Scientists found that the chemicals in urine change depending on what you eat for a short time. If you eat a traditional Korean diet, your urine shows more of certain healthy compounds from soy and fats, but if you eat a typical Western diet, you see more different chemicals from proteins and steroids.

This study found that when obese people eat a Korean-style diet for a month, their urine looks very different from when they eat typical Western food—suggesting the body processes these diets in unique ways. The Korean diet left behind more plant-based chemicals, while Western diets left behind more stress-related chemicals.