When searching for the best black seed oil that contains a high amount of thymoquinone, the following factors must be considered. Here are some features to look for:Ensure that the oil is of the highest quality and does not contain any other compound or is preserved in any way. Always opt for cold-pressed oils and those that have not been processed through heat because heat destroys the beneficial fatty acids present in the oil.Since thymoquinone is the major constituent in black seed oil, it is wise to select a product that contains a high level of thymoquinone. It is recommended to look for products that declare the percentage of thymoquinone on the label and use products with not less than 2% of thymoquinone.Select a product that a third party has analyzed for quality and purity before it hits the market. This serves to ensure that the product has all the ingredients listed on its label and that it does not contain any harmful substances.There is also a way in which the packaging of the black seed oil can influence the quality of the product. The products should be packed in black opaque containers to shield the oil from light and air since these affect the quality of the oil.When it comes to making a purchase, price is not always everything, but it is useful to compare the price per ounce of the product.