It’s nutritious. Nutritious foods help make people healthy. I should hope that anything I eat was healthy – don’t want to eat lettuce with some kind of disease growing on it, or chicken with tumors.
The purpose of food is to provide our bodies with the nutrients they need to rebuild cells and operate organs at peak efficiency. We need micronutrients like vitamins and minerals for zillions of necessary functions in the body. We need protein to rebuild cells, and carbs for energy.
Foods can be beneficial, harmful, or neutral in the body. There is such a thing as too much kale, and not enough saturated fat, or vice-versa. Eating a wide variety of real, genuine, un-tampered-with foods is a path to good health.