Rosemary oil has been generating buzz on TikTok, not just for its delightful fragrance but also for its potential benefits in promoting hair growth. But is there any truth to all the social media hype? To delve deeper into this topic, we sought insights from New York City-based board-certified dermatologist Hadley King, celebrity hairstylist Dominick Pucciarello, and celebrity hairstylist, colorist, and Creative Director of Style & Color for L'Oréal Paris, Jonathan Colombini. Additionally, we'll be sharing some of the best rosemary oil hair products for you to try.

What Are the Benefits of Rosemary Oil?

1. Hair Thickening: Research indicates that rosemary oil may be as effective as Minoxidil, the active ingredient in Rogaine, for promoting hair growth.
2. Antimicrobial Properties: Rosemary oil possesses antimicrobial and anti-inflammatory properties that can help soothe the scalp.
3. Dandruff Control: The antimicrobial and anti-inflammatory properties of rosemary oil can assist in keeping dandruff and scalp acne at bay.
4. Breakage Prevention: Rosemary oil can help prevent hair thinning caused by breakage, particularly due to aging or hormonal conditions.
5. Suitable for All Hair Types: Rosemary oil is generally safe for use on all hair types. However, if you experience any allergic reactions, it is advisable to discontinue use and consult a dermatologist.

Can Rosemary Oil Help Thicken Hair?

Yes, there is evidence suggesting that rosemary oil may aid in hair thickening. King explains that a 2015 study compared the effects of rosemary oil and Minoxidil on hair growth, and both groups experienced significant increases in hair growth after six months. The improvement could be attributed to rosemary oil's enhancement of micro-capillary perfusion. However, King emphasizes that Minoxidil remains the most scientifically proven over-the-counter option, suitable for both men and women.

To elaborate, King describes Minoxidil as a potassium channel opener, which hyperpolarizes cell membranes. This action widens blood vessels and opens potassium channels, allowing more oxygen, blood, and nutrients to reach the hair follicles. While rosemary oil can be an alternative, further research is needed to fully evaluate its effectiveness. King stresses the necessity for larger and more comprehensive studies on oils to determine whether these ingredients can truly aid in hair growth.

How Long Does It Take for Rosemary Oil to Work?

Due to the hair growth cycle, any noticeable effects on hair growth may take around six months to manifest. King cites the aforementioned 2015 study with rosemary oil, which demonstrated results after six months of use.

How Often Should Rosemary Oil Be Applied?

Colombini suggests applying rosemary oil daily or after every hair wash. You can use it to replenish the hair's natural oils or address specific problem areas.

How Should Rosemary Oil Be Applied? According to Colombini, rosemary oil can be directly applied to the scalp or incorporated into hair products. For addressing hair growth concerns, apply the oil directly to the scalp and massage it in for a few minutes. If you aim to tackle hair breakage or dryness, apply the oil to the hair shaft to facilitate the transfer of sebum, the hair's natural oils, which act as a protective barrier. Colombini also recommends using products that contain natural rosemary essential oils for added benefits.

While rosemary oil shows promise in promoting hair growth, it's important to remember that further research is necessary to establish its efficacy conclusively.