black seed oil is a rich source of unsaturated essential fatty acids (efa's) and offers many nutritional benefits for good health. That provides a convenient way to take a consistent amount of black seed oil with the distinctive taste of the oil. Cold pressed oil. black seed oil is an excellent healer, and its areas of application range from external skin care (psoriasis, eczema, dry skin, joints & scalp massage) and to internal use as a treatment for various complaints (asthma, arthritis, immune system).