What's inside apple, and where does it go in your body?
A crunchy package of water, natural sugars and soluble fiber (pectin), much of it close to the skin.
Notable for
Fiber (especially pectin), vitamin C and polyphenols in the skin.
Whole vs juice
Juicing removes most fiber; whole fruit is more filling and slows sugar absorption.
Evidence & sources
A medium apple with skin provides about 4 g of fiber. Evidence: established. Known: Measured food composition data. Unknown: Peeling removes part of the fiber. Source: USDA Agricultural Research Service, FoodData Central (SR Legacy) (2019).