The Best of Costco: What to Buy and What to Avoid

3. Buy: olive oil

If you’re a fan of olive oil and enjoy using it in your salads or with your cooking, you definitely should not miss out on the Kirkland olive oil found at Costco. Not only is it a great deal, but the quality isn’t bad for its price. If you haven't switched to using olive oil in your cooking, consider doing so. Olive oil is rich in healthy, mono-saturated fats and contains a large amount of antioxidants. It has strong anti-inflammatory properties and can prevent cardiac disease and strokes.