Provided are fortified beverages, in particular fruit or vegetable juices, enriched with fruit or vegetable fiber in a nutritionally effective amount, and methods of manufacture thereof. In particular, the provided are methods for increasing the percentage of dietary fiber in fruit or vegetable tissue mass added to fruit or vegetable juice, thereby providing a fruit or vegetable juice enriched with fruit or vegetable fiber, the methods including at least one step of washing followed by a step of centrifugation, and excluding steps of drying at elevated temperatures or exposure to any chemical treatment.