There's a grocery store called “Premium†in the basement of the Seomyeon Lotte. If you’re looking for something from Canada or the States try here. I found Seventh Generation products [environmentally friendly laundry soap and cleaning products], goat’s milk and goat’s milk yogurt, cereal from back home, organic produce and foods, good [non-Skippy or Jiff] peanut butter etc. They also sell Quakers Oatmeal [18,000 for 2 kg] but you can get it for 1/2 the price at Seomyeon market [10,000 for 2 kg] or the market beside Gukje market [9,500 for 2 kg]. Check it out.