Costco can be a goldmine for budget-friendly groceries, but it’s easy to assume the healthiest foods are always the priciest. The truth? There are plenty of under-$10 staples that dietitians actually recommend.
These foods make eating well more realistic—and they’re items you’ll actually use before they expire.
Kirkland Signature frozen mixed vegetables
Frozen vegetables get a bad reputation for being “less fresh,” but dietitians point out they’re often more nutrient-dense because they’re flash-frozen at peak ripeness. Costco’s massive frozen veggie blend is under $10 and makes meal prep easier. Toss them in soups, stir-fries, or casseroles, and you’ve got an easy way to add vitamins and fiber to your weeknight meals without worrying about spoilage.
Organic brown rice
A 6-pound bag of organic brown rice from Costco costs less than $10 and provides slow-burning energy that keeps you full longer. Dietitians like it because it’s a whole grain packed with fiber, magnesium, and B vitamins. Plus, it pairs with nearly anything—from chicken and veggies to scrambled eggs or leftover stir-fry.
Kirkland Signature canned tuna in water
Tuna is one of the most affordable protein sources you can buy, and Costco’s Kirkland Signature cans are dietitian-approved. Each serving is high in lean protein and omega-3 fatty acids, both essential for heart health. Keep a few cans on hand for quick lunches—like tuna salad on whole-grain crackers or mixed into pasta with vegetables.
Greek yogurt
Dietitians love Greek yogurt because it’s high in protein and calcium and supports gut health. Costco sells large tubs of plain Greek yogurt for under $10, which you can flavor yourself with honey, berries, or cinnamon. Skip the sugary pre-flavored cups and go for this version instead—it’s more versatile and keeps your breakfast or snacks balanced.
Rolled oats
A bag of Quaker or Bob’s Red Mill rolled oats from Costco costs less than $10 and goes a long way. Oats are an excellent source of fiber, help regulate blood sugar, and can support heart health. Dietitians recommend them because they’re satisfying, cheap, and adaptable—you can make overnight oats, pancakes, or even use them as a binder in meatballs.
Kirkland Signature organic eggs
Eggs are one of the best nutritional deals at Costco. Under $10 for two dozen organic eggs means you’re getting protein, healthy fats, and essential vitamins at a fraction of the price elsewhere. Dietitians recommend eggs because they’re nutrient-dense and keep you full for hours—whether you’re making breakfast or throwing one on a salad for extra protein.
Natural peanut butter
Costco’s two-pack of natural peanut butter runs under $10 and is packed with protein and healthy fats. Dietitians say the key is choosing versions with only peanuts and salt—no added oils or sugars. A spoonful on toast, in oatmeal, or paired with apple slices makes an easy, balanced snack that won’t break your grocery budget.
Kirkland Signature frozen fruit
Frozen fruit makes it easier to eat healthy without wasting produce. The big bags of frozen berries, pineapple, or mango cost under $10 and last for months. Dietitians love them for smoothies, yogurt bowls, or even healthy desserts. Since they’re frozen right after harvest, they keep their nutrients and flavor—without the risk of turning mushy in the fridge.
Costco may be known for bulk buying, but these affordable finds prove that eating healthy doesn’t have to mean spending more. A few smart choices in your cart can stretch your dollar and actually support your long-term health at the same time.
*This article was developed with AI-powered tools and has been carefully reviewed by our editors.
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