I'm a nutritionist, and I enjoy shopping at Costco even though I've only got a two-person household.The wholesale retailer is a great place to buy certain items in bulk, and I love going there to stock up on frozen fruit, eggs, and my favorite pantry staples, from Kirkland Signature olive oil to its unsweetened nuts.That said, there are a few popular buys you won't find in my Costco shopping cart.

I skip the whites and buy cartons of whole eggs instead.

I'd rather have whole eggs.

Candace Nelson

Some people may prefer eating only egg whites — they contain fewer calories and less cholesterol than the yolks — but I'd rather use whole eggs and also get the benefits of the yolk.Whole eggs are an excellent source of protein, amino acids, iron, and vitamins A, B6, B12, and D. Luckily, Costco also sells cartons of eggs in bulk for a reasonable price.