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.

Trader Joe's is telling its customers to throw away or return the grocery store chain's organic acai bowls because they possibly contain plastic. The Monrovia, California-headquartered company announced the recall on Feb.