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How long does it take to see results?
The science suggests that it may work but as with anything there is a catch, rosemary oil needs to be applied in the right quantities, over a long period of time to see results. “There is limited evidence for rosemary oil as a hair loss treatment, but seeing results from any hair loss treatment takes time, due to the average rate of hair growth, typically 1-1.5cm per month,” says Passam. The experts agree that it takes six months (at least) to see results.
It's also important to note that hair growth can also be influenced by a variety of factors, including genetics, nutrition, stress, and hormonal changes, and the use of rosemary oil alone is unlikely to be the panacea for all hair growth.
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How can I use rosemary oil for hair?
According to Fisherman, “when applying rosemary oil to your hair and scalp, it's important to dilute it with a carrier oil such as jojoba, coconut, or olive oil. This helps to prevent skin irritation and ensures that the oil is evenly distributed throughout your hair." Then leave the oil on your hair for at least 30 minutes before rinsing it off with shampoo and water. “Because rosemary oil can cause skin irritation, avoid using on inflamed or broken skin,” adds Passam.
After applying diluted rosemary oil, Viviscal Ambassador andtrichologist Hannah Gaboardi recommends using a scalp massager. "Scalp massaging increases hair thickness by stretching the cells of hair follicles. This then stimulates the follicles to produce thicker hair. So using it in conjunction withrosemaryoil would be very effective’’.
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“Using rosemary oil directly on your hair strands can provide additional benefits such as improving hair texture, reducing split ends, and enhancing shine. To apply rosemary oil directly to your hair strands, you can add a few drops of the oil to your regular shampoo or conditioner, or create a hair mask by mixing the oil with a carrier oil and leaving it on for 20-30 minutes before rinsing. However, it's important to note that using too much rosemary oil directly on your hair can lead to dryness and irritation, so be sure to use it in moderation and dilute it properly with a carrier oil,” Fisherman warns.
Can rosemary oil help with hair loss caused by alopecia?
Alopecia is a medical condition that can cause hair loss and baldness that can affect any body part – there is no known cure for it yet, though there are experts who can help. Rosemary oil has been reported to help with hair loss caused by alopecia, but only anecdotally, since rosemary oil stimulates hair follicles and improves circulation to the scalp. Fisherman believes that rosemary oil alone is not the cure for alopecia, and it may not be the most effective hair treatment. However he adds: “incorporating rosemary oil into your hair care routine may still have beneficial effects on hair health and growth, and it may be worth discussing with a healthcare provider or board-certified dermatologist as part of a comprehensive treatment plan.”
What are the side effects of using rosemary oil for hair?
Rosemary oil is known to have little-to-no side effects and is safe for all hair types, including coloured hair. “Like other essential oils, however, pure rosemary oil has active components and can result in scalp irritation,” flags Kaur. This is why it should always be diluted with a carrier oil. Also, it's a good idea to do a patch test with several drops of rosemary oil before applying it more liberally – “if there is irritation, stop using it immediately.”
For more from Glamour UK Beauty WriterShei Mamona, follow her on Instagram @sheimamona. And for more beauty and wellness content from Glamour UK Commerce Writer Denise Primbet, follow her on Twitter @deniseprimbet and Instagram @deniseprimbet.
