Discover the top high-protein, high-fiber Costco bulk foods recommended by a dietitian for weight loss.
Costco is a popular shopping destination for many, including nutrition professionals like dietitians. While the warehouse offers a wide range of high-calorie items, such as tempting bakery goods, there are also plenty of healthy choices available. Tara Collingwood, MS, RDN, CSSD, LD/N, ACSM-CPT, a Board Certified Sports Dietitian and co-author of the Flat Belly Cookbook for Dummies, is one such Costco member who recently shared her list of essential bulk foods with us. According to Collingwood, “This list is great because it focuses on nutrient-dense, minimally processed foods, which are key for supporting weight loss. It’s important to remember that no single food can cause weight loss. These foods are beneficial because they help with satiety, blood sugar control, and overall diet quality. Even healthy options like nuts, almond flour, and seeds are calorie-dense, so portion control is still important. Ultimately, weight loss is about maintaining a balance of calories, not just choosing ‘healthy’ foods.” She emphasizes the importance of including foods high in protein, fiber, and healthy fats in your diet as they can help you feel full for longer and prevent overeating. Purchasing these items in bulk can also make it easier to maintain healthy eating habits. Here are 9 Costco bulk foods that dietitians swear by for weight loss.
Kirkland Organic Greek Yogurt

Kirkland Organic Greek Yogurt is highly recommended by health and fitness experts for its high protein content, which aids in satiety and muscle preservation during weight loss. Collingwood notes, “While it’s not ‘zero sugar’ due to natural lactose, it doesn’t have any added sugar.” Additionally, it is known for its creamy and delicious taste.
Kirkland Shelled Hemp Hearts

Kirkland Shelled Hemp Hearts are another favorite of Collingwood’s, as they provide healthy fats, some protein, and essential minerals. These fats contribute to satiety, but it’s crucial to be mindful of portion sizes due to their calorie density.
Wild Caught Sockeye Salmon

