Natural Rosemary oil extracted the old Egyptian Way cold press The idea that rosemary oil encourages hair growth may come from the rosemary’s basic health benefits. Rosemary oil strengthens circulation. As a result, it could prevent hair follicles from being starved of blood supply, dying off, and leading to hair loss. How should I use rosemary oil for hair loss? Here are a few ways to try using rosemary oil as a hair restorative and thickener. Try any of these treatments one to two times per week to start out. Use them more often when desired or you’ve become comfortable using them. 1. Massage it directly into your scalp Take about 5 drops of rosemary oil and massage evenly into your scalp let the oil sit on your scalp for at least 5 to 10 minutes before you wash it. 2. Mix it into your shampoo This can also apply to conditioners, lotions, or creams. Play it safe and don’t add too much. Keep to about five drops per ounce of product. Afterward, use the product like usual. You can also add 2 to 3 drops directly to any hair product.