Enjoy Sealand Birk Raspberry Birch Juice (10x11.5Oz). A birch tree naturally filters over 100 litres of water through its root system a day, the natural root filtering purifies and adds minerals/nutrients. A single birch tree can hold hundreds of litres of natural birch tree juice. Sealand birch tree juice is tapped and harvested before the trees get leaves. Enjoy Sealand BIRK cold. Note: description is informational only. Please refer to ingredients on the product before use. Please address any health or dietary questions to your health professional before using this item.