The presence of an antitumor sterol, beta-sitosterol, lends credence to its traditional use to treat abscesses and tumors of the abdomen, eyes, and liver.
N. sativa oil has been reported to be effective in treating opioid dependence.
N. sativa also has been reported to reduce calculi formation in rats' kidneys.
The oil contains melanthin, nigilline, damascene and tannin. Melanthin is toxic in large doses and nigelline is paralytic, so this spice must be used in moderation.
Nigella Sativa currently has five (5) FDA separate patents in the U.S. and one (1) in the UK for the treatment of:
1.Diabetes (US 6,042,834)
2.Inhibition of cancer cell growth (US 5,653,981)
3.Improvement of the Immune System (US 5,482,711)
4.Viral Infections (US 6,841,174)
5.Psoriasis (US 6,531,164)
6.Asthma (UK - EP1709995)