Must be in the air? Seriously, maybe abundant low-quality sources? AI sez:

The diet in North Korea is characterized by a heavy focus on grains, but has changed over time to include more animal protein:

Grains, Rice, wheat, and maize are the main sources of calories in the North Korean diet. In 1961, over 70% of calories came from grains, and that number dropped to 61% five decades later.

Animal protein Before 2000, North Korea's diet was mostly vegetarian, with meat eaten only a few times a year. However, since 2005, the availability of animal protein has increased, with an emphasis on poultry, pigs, rabbits, sheep, goats, and cattle.

Other foods Popular foods in North Korea include kimchi, red pepper paste, soybean paste, soup, and rice dishes. A traditional meal might include side dishes, a main course like noodles, porridge, or grilled meat, and rice dishes.

Regional differences People in rural areas and mountain valleys eat more vegetables and herbs, while people in coastal areas have access to seafood.

Healthy options The upper class in North Korea favor healthy, balanced diets, including chicken wraps and tofu rice.

Sorry - this was entirely due to me also talking politics with some friends earlier in the day. Switched up SK and NK when I typed this.

Obesity in adult men in South Korea more than doubled between 09 and 19.