Apples are some of the most fibrous fruits out there, while also being low on calories. It has 5.4 grams of fiber per large fruit (223 grams), and only 116 calories.
Having that much fiber means that fruits like apples are more filling, and lead to you feeling fuller for much longer after having eaten one, which can lower your daily food intake.
In a study, women were given either three apples, three pears, or three oat cookies per day, for 10 days. Out of all three, the apple group had the biggest change in weight, having lost 2 pounds, while the pear group lost 1.6 pounds, and the oat cookie group did not have any weight change.
Researchers say that apples should be eaten whole, rather than juiced, because that way, it maintains all the fibers and control your appetite.