The short answer is possibly. Kalona SuperNatural does testing on our products to determine the best sell by date for our products. Because dairy products are fresh and perishable, the exact date of when the product will begin to lose quality can be difficult to know. As with many perishable items (fresh fruit, vegetables, etc.), there are times when the product is good well beyond the sell by date.
However, there will also be times when the product will begin to show signs of loss of quality (sourness in aroma or flavor) before the sell by date. We have two recommendations.
1. Consume fresh dairy products within 5 - 7 days of opening. Once the dairy product is exposed to oxygen it will begin losing quality and is recommended to be consumed as soon as possible. Cultured dairy products such as our Buttermilk, Kefir, Yogurt, Cottage Cheese, and Sour Cream will typically last up to 14 days if kept cold.
2. Keep your dairy products (fresh or cultured) stored in a sealed container at the back of your refrigerator. Do not store your milk in the door. Everytime you open your refrigerator it is hit with warm air from your house which will affect how long your milk lasts. If you sense the products do not smell or taste right, please do not consume and contact us so we can we can investigate the issue..