Sunny Isle Rosemary Jamaican Black Castor Oil. Rosemary is a popular choice for massage, which can be attributed to its sweetness and freshness. Rosemary essential oil use has proved to be very effective in treating arthritis, gout, cramping of muscles, rheumatism and neuralgia etc. It is beneficial in relieving the tired muscles and also considered advantageous for improving the blood circulation. It plays a vital role in hair care. It protects the hair from the strong hold of dandruff. So for those of you who want a sweet, fresh scent on your skin and, or healthy hair, along with the effectiveness of Sunny Isle Jamaican Black Castor Oil, then this combination is just for you. .