, enzymes, and acetic acid that supports digestion and balances gut bacteria. It can help with bloating, acid reflux, and overall digestive function.
• A natural detoxifier. ACV supports liver function and helps the body remove toxins more efficiently. It also aids in balancing blood sugar levels, which can be beneficial for energy, metabolism, and cravings.^[5]
• A massive price difference. At Whole Foods, a bottle of high-quality ACV can cost nearly double what you’ll pay at Costco. Since ACV has a long shelf life, it makes sense to buy it in bulk and use it daily in salad dressings, marinades, or diluted in water as a morning tonic.

Smart Shopping Without Compromise

Shopping at Costco doesn’t mean you have to sacrifice quality for quantity. By choosing wisely, you can stock up on nutrient-dense, clean foods while keeping your grocery bill reasonable. New Zealand lamb, organic mushrooms, and apple cider vinegar are just three of the best finds, but there are plenty of other hidden gems if you know what to look for.

If you have Costco non-negotiables of your own, drop them in the comments. I’m always on the lookout for more high-quality finds that don’t come with a side of unnecessary toxins. Happy shopping.

References:

1. Pattis, Isabelle, et al. “Antimicrobial Resistance in New Zealand—A One Health Perspective.” Antibiotics, vol. 11, no. 6, June 2022, p. 778.
2. Daley, Cynthia A., et al. “A Review of Fatty Acid Profiles and Antioxidant Content in Grass-Fed and Grain-Fed Beef.” Nutrition Journal, vol. 9, Mar. 2010, p. 10.
3. Yu, Changxia, et al. “The Effect of Mushroom Dietary Fiber on the Gut Microbiota and Related Health Benefits: A Review.” Journal of Fungi, vol. 9, no. 10, Oct. 2023, p. 1028.
4. Assemie, Anmut, and Galana Abaya. “The Effect of Edible Mushroom on Health and Their Biochemistry.” International Journal of Microbiology, vol. 2022, Mar. 2022, p. 8744788.
5. Ousaaid, Driss, et al. “Beneficial Effects of Apple Vinegar on Hyperglycemia and Hyperlipidemia in Hypercaloric-Fed Rats.” Journal of Diabetes Research, vol. 2020, July 2020, p. 9284987