Another one from the natural spice oil category, black pepper oil is also used in cooking as well used as an essential oil. It is used to provide relief from cramps and spasms and is good for the digestive system. It helps in rheumatism and arthritis. To get relief from nasal congestion and sinusitis; you can use black pepper oil. Ajmal Biotech Pvt. Ltd is known as one of the top black pepper oil suppliers with a long list of clients to serve.