Which food is the highest in fiber?

Lentils are the highest in fiber among the options provided. They are legumes that are particularly rich in dietary fiber, which promotes digestive health, helps maintain healthy blood sugar levels, and can contribute to a feeling of fullness. A single cup of cooked lentils contains around 15-16 grams of fiber, making them an excellent source for increasing fiber intake.

In comparison, skim milk, fatty fish, and whole milk contain minimal to no dietary fiber. Skim and whole milk primarily provide calcium and other nutrients but lack fiber content, while fatty fish like salmon or mackerel are rich in omega-3 fatty acids but also do not contain fiber. Thus, lentils stand out as the superior source of fiber in this context.