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.

The popular breakfast item was recalled last week due to possible plastic contamination. The grocery chain did not say if the product had made anyone ill.

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