Black seed oil comes from the same Nigella sativa plant covered as a whole seed elsewhere in this Atlas, pressed specifically into oil form — a preparation with its own distinct body of clinical research, particularly for respiratory and cardiovascular applications.
The oil form carries the same deep historical reputation as the whole seed — including the Islamic Hadith describing it as a remedy for "every disease except death" — but modern research has increasingly focused on oil-based preparations for specific, testable applications.
Black seed oil has a genuinely substantial body of randomized controlled trial evidence across several applications. A meta-analysis of trials (187 participants) found Nigella sativa oil supplementation improved Asthma Control Test scores and lung function (FEV1) compared to control. For blood pressure, a randomized, double-blind, placebo-controlled trial in 70 healthy individuals with elevated-normal blood pressure found significant reductions in both systolic and diastolic pressure with no serious adverse events.
For cholesterol and metabolic markers, multiple RCTs report small average reductions in fasting glucose, HbA1c, cholesterol, and triglycerides — but reviewers describe this evidence as showing "inconsistent findings and generally low-to-very-low certainty." Given genuine RCT-level evidence with meta-analysis support for asthma specifically and real positive blood pressure trials, but explicitly lower-certainty evidence for broader metabolic claims, "Moderate" is the accurate, appropriately differentiated rating.
Cold-pressed from Nigella sativa seeds; taken orally, often with honey in traditional Middle Eastern and South Asian folk remedies.