Initial Posting: 1/27/2019    Last Update: 10/15/2019
Answer: Black seed oil is promoted as a healthy, alternative oil for use on salads and other foods but it tends to be more expensive than other oils, such as extra virgin olive oil and avocado oil, and has a strong taste that some people find unpleasant.
Limited evidence from clinical studies conducted primarily in Asia suggests that black seed oil, in liquid or capsule form, as well as black seed powder, may be helpful for modestly lowering blood sugar, blood pressure, cholesterol, and weight, and for improving asthma symptoms, but more research is needed to confirm these findings. In addition, for certain conditions, the efficacy may depend on which form is used (oil or powder).
It is important not to confuse black cumin (Nigella sativa) seed with the spice cumin, as they are unrelated.
See the full answer for more information about black seed oil and black seed powder, including the clinical evidence, dosage, and safety.