Acai’s dark purple berries are from a palm tree found throughout South America and are touted as an antioxidant-rich food source that some nutritionists believe can protect cells from damage, according to WebMD. Proponents say the berries are richer in antioxidants than cranberry, raspberry, blackberry, strawberry or blueberries.

A representative for Trader Joe’s told Nexstar on Thursday that the frozen product is not currently available at stores amid the recall.