Frozen blueberries are a popular, cost-effective alternative to fresh berries, but they often need to be washed before consumption. In Korea, frozen fruits are categorized as either 'processed products' or 'agricultural products'. Processed products are pre-washed, while agricultural products are not and may contain bacteria or pesticide residues. Consuming unwashed frozen blueberries can lead to stomach discomfort or health issues. Recent inspections in Korea found some frozen fruit products exceeded bacteria limits. Therefore, it's recommended to always rinse frozen blueberries briefly under running water. Interestingly, research shows freezing blueberries increases their antioxidant and vitamin content compared to fresh blueberries.
