Oil pressed from Nigella sativa seeds. Its main active is thymoquinone, a compound with antioxidant properties. People take it to support immune function and help maintain a balanced inflammatory response.
Many prefer the oil for convenience and take it with meals to make it easier on the stomach. Capsules are a taste-free option if you want to avoid the liquid.
Important caution: this oil may slow blood clotting. It can interact with anticoagulant or antiplatelet drugs. Stop taking it at least two weeks before any planned surgery.