Black seed oil is a supplement that improves gluten tolerance, increases insulin concentration and lowers glucose levels in patients. This makes it one of the few drugs that can be used to prevent both type 1 and type 2 diabetes.
Black seed is extracted from Southwest Asia Nigella sativa, a plant which has been used medicinally for thousands of years. Even though it is widely used to treat diabetes and epilepsy, there is great debate over evidence of its usefulness.
Although it is generally safe for anyone to use in small amounts, it may be harmful to pregnant women if taken in medicinal doses.