**CRANBERRY: Benefits, Side Effects, Uses, Dosage, Warnings?** Plants have not finished making solutions to our health problems. Cranberry, for example, has been proven in the treatment of urinary problems *. Native to North America, this somewhat larger than its European cousin, the cranberry red berry has been ... than fresh fruit (potassium, calcium, magnesium, iron). The fiber is also much greater in dried than fresh fruit fruits, which helps eliminate cholesterol.