Kalonji, also known as black seed or Nigella sativa, is a small black seed with a slightly bitter taste and a pungent aroma. It has been used in traditional medicine for its numerous health benefits. It is believed to have anti-inflammatory, antioxidant, antibacterial, and antiviral properties. It is used to improve digestion, relieve constipation, treat respiratory problems, boost immunity, and promote healthy skin and hair. Kalonji oil is extracted from the seeds and used topically for hair growth and to treat skin conditions like eczema and psoriasis. It can also be consumed in small amounts as a spice or dietary supplement.