9 Costco Bulk Foods Dietitians Swear By for Weight Loss

Everyone I know shops at Costco, even nutritionists and dieticians. While the warehouse sells a lot of high-calorie items, including almost everything from the famous bakery, there are plenty of healthy options too. My go-to nutrition expert, 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 of the millions of Costco members who shop at the store. She recently shared her bulk shopping list with me. “I like this list overall because it focuses on nutrient-dense, minimally processed foods, which are exactly what we look for when supporting weight loss. But it’s important to remember: no single food causes weight loss. These foods work because they help with satiety, blood sugar control, and overall diet quality. Even healthy foods like nuts, almond flour, and seeds are calorie-dense, so portion size still matters. Weight loss ultimately comes down to overall calorie balance, not just choosing ‘healthy’ foods,” she says....