As if you needed another excuse to make a Costco run.
- Costco makes it easy to buy frozen food in bulk without breaking the bank.
- The Kirkland Signature Three Berry Blend is the No. 1 anti-inflammatory frozen food at Costco.
- Frozen berries provide antioxidants and are a budget-friendly way to support your diet.
Stocking your freezer with the right foods is one of the easiest ways to support your health, and Costco makes it easy to buy in bulk without breaking the bank. While inflammation is influenced by many factors, including stress, smoking and physical activity, your diet can play a role as well. When it comes to food choices, the frozen foods aisle at Costco is full of anti-inflammatory options that can help. Frozen produce holds onto its nutrients well, lasts for months and makes it easy to add a nutrition boost to almost any meal.
Our top pick? The Kirkland Signature Three Berry Blend. This mix of raspberries, blackberries and blueberries packs a serious anti-inflammatory punch while also being affordable, versatile and always in season in your freezer. If you’re looking for one grab-and-go item that pulls its weight, this is it.
Why Costco’s Kirkland Signature Three Berry Blend Tops the List
Chronic, low-grade inflammation is linked to a higher risk of conditions like type 2 diabetes, heart disease and certain cancers. Diet is one lever you can pull to help keep it in check, and berries are among the most studied foods for the job. Here’s why this particular blend earns the No. 1 spot.
It Contains Anthocyanins & Other Polyphenols
Berries get their deep red, purple and blue colors from anthocyanins, a group of plant compounds with antioxidant properties. “They have been linked to lower levels of inflammation,” says Raksha Shah, M.A., RDN.
Research suggests these compounds may help support a healthy inflammatory response by influencing inflammatory signaling pathways in the body. While many human studies have found improvements in markers of inflammation, the findings have been mixed, and more research is needed to better understand their long-term effects.
It Preserves Peak-Season Nutrition
There’s a common myth that frozen fruit is less nutritious than fresh. In many cases, the opposite can be true. “Frozen berries are picked at the peak of season and flash-frozen, which helps them to retain their peak vitamins and antioxidants,” says Sarah Kiel, RD, CSSD. Fresh berries at the store may have traveled for days and started losing nutrients along the way, while frozen berries capture much of that peak-season nutrition and hold onto it until you’re ready to use them.
It Provides Fiber
Berries are a naturally good source of fiber, which feeds the beneficial bacteria in your gut. That matters because emerging research connects gut health to the body’s inflammatory balance. A blend of raspberries, blackberries and blueberries gives you a mix of fiber types, and just 1 cup provides 5 grams of fiber, contributing a meaningful amount toward your daily goal of roughly 25 to 34 grams. That fiber, paired with the berries’ water content, also helps you feel full.
It Delivers Powerful Antioxidants
Antioxidants work by neutralizing free radicals, unstable molecules that can damage your cells over time. Raspberries stand out here. “Raspberries are high in anthocyanins, which help to reduce inflammation in the body and reduce cellular damage,” says Emily Gozy, M.S., RDN, CDN. Research suggests the antioxidants in berries help protect cells from oxidative stress, adding to the many reasons berries are associated with better long-term health.
It’s Budget-Friendly & Convenient
Fresh berries can be pricey, and they spoil fast. Buying frozen in a large Costco bag stretches your dollar further and cuts down on waste. “Kirkland Signature Three Berry Blend has a mixture of raspberries, blackberries and blueberries that provides vitamin C, fiber and powerful antioxidants called anthocyanins,” shares Mascha Davis, M.P.H., RDN. Beyond the nutrition, the practical perk is real: You get a shelf-stable-in-the-freezer staple that’s ready whenever you need it; no rushing to use it before it turns.
It’s Endlessly Versatile
One reason this blend beats out single-fruit options is how easily it fits into your routine. “This blend helps to reduce inflammation in the gut and fight free radicals,” says Davis. Whether you toss a handful into breakfast or blend it into a smoothie, you get three berries’ worth of nutrients in one scoop, with no prep and no peeling.
Ways to Enjoy the Kirkland Signature Three Berry Blend
The best part about frozen berries is how little effort they take. “It can be easily added into smoothies, yogurt, oatmeal, acai bowls, etc., and doesn’t spoil quickly like fresh berries,” says Davis. You can use them straight from the freezer or thaw them for a softer texture. Here are a few easy ways to enjoy them:
- Blend them into smoothies. Blend a smoothie with plain Greek yogurt, spinach and a splash of milk for a fiber- and protein-rich start to your day.
- Stir them into oatmeal or overnight oats. Stir them into oatmeal while it’s warm so they melt into a natural, jammy sweetness.
- Top yogurt bowls. Spoon them over plain yogurt and top with nuts or seeds for extra crunch and healthy fats.
- Build a frozen berry bowl. Use them as a thick, colorful base and layer on granola and sliced fruit.
- Bake with them. Fold them into muffins, pancakes or whole-grain waffles.
- Make a simple berry sauce. Simmer the berries with a little water until saucy, then drizzle over oatmeal, cottage cheese or whole-grain toast.
- Enjoy them frozen. Eat them straight from the bag for a refreshing treat on a hot day.
Other Anti-Inflammatory Options at Costco
The berry blend is a standout, but it’s far from your only choice. Here are a few other freezer picks worth adding to your cart:
- Frozen wild salmon. Salmon is rich in omega-3 fatty acids, which are well studied for their role in helping to lower inflammation and support heart health.
- Frozen edamame. These young soybeans deliver plant-based protein, fiber and antioxidant compounds called isoflavones.
- Frozen spinach. A source of vitamins, minerals and antioxidants, and easy to stir into soups, eggs and pasta.
- Frozen broccoli. A cruciferous vegetable that supplies fiber, vitamin C and beneficial plant compounds.
- Frozen cherries. Frozen cherries are another fruit-forward option that makes for an icy-sweet snack with no added sugars. “They’re picked at peak ripeness and flash-frozen within hours, which locks in nutrients like vitamin C and anthocyanins,” shares Caroline Thomason Bunn, RD CDCES.
Rotating a few of these into your meals gives you variety, which is one of the smartest ways to eat for long-term health.
Our Expert Take
If you’re looking for one simple, affordable way to eat for inflammation, the Kirkland Signature Three Berry Blend is a smart place to start. Its mix of raspberries, blackberries and blueberries delivers anthocyanins, fiber and vitamin C, and freezing helps lock in the nutrients picked at peak ripeness. No single food can do the heavy lifting on its own. Berries work best as part of a varied, mostly whole-food diet that also includes items like salmon, edamame and leafy greens. Keep a bag or two in your freezer, add a scoop to your favorite meals, and you’ll have an easy, evidence-backed habit working quietly in your favor.