Natures Blends Black Seed line is sourced from the fertile warm lands of Ethiopia. Ethiopia is known for the most potent Black Seed oil owing to the climate and growing conditions. We also cold press our seeds and only once without any added heat, additives, or preservatives. We preserve the purest form of virgin Black Seed oil to reach the highest level of volatility at 3.9%. Our Black Seed has also been lab tested for its Thymoquinone (TQ) level - the ingredient responsible for the healing effects - our oil was given a 2.5% TQ percentage. Typically Black Seed oil found on the market has a TQ level of less than 0.5%. The certificate can be found below. We stand by the quality of our oil and are proud to offer the highest purity standard of authentic Ethiopian Black Seed oil on the market. 100% natural cold pressed Nigella Sativa Oil To be taken as a food supplement. Mix quarter - half teaspoon of black seed oil in a glass of warm water. Can be taken up to twice daily.