How Essential Oils Work, Results, Usage, and Side Effects

In the search for natural alternatives to address hair loss, essential oils have emerged as a promising option. Known for their potent plant extracts, these oils contain various compounds that may benefit scalp and hair health. Among them, rosemary oil has gained attention for its potential to stimulate hair growth and improve hair thickness. It is thought to enhance blood circulation to the scalp and may also counteract the effects of dihydrotestosterone (DHT), a hormone implicated in hair loss. Additionally, oils like lavender and peppermint have shown promise in studies for their hair growth-promoting properties. This article delves into how essential oils can be used to combat hair loss and the scientific evidence supporting them.  

Bottles of essential oils as natural treatments for hair loss

What Are Essential Oils?

Essential oils are concentrated, volatile plant extracts known for their aromatic and therapeutic properties. Obtained through methods like steam distillation or cold pressing, these oils capture the essence of the plant. Each oil, derived from various parts of plants like flowers, leaves, bark, or roots, possesses a unique chemical composition that defines its specific aroma and potential health benefits. Used for centuries in practices like aromatherapy and traditional medicine, essential oils play a significant role in holistic health.

How Essential Oils Treat Hair Loss

Essential oils may help in treating hair loss through several mechanisms, owing to their unique properties and compounds. Here are some ways they might contribute to hair health and growth:

  • Stimulating Blood Circulation: Some, like rosemary and peppermint, can stimulate blood flow to the scalp. Increased blood circulation can bring more nutrients and oxygen to hair follicles, potentially promoting hair growth and strengthening hair roots.
  • Balancing Scalp Health: Oils like tea tree and lavender have antibacterial and antifungal properties. These can help maintain scalp health by reducing dandruff and other scalp conditions that can contribute to hair loss.
  • Reducing Inflammation: The ones with anti-inflammatory properties, such as chamomile and lavender, can soothe the scalp and reduce inflammation. This is often a contributing factor in hair loss.
  • Hormonal Balance: Some oils might influence the hormonal balance that affects hair growth. For example, rosemary oil is believed to inhibit the activity of 5-alpha-reductase, an enzyme that converts testosterone into dihydrotestosterone (DHT), a hormone linked to certain types of hair loss, like androgenetic alopecia.
  • Nourishing Hair Follicles: Oils rich in nutrients, like vitamin E and fatty acids, can nourish hair follicles, strengthening hair and preventing hair loss.
  • Stress Reduction: As stress can be a factor in hair loss, the calming and relaxing properties of some types, used in aromatherapy, might indirectly contribute to healthier hair growth.

It’s important to note that while essential oils can be beneficial for hair health, they should be used correctly. This includes diluting them with a carrier oil to avoid irritation.

Empirical Evidence

Several studies have been conducted to evaluate the effectiveness of essential oils in treating hair loss, showing promising results:

  • Scotland Study on a Blend of Essential Oils: A study conducted in Scotland involved 86 patients with hair loss. The participants massaged their scalps with a blend of essential oils, including rosemary, cedarwood, lavender, thyme, and a carrier oil like jojoba oil. After seven months, this group showed more significant improvements in hair loss compared to a control group that used only the carrier oil​​.
  • Randomized Controlled Trial for Alopecia Areata: A randomized controlled trial showed that aromatherapy using essential oils was a safe and effective treatment for alopecia areata. The treatment with essential oils was significantly more effective than using the carrier oil alone. This indicates a positive role of essential oils in hair regrowth.  
  • Study on Rosemary Oil: A 2015 study compared the effectiveness of rosemary oil with minoxidil, a well-known hair loss treatment. The research focused on individuals with androgenic alopecia (male or female pattern baldness). It found that rosemary oil was as effective as minoxidil in encouraging hair regrowth​​.
  • Peppermint Oil Study: Another study, using peppermint oil, observed an increase in the number of follicles, follicle depth, and overall hair growth. This suggests that peppermint oil might have a stimulating effect on hair growth​​.
Results of clinical trials comparing rosemary essential oils with 2% minoxidil in treating hair loss

Clinical results of using rosemary oil compared to 2% minoxidil in treating hair loss after 6 months.


User-reported benefits of essential oils for treating hair loss typically include the following experiences:

  • Improved Hair Growth: Many users report that certain essential types, like rosemary and peppermint, seem to stimulate hair growth. This leads to fuller, thicker hair over time.
  • Reduced Hair Thinning: Users often observe a decrease in hair thinning, especially when using oils known for their ability to strengthen hair.
  • Healthier Scalp Condition: Some, like tea tree and lavender are known for their antimicrobial properties. They are frequently credited with improving scalp health, reducing issues like dandruff and dryness, which can contribute to hair loss.
  • Increased Hair Shine and Vitality: Some users note that their hair appears more vibrant and shiny after incorporating them into their hair care routine.
  • Less Scalp Itching and Irritation: They are often found to be soothing for the scalp. This reduces itching and irritation, which can be beneficial for those experiencing hair loss due to inflammatory scalp conditions.
  • Stress Reduction: The aromatic properties of essential oils are credited with reducing stress, a known contributor to certain types of hair loss. Users often report feeling more relaxed after using these oils, particularly in aromatherapy.
  • Natural Alternative: Many users prefer essential oils as they are natural alternatives to treating hair loss. This may be preferable to conventional hair loss treatments, which can have side effects or use harsh chemicals.
Before and after results of using essential oils (rosemary oil) to treat hair loss

Comparison showing the results of using rosemary oil to treat hair loss.

How to Use Essential Oils

Using essential oils for treating hair loss involves a few key steps to ensure effectiveness and safety. Here’s a general guide on how to use them:

  • Choose the Right Essential Oil: Select essential oils known for promoting hair growth and scalp health, such as rosemary, peppermint, lavender, cedarwood, and tea tree oil. Each oil has different properties, so you might want to do a bit of research or consult a professional to find the best match for your specific needs.
  • Dilute the Essential Oil: Essential oils are highly concentrated and should be diluted with a carrier oil to prevent irritation. Common carrier oils include jojoba, coconut, olive, and sweet almond oil. A typical dilution ratio is a few drops of essential oil per tablespoon of carrier oil.
  • Patch Test: Before applying the oil blend to your scalp, do a patch test on a small area of skin, like the inside of your wrist, to ensure you don’t have an allergic reaction.
  • Application: Massage the oil blend into your scalp. Use your fingertips to gently rub the oil into your scalp in circular motions, which can help increase blood flow and enhance absorption.
  • Leave It On: Depending on the oil and your routine, you might leave it on for at least 30 minutes or overnight. If leaving it overnight, consider wearing a shower cap to protect your pillow.
  • Wash Off: Rinse out the oil using your regular shampoo. You might need to shampoo twice to ensure all oil is removed, especially if using heavier carrier oils like coconut oil.
  • Frequency: The frequency of application can vary. Some people use essential oil treatments once or twice a week, while others might use them less frequently. Listen to your body and adjust according to your hair and scalp’s response.

Safety and Side Effects

While essential oils can offer potential benefits for hair loss, they also come with potential side effects, particularly if used improperly. Here are some common side effects to be aware of:

  • Skin Irritation and Allergic Reactions: Essential oils are highly concentrated and can cause irritation, redness, and allergic reactions in some individuals. This is more likely if the oil is not properly diluted with a carrier oil.
  • Scalp Sensitivity: Some people may experience increased sensitivity of the scalp, including burning or stinging sensations, especially when using certain oils like peppermint or tea tree oil.
  • Over-Drying or Oily Scalp: Depending on the oil and the carrier oil used, some people might find that their scalp becomes either too dry or excessively oily, which can affect hair health.
  • Headaches or Dizziness: The strong aromas of some essential oils can cause headaches or dizziness in sensitive individuals, particularly if used in large quantities or in enclosed spaces.
  • Photosensitivity: Certain essential oils, especially citrus oils like bergamot, can make the skin more sensitive to sunlight, leading to a risk of sunburn.
  • Hormonal Effects: Some essential oils, like lavender and tea tree oil, have been reported in a few studies to have estrogenic effects, which might be a concern for certain individuals, though more research is needed in this area.
  • Interference with Medications: Essential oils can sometimes interact with medications, so it’s important to consult with a healthcare provider if you’re on medication or have a health condition.
  • Inhalation Risks: Inhaling essential oils directly from the bottle or using them in a diffuser can occasionally lead to respiratory irritation, especially in those with asthma or allergies.


While essential oils offer a natural and potentially effective solution for treating hair loss, their use requires careful consideration. They have been known to stimulate hair growth, improve scalp health, and enhance the overall quality of hair. However, it’s crucial to approach use with caution due to the potential for irritation, allergic reactions, and other side effects. Proper dilution with carrier oils and conducting patch tests are vital steps to ensure safety and effectiveness. While essential oils may not be a universal remedy for all types of hair loss, they can be a valuable part of a holistic approach to hair care and wellness, particularly for those seeking natural alternatives.


  • Effect of a Mixture of Essential Oils on Hair Loss in Patients: A Randomized Study in Scotland
  • Aromatherapy as a Treatment for Alopecia Areata: A Randomized Controlled Trial
  • Comparison of Rosemary Oil and Minoxidil for the Treatment of Androgenic Alopecia: A Study Focused on Male and Female Pattern Baldness (2015)
  • Efficacy of Peppermint Oil in Promoting Hair Growth: An Experimental Study on Mice

Note: This piece serves as an informative overview. Individual responses may vary, and consultation with a qualified medical professional is indispensable before initiating any therapeutic regimen.

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