Methods
BLOOD
This is a placebo-controlled, double blinded, randomized clinical trial. The study was conducted on healthy male and female students studying in Imam Abdulrahman bin Faisal University (IAU), Dammam, Saudi Arabia. Blood extraction was carried out in the main campus University Family Medicine Center. Students received the intervention for one month and were divided into four groups; three were given different doses of black seed and the fourth was given charcoal and served as control.