Which food has the highest nutrient density among the following options?

Nutrient density refers to the amount of essential nutrients a food provides relative to its calorie content. Spinach stands out as having the highest nutrient density among the options provided. This leafy green is rich in vitamins and minerals, such as vitamin A, vitamin K, folate, and iron, while being very low in calories. This makes it an exceptional choice for individuals seeking to maximize nutrient intake without consuming excessive calories.

In contrast, while lean beef is a good source of protein and certain vitamins and minerals like iron and B12, it contains more calories which may lessen its nutrient density compared to spinach. Low-fat milk also provides essential nutrients like calcium and vitamin D but has a higher calorie count than spinach. Soda, on the other hand, is predominantly made up of sugars and provides minimal nutritional benefit, making it the least nutrient-dense option. Therefore, spinach is the clear leader in providing a high amount of nutrients per calorie consumed.