How to Drink Sea Buckthorn Juice How you drink it will depend on the product, but generally it is taken by diluting 20-30 ml of juice in a glass of water. Can be consumed in the morning or before meals in a well-rounded diet. You can even stir it into smoothies or other beverages for a refreshing drink. Shake well before use. Follow serving directions on the label. If you are pregnant, nursing, have a medical condition or are taking medications, consult a health care professional before using sea buckthorn juice.