With its enhanced formula, Dr. C. Tuna Vitalizing Concentrated Black Seed Oil helps provide a smooth and silky feeling to the hair. Sweet Almond Oil, Sunflower Oil and Vitamin E help nourish and moisturize the hair. Feel the silky softness instantly. How to Use: First apply the oil to the scalp area for 30 minutes. Then massage gently before rinsing off. For more effective results, apply twice a week and complete your hair care with Black Seed Vitalizing Shampoo and Mask.