I Asked ChatGPT What People Overbuy at Costco Without Realizing It — Here’s What It Said
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Bulk purchases at Costco typically do offer steep savings, but what are some areas that people overbuy in at Costco without realizing it?
We asked ChatGPT and it broke down several areas. Below are the top items people overbuy at Costco without realizing.
Also here’s how to get good deals at Costco without overspending.

Fresh Produce
- Example price: $7.48
First on the list was a reality check because a unit price for fresh produce might look unbeatable, but ChatGPT had a different perspective.
“Large quantities spoil fast unless you have a big household or cook daily,” ChatGPT said. For instance, this 2-pound pack of grape tomatoes.
Consider the possibility of you freezing, pickling or eating your Costco produce within a week.

Snacks
- Example price: $15.99
“Portions creep up when snacks are abundant,” ChatGPT said.
You risk overconsumption when you buy snacks in bulk from Costco and the calories and sugar add up fast. For example, these Goldfish crackers that are 130 calories per small pack. You or someone in your household, also run the risk of getting bored of a snack and leading to waste.

Bakery Items
- Example price: $44.99
Bakery items at Costco like muffins, croissants, bagels and cakes have a short shelf life and are often impulse buys. Like this cinnamon coffee cake by Collin Street Bakery that sells for $44.99 — sounds delicious, but could go bad very quickly. ChatGPT noted an exception. “[They’re] great if you’re hosting, feeding kids or freezing immediately,” the artificial intelligence (AI) chatbot said.

Condiments and Sauces
- Example price: $11.99
Opened condiments like mayonnaise, ketchup, mustard, dressings and oils do expire and flavor degrades long before an empty bottle. Costco sells a whopping 64-ounce jar of mayonnaise for $11.99. That much mayo could spoil before you even use half the jar.
ChatGPT offered an interesting hidden cost here. “You stop experimenting because you feel obligated to ‘use it up,'” the AI chatbot explained.

Supplements and Vitamins
- Example price: $34.99
Whether it’s for multivitamins, probiotics or protein powders, peoples’ needs and routines change. ChatGPT noted that powders clump and capsules expire and you abandon half-used bottles. A prime example is this sports-focused multivitamin that brings 150 capsules. Buying supplements and vitamins in bulk from Costco assumes longer-term consistency.
Editor’s note: Pricing and availability may vary depending on location.
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