What is X-Factor Concentrated Butter Oil (High Vitamin Butter Oil)? Green Pasture Concentrated Butter oil is a butter oil concentrated through centrifugation. This oil is sourced from 100% grass-fed cows that graze on nutrient-rich, fast growing grass. High Vitamin Butter Oil is an amazing source of Vitamin K2, which helps to deliver calcium to the bones. Vitamin K2 also helps keep calcium out of places it shouldn't be, such as the soft tissues. To receive the maximum amount of healing benefits from High Vitamin Butter Oil, combine with Green Pasture Fermented Cod Liver Oil. You can also receive the benefits of both by taking Green Pasture Blue Ice Royal, which is a blend of Concentrated Butter Oil and Fermented Cod Liver Oil. About Green Pasture Green Pasture is an eco-conscious, family-owned company with ethically-sourced product. Their cod livers are sourced from wild-caught cod in Arctic regions. Green Pasture makes sure nothing goes to waste - the byproduct created from their fermented cod liver oil is used as fertilizer and animal supplements. Their Blue Ice Cod Liver Oil supply and manufacturing chain has a Marine Stewardship Council certification, which reinforces their desire to protect the environment and ensures traceability & sustainability. Note: Manufacture date vs. expiration date Green Pasture lists the manufacture date on their bottles, instead of the expiration date. The FDA allows manufactures to list either one. When listing the manufacture date, manufactures can get their product to the consumer shortly after it has been packaged. When listing the expiration date, manufactures must have further testing done on the product to test for stability, which may take anywhere between 6 and 12 months. Because Green Pasture lists the manufacture date,