The high-fat, low-carb keto diet comes with a laundry list of unapproved foods — say goodbye to carbs and sugar — but Costco is here to save the day yet again. Our favorite wholesale store makes going keto a breeze, thanks to its endless inventory of keto-friendly items. Costco even sells spaghetti squash in bulk, in case you needed one more reason to make a trip. See 30 of our favorite keto-friendly Costco finds, from frozen avocado chunks to grain-free granola.