POSTED: 14 Jul 2024

Does Rosemary Oil Really Work for Hair Growth?

The medicinal uses of Rosemary oil date back to ancient times where it was also a symbol of remembrance and fidelity. Fast forward to modern times Rosemary oil has exploded in popularity as a treatment for hair loss and promoting growth. However, there are conflicting opinions about how much of this is due to hype vs actual results. In this article, we explore the evidence behind Rosemary oil as a treatment for hair loss and review the science behind how it can help with regrowth. We’ll also review how to use it to get healthier, thicker and longer hair.

What is Rosemary Oil?

Rosemary oil is an essential oil from the aromatic herb, Rosmarinus officinalis, which is popular in the health & wellness sphere. Known for its woody, evergreen scent, Rosemary oil is extracted through the process of steam distillation. It’s rich in antioxidants and anti-inflammatory compounds which is why it has a long history of use in traditional medicine. This includes as a treatment to enhance memory, relieve muscle pain and boost the immune system. Rosemary oil is also very popular in cosmetics with a wide range of uses such as skin healing and hair loss treatment.

The Science Behind Rosemary Oil for Hair Growth

There is a good body of research that supports the value of Rosemary oil as a natural treatment for hair loss prevention. In fact when Rosemary oil was compared with 2% Minoxidil over a 6 month period in a clinical study, it was found to be as effective in promoting hair growth with fewer side effects.

The primary mechanism by which Rosemary oil aids hair growth seems to be its ability to improve blood circulation. When massaged into the scalp, rosemary oil increases blood circulation which ensures that hair follicles receive a rich supply of nutrients and oxygen necessary for growth. This improved circulation stimulates the hair follicles to encourage the production of new hair. Additionally, Rosemary oil contains ursolic acid, which helps to unclog hair follicles. It also possesses anti-inflammatory and antimicrobial properties that help to maintain a healthy scalp by reducing dandruff and scalp irritation. Both of these actions improve the environment for hair growth. However, despite claims from Rosemary oil enthusiasts, there is no evidence yet that it inhibit the production of dihydrotestosterone (DHT), a hormone linked to hair thinning and loss.

Benefits & How Long Results Take

Given its multi actions on hair and scalp, there are several key benefits of using Rosemary oil. The main benefits of Rosemary oil as a hair treatment are:

  • Stimulates Hair Growth: Rosemary oil’s ability to dilate blood vessels and stimulate hair follicles promotes the growth of new hair. Regular application can lead to thicker, stronger hair.
  • Improves Scalp Health & Prevents Hair Loss: The anti-inflammatory and antimicrobial properties of Rosemary oil soothe the scalp and prevent dandruff and irritation which can contribute to hair loss.
  • Strengthens Hair & Enhances Shine: The nutrient-rich composition of rosemary oil strengthens the hair shaft, reducing breakage and split ends. It also aids in the repair of damaged hair, restoring vitality and shine.

Any benefits of using Rosemary oil are gradual and results varying based on individual factors like hair type, extent of hair loss and consistency of application. Generally, you might see initial improvements such as reduced hair shedding and improved scalp health within the first one to three months of regular use. More noticeable results, including thicker hair and new growth in thinning areas, typically appear around the three to six-month mark. To ensure sustained benefits and continued growth, you’ll need to use it consistently for over six months.

How to Use Rosemary Oil for Hair Growth

It’s actually pretty easy to add Rosemary oil into your hair care routine. However, like any hair growth treatment you will need to use it regularly and for a prolonged period to see results. Here are our best tips for using Rosemary oil for your hair:

  • Choose your product: Rosemary oil is available as a concentrated essential oil or in a number of pre-made products that are ready to use. The latter are easiest and most people get on well with a rosemary oil serum product that they can apply directly on to the scalp. If you prefer to make your own products, dilute a few drops of Rosemary oil with a carrier oil, such as coconut or jojoba oil to create your own treatment.
  • Scalp Massage: Gently massage Rosemary oil into your scalp for 5-10 minutes. This ensures even distribution, boosts absorption and stimulates circulation. Leave the oil on for a minimum of 30 minutes, though overnight application can yield better results.
  • Regular Frequency: For best results, apply Rosemary oil to the scalp at least twice a week though 3-4 times is ideal.

Side Effects of using Rosemary Oil

Although Rosemary oil is generally safe, it’s important to be aware of potential side effects. These are especially likely when used incorrectly or in excess. Here are some of the key side effects to consider:

  • Skin Irritation & Allergic Reactions: Undiluted Rosemary oil can cause redness, itching or a burning sensation on the scalp. To avoid this, always dilute pure Rosemary oil with a carrier oil before application or use a ready to use product. Additionally, conduct a patch test on a small area of skin before full application to help identify any allergic reactions. If irritation occurs, discontinue use and seek medical help.
  • Sensitivity to Sunlight: Rosemary oil can increase your skin’s sensitivity to sunlight, leading to a higher risk of sunburn. Ensure you rinse the oil thoroughly from your hair and scalp before going out in the sun or by using the oil in the evening or overnight.
  • Hormonal Effects: Although rare, there have been reports suggesting that Rosemary oil might influence hormonal balance. This is particularly relevant for pregnant or breastfeeding women and people with hormone-sensitive conditions, who should consult their healthcare provider before using it.
  • Respiratory Issues: Inhaling concentrated Rosemary oil can sometimes cause respiratory issues, such as coughing or difficulty breathing. This is especially likely in people who have asthma or other respiratory conditions. It’s important to use rosemary oil in well-ventilated areas and avoid inhaling the oil directly from the bottle.
  • Eye Irritation: Avoid getting rosemary oil into the eyes, as it can cause severe irritation. If this happens, rinse your eyes immediately with plenty of water and seek medical attention if irritation persists.
  • Drug Interactions: Rosemary oil may interact with certain medications, particularly anticoagulants, ACE inhibitors and diuretics. If you are taking any prescription medications, check with your medical provider before using it.

Rosemary Oil vs Other Hair Loss Treatments

Rosemary oil stands is a natural free, easily available, gentle and cost-effective hair loss treatment. That being said, there are of course limits to what it can do. In more severe or extensive cases of hair loss, it may be worth considering alternatives. More often than not, hair loss treatments are used in combination with each other and even with Rosemary oil. Below are the most well-established non surgical hair loss alternatives to Rosemary oil:

  • Minoxidil: This topical treatment is available over the counter at up to 5% strength. You will need a prescription for higher strengths or combination treatments containing other medicines. Like Rosemary oil it stimulates hair follicles by enhancing blood flow to the scalp. This extends growth phase of the hair cycle.
  • Finasteride & Dutasteride: These are prescription only medicines (available as oral or topical treatments). They reduce hair loss by inhibiting the 5-alpha-reductase enzyme which lowers DHT levels. Although effective, they carry potentially serious hormonal side effects and so are generally mainly preserved for male pattern baldness or hair loss in post menopausal women.
  • Spironolactone: This is a prescription only medicine with anti-androgen properties that effectively treats hormone-related hair loss in women by blocking androgen receptors. It is available as an oral or topical hair loss treatment. Whilst spironolactone is preferred for female pattern hair loss in premenopausal women, it is not suitable for male pattern hair loss.
  • Biotin: Also known as vitamin B7, Biotin promotes growth by strengthening hair strands, improving elasticity and preventing breakage. Biotin supplements are widely available and often recommended for those experiencing hair thinning or loss often alongside other treatments.

Rosemary oil is an effective natural remedy for promoting hair growth and treating mild hair loss. Its rich composition of nutrients and antioxidants stimulate blood circulation as well as optimise the overall environment for hair growth. This improves scalp health and stimulates the hair follicles. It is important to remember that this is not an overnight solution. As such, patience and persistence are vital to getting results. Similarly, everyone is different and this will affect how your hair responds to Rosemary oil treatment. For this reason. you may need to consider other established hair loss treatments. These can either be an alternative or used alongside Rosemary oil to boost its effects.

We know that hair regrowth is a deeply personal journey. This is why we launched personalised hair loss and regrowth treatments through our online clinic. Our doctors create custom hair loss treatments using actives like MinoxidilSpironolactoneFinasterideDutasteride and Tretinoin for each and every patient. We also treat skin concerns like acnehyperpigmentationmelasma and signs of skin ageing with bespoke skincare treatments. Book your virtual consultation and start your journey to great hair today.

Authored by:

Dr Amel Ibrahim
Aesthetic Doctor & Medical Director
BSC (HONS) MBBS MRCS PHD
Founder City Skin Clinic
Member of the Royal College of Surgeons of England
Associate Member of British Association of Body Sculpting GMC Registered - 7049611

Connect with us

  • Facebook Logo
  • Twitter Logo
  • Instagram Logo
  • Pinterest Logo
  • YouTube Logo
  • LinkedIn Logo

Start Your Online Consultation

The journey to great skin starts here. Start your online consultation for personalised prescription-strength skincare.

Start Consultation