60-count (1-month suppy) of 500 mg capsules taken twice daily with, or without, a meal.
The National Center for Biotechnology Information (NCBI) states,
Nigella sativa has been used as traditional medicine for centuries. The crude oil and thymoquinone (TQ) extracted from its seeds and oil are effective against many diseases like cancer, cardiovascular complications, diabetes, asthma, kidney disease etc. It is effective against cancer in blood system, lung, kidney, liver, prostate, breast, cervix, skin with much safety. (Abstract, paragraph 1)
For thousands of years, the seeds, oils and extracts of N. sativa have been used as an anticancer agent by Unani, Ayurveda and the Chinese system of medicine that have originated from Africa and the Arab, Ind-Bangla and China, respectively.