Top 6 Rosemary Essential Oil Benefits for Memory, Hair & Health

QUICK SUMMARY

Rosemary essential oil is steam-distilled from the aromatic leaves and flowering tops of Rosmarinus officinalis, the ancient “herb of remembrance.” For centuries, rosemary has been used for mental clarity, digestive soothing, muscle comfort, scalp health, circulation, and remembrance.

Research suggests that rosemary essential oil may support memory and alertness, promote scalp health and hair growth, reduce stress-related cortisol, protect liver cells in animal models, support healthy circulation in people with low blood pressure, and demonstrate cancer-fighting activity in in vitro studies.

Rosemary essential oil is best used aromatically, topically when diluted, and in very small culinary amounts when appropriate. Because some rosemary oils are rich in camphor or 1,8-cineole, use extra caution with seizures, young children, pregnancy, hypertension, medications, and internal use.

Known as the “herb of remembrance,” many of the uses for this ancient plant transfer to rosemary essential oil benefits like memory and hair growth.

Yes, we love rosemary on potatoes and chicken, but it’s so much more than a culinary treat and should be used wisely.

Top 6 Rosemary Oil Benefits

Rosmarinus officinalis was a sacred substance for nearly all ancient peoples, including Egyptians, Hebrews, Greeks, and Romans. As an evergreen Mediterranean native, rosemary would have been readily available, so its presence in folk medicine over the centuries is unsurprising.

Ancient peoples used rosemary for many purposes, including:

• Mental clarity
• Digestive soothing
• Muscle pain relief
• Hair and scalp support
• Circulatory stimulation
• Remembrance and emotional stamina

In recent uses, rosemary has been frequently used in skincare and hair products thanks to its known antiseptic ability. As with many ancient remedies, rosemary is the subject of modern research as we begin to unlock the medicinal wisdom of generations past.

Here’s the thing: rosemary essential oil is not simply “rosemary herb in a bottle.” It is a highly concentrated aromatic extract with a chemistry that can vary by chemotype, growing region, harvest, and distillation. Rosemary essential oil may be naturally richer in 1,8-cineole, camphor, verbenone, alpha-pinene, borneol, bornyl acetate, or other constituents, and that matters for both benefits and safety. (11)

“As for Rosmarine, I lett it runne all over my garden walls, not onlie because my bees love it, but because it is the herb sacred to remembrance, and, therefore, to friendship; whence a sprig of it hath a dumb language that maketh it the chosen emblem of our funeral wakes and in our burial grounds.”

~ Sir Thomas More (1478-1535)

Alongside the exciting prospect of slowed cancer growth and inflammation spread, rosemary has effects that are useful for our more common needs as well. Here are six of the ways rosemary essential oil exhibits its strengths in our everyday lives.

1. Cancer-Fighting Research

Although we only have in vitro studies for rosemary essential oil and cancer cells, researchers suggest that rosemary essential oil can help prevent and treat a variety of cancer cell lines. That does not mean rosemary oil has been proven to treat human cancer patients. It means that rosemary essential oil and its constituents have demonstrated cancer-fighting activity in laboratory models, and the findings are worth paying attention to.

Of the 30 compounds in the essential oil, there are a few main players: α-pinene, borneol, (−) camphene, camphor, verbenone, and bornyl-acetate. Interestingly, it doesn’t seem that any one of these chemicals is responsible for rosemary’s anti-tumor prowess. The research actually suggests that it’s the synergy of them interacting together, which gives rosemary essential oil the true medicinal effect.

The study suggesting this was published in the journal Molecules after evaluating in vitro antibacterial activities and toxicology properties of R. officinalis L. essential oil compared to α-pinene, β-pinene, and 1,8-cineole. According to the study, R. officinalis L. essential oil showed greater activity than its individual components in both antibacterial and anticancer test systems, with the whole essential oil exhibiting the strongest cytotoxicity toward SK-OV-3, HO-8910, and Bel-7402 human cancer cell lines. (1)

Newer research has continued this theme. A 2023 study screening rosemary essential oils from different cultivars found strong cellular antioxidant activity and anti-proliferative activity against six cancer cell lines, with especially potent cytotoxicity against the human pancreatic cancer cell line SW1990 and gastric epithelial cell line NCI-N87. The researchers also noted that chemistry matters: different rosemary cultivars produced different oil profiles and biological effects. (11)

This is important. God designed plants with complexity. We see this in food, herbs, and essential oils: whole plant compounds often work through multiple pathways at once.

Application: Use rosemary essential oil as part of a broader cancer-supportive lifestyle: an anti-inflammatory diet, prayer, stress reduction, detoxifying your home, healthy sleep, movement, and physician-guided care. If you are in active cancer treatment or taking medications, discuss essential oil use with your oncologist or integrative practitioner.

2. Hair Growth

Stimulating for the scalp, rosemary essential oil uses include helping with dandruff and dry scalp treatment that may facilitate hair growth. Some even go as far as to say that it can prevent hair loss and graying. (See natural hair growth treatments Mama Z has used postpartum with great success.)

Years ago, Francesc Casadó Galcerá patented a lotion for scalp and hair (US 6447762 B1), including a mixture of rosemary, hops, and swertia. He found that his blend was able to stimulate: (2)

• New hair growth, by as much as 22%
• Stimulated “rapid” hair growth
• Improved scalp health via microcirculation
• Smoother hair
• Retained hair, with fewer incidences of loss after shampooing

More recently, a randomized clinical trial compared rosemary oil with 2% minoxidil in people with androgenetic alopecia. After six months, both groups had a significant increase in hair count, and the rosemary group had less scalp itching than the minoxidil group. (12)

Reality check: rosemary oil is not a magic answer for every kind of hair loss. Postpartum shedding, thyroid imbalance, iron deficiency, stress, autoimmune hair loss, medication effects, hormone shifts, and scalp disease all require root-cause attention. But for scalp circulation, dandruff-prone scalps, and androgenetic-pattern thinning, rosemary deserves a place in the conversation.

Application: Include rosemary essential oil in DIY shampoo and conditioner formulas for improved scalp health and hair growth.

For an easy scalp massage oil, add 3 drops rosemary essential oil to 1 tablespoon jojoba, almond, coconut, or argan oil. Massage into the scalp, leave on for 20 to 30 minutes, then wash out. Start 2 to 3 times weekly and discontinue if irritation occurs.

3. Memory Retention

“There’s rosemary, that’s for remembrance, pray you love, remember.

~ Ophelia (Shakespeare’s “Hamlet”)

Rosemary has been known as the “herb of remembrance” for centuries. Greek scholars used it when taking exams to help recall important information and allusions to its memory improvement have been peppered into poetry throughout the ages. The International Journal of Neuroscience published one study that confirmed these effects in recent science.

Over 140 participants were gathered for the study conducted by the University of Northumbria, Newcastle. Aromatherapy including healing rosemary essential oil uses and lavender, as well as a control group were utilized to affect cognitive performance.

• Regarding lavender and its calming abilities, “lavender produced a significant decrement in performance of working memory, and impaired reaction times for both memory and attention based tasks.”
• On the other hand, as a memory stimulant, “rosemary produced a significant enhancement of performance for overall quality of memory and secondary memory factors.”

In other words, lavender made participants feel relaxed and complacent, while rosemary increased alertness and provoked memory retention. (3)

Another human study found that blood levels of 1,8-cineole after rosemary aroma exposure correlated with cognitive performance. Put simply, rosemary’s aromatic compounds did not just smell nice; measurable compounds were detected in the body and were linked with how people performed on cognitive tasks. (13)

Test-taking and alert feelings pale in comparison to the studies conducted on rosemary essential oil uses in relation to Alzheimer’s disease. One such study, published in Psychogeriatrics, evaluated the effects of aromatherapy on 28 elderly people suffering from dementia, with the majority also diagnosed with Alzheimer’s disease. They were given rosemary and lemon inhalations in the morning, then lavender and orange in the evening. Through multiple tests and forms of analysis, the patients showed significant improvement in personal orientation without any deleterious side effects. (4)

A 2022 systematic review and meta-analysis also concluded that Rosmarinus officinalis improved cognitive function in animal studies and summarized human research suggesting benefits for memory speed, verbal episodic memory, anxiety, depression, sleep quality, and dementia-related aromatherapy support, while noting that more high-quality clinical trials are needed. (14)

Application: Add rosemary to a diffuser while studying, taking a test, or working.

Try 3 drops rosemary, 2 drops lemon, and 1 drop peppermint in your diffuser for a bright focus blend. For nighttime, skip rosemary and choose calming oils like lavender, cedarwood, Roman chamomile, or orange.

4. Liver & Gallbladder Support

The primary function of the liver is to detoxify the body, and with such heavy levels of toxins exposed to us on a daily basis, sometimes it can use a little help.

Traditional rosemary essential oil uses include digestive and gastrointestinal relief. Coupled with liver support, rosemary becomes a fantastic detoxifier. This traditional use makes sense because rosemary has long been associated with bile flow, digestive comfort, antioxidant defenses, and liver support. (5)

Modern research gives us a helpful window into this traditional use. In a rat study evaluating carbon tetrachloride-induced liver injury, rosemary essential oil exerted hepatoprotective effects, reduced liver enzyme markers of damage, and helped protect against lipid peroxidation in liver tissue. The researchers connected this protection to rosemary oil’s antioxidant activity. (15)

This was an animal study, not a human liver-disease trial. Still, it supports the traditional picture: rosemary is a liver-supportive, antioxidant-rich aromatic herb and essential oil. With a properly functioning liver, gallbladder, and gastrointestinal system, nutrients are more readily absorbed and toxins released, bringing balance and wellness to the whole body.

This is why we don’t just reach for oils. We also reduce toxic burden, choose real food, support regular elimination, drink clean water, move the body, and give the liver fewer chemicals to process in the first place.

Application: Try adding a drop of rosemary to your favorite bath bomb recipe or in a detox diffuser blend.

For a daytime detox diffuser blend, try 2 drops rosemary, 2 drops lemon, and 1 drop grapefruit. Avoid using phototoxic citrus oils topically before sun exposure unless you know the oil, dilution, and safety guidelines.

5. Reduced Cortisol Levels

Stress is not “just in your head.” It affects hormones, digestion, immunity, blood pressure, sleep, inflammation, cravings, and how your body repairs itself. That’s why we take stress seriously in biblical health. The peace of God is spiritual, yes, but the body also needs rhythms that help it shift out of fight-or-flight mode.

The Meikai University School of Dentistry in Japan conducted a study that monitored cortisol levels in saliva after just five minutes of rosemary essential oil and lavender inhalation. Twenty-two volunteers participated, and both essential oils had excellent results. Not only was the “stress hormone” cortisol reduced significantly, but free radical scavenging activities were increased as well. So the oils help to prevent added stress, then go a step further to help erase the effects of previous stressful exertion. (6)

This is important because stress chemistry and oxidative stress often travel together. Rosemary’s bright, herbal aroma can be energizing, but research suggests it may also help the body respond to stress in a healthier way.

Application: Use rosemary with other stress-relief essential oils like lavender in a personal inhaler for on-the-go stress management!

For a steady focus inhaler, add 8 drops lavender, 6 drops rosemary, and 4 drops sweet orange to a blank aromatherapy inhaler. Use before work, school, errands, or stressful conversations.

6. Heart Health

Rosemary essential oil is widely recognized for its stimulating effects, particularly in terms of circulation. This is one reason rosemary has traditionally been used when people feel sluggish, foggy, cold, weak, or mentally drained.

Rosemary essential oil has been traditionally used to help manage hypotension, or low blood pressure. It has been shown to increase blood pressure, heart rate, and respiratory rate when inhaled. A study conducted over a 72-week period on 32 patients with primary hypotension found that rosemary oil helped raise blood pressure to normal levels in most of the volunteers. (10)

That is powerful, but it also tells us to use wisdom. For someone with low blood pressure, rosemary’s stimulating properties may be useful. For someone with uncontrolled hypertension or a complex cardiovascular condition, rosemary should be used with professional guidance.

Rosemary is also rich in antioxidant plant chemistry, and oxidative stress is one of the processes involved in cardiovascular damage. That does not make rosemary a stand-alone heart protocol, but it does make it a valuable support alongside the foundations: clean eating, healthy fats, movement, mineral balance, stress relief, prayer, quality sleep, and reducing toxic exposures.

Application: Mix 3 drops of rosemary oil with 5 mL of carrier oil and massage onto the chest area or pulse points to improve circulation. You can also diffuse rosemary oil during the day for mental clarity and heart support.

For more cardiovascular support strategies, see our guide to essential oils for heart health.

Easy DIY Uses

Clearly a safe and effective oil when used wisely, rosemary’s benefits can be implemented in many ways. Here are just some of my favorite DIY recipes for application:

• Inhalation – Add 5 drops to your favorite diffuser.
• Dietary Supplementation – Dilute 1 drop in a teaspoon of honey or coconut oil. Use only a high-quality essential oil labeled for culinary use and only when internal use is appropriate for you.
• Culinary Use – Next time your recipe calls for rosemary, add a drop or two to the entire recipe and experience a Heavenly burst of flavor!
• Topical Application – Enjoy its antioxidant and antiseptic properties on the skin, but be sure to heavily dilute with coconut, almond, or jojoba oil before applying it to the skin.

See more about why dilution is important and then click here to download our free dilution chart guide.

Morning Get-Up-and-Go Diffuser Blend

This simple daytime blend supports rosemary’s traditional use for energy, focus, and mental clarity.

• 3 drops orange essential oil
• 2 drops peppermint essential oil
• 1 drop rosemary essential oil

Directions: Add essential oils to your diffuser with water as directed by the manufacturer. Diffuse in the morning or during focused work blocks. Avoid diffusing stimulating oils right before bed.

Citrus Herb Focus Inhaler

This easy inhaler is ideal for your purse, desk, homeschool cart, or car console.

• 13 drops rosemary essential oil
• 7 drops lemon essential oil

Supplies:

• Precut organic cotton pad
• Aromatherapy inhaler

Directions:

1. Place the cotton pad in the inhaler tube.
2. Drop the essential oils directly onto the cotton pad.
3. Secure the cap and store the inhaler where you can use it during the day.
4. Open the inhaler and take a few deep breaths through your nose when you need mental focus and clarity.

A Note on Seizures & Hypertension

This is a tough one because rosemary essential oil safety depends on chemotype, dose, route, age, health history, and personal sensitivity. A blanket “always avoid” or “always safe” answer is usually too simplistic.

Nonetheless, rosemary can be rich in camphor and 1,8-cineole, and these constituents deserve respect. A scientific review on essential oils and seizures notes that internal use of essential oils such as sage, hyssop, rosemary, camphor, pennyroyal, eucalyptus, cedar, thuja, and fennel can cause epileptic seizures because of constituents such as thujone, 1,8-cineole, camphor, or pinocamphone. (7)

Case reports have also described seizures associated with essential oil exposure, including eucalyptus and camphor oils, and topical exposure has been reported as a trigger in susceptible people. (8)

Nonetheless, virtually every blog that I see on the topic states that rosemary is contraindicated for epileptics and people prone to seizures. This is most likely due to the rich camphor levels in the oil, which can trigger seizures in some. You’ll want to use caution if this is something you or a loved one may be prone to.

“Long story short, a lot of the seizure lists floating around the internet are not accurate nor real pictures of the risks and threats. None of them seemingly account for species or chemotypes, which makes a difference in this matter. As far as a list of oils with convulsant properties, I would check essential oils safety expert Robert Tisserand’s work, but with the understanding that this list can no way give a complete risk profile because of the nature of epilepsy and other seizure disorders.”

The same message applies to hypertension. According to Tisserand “I believe that there is no case for contraindicating any essential oil in someone with high blood pressure. As well as closely examining the evidence above, I also refer to more recent research, which confirms that the four “Valnet oils” present no risk. The lack of compelling evidence is reason enough to let go of this chimera.” (9)

At the same time, rosemary has been studied for raising low blood pressure, so people with high blood pressure or cardiovascular disease should use it wisely and avoid aggressive internal or topical protocols without guidance.

Use extra caution with rosemary essential oil around infants and young children, especially rosemary chemotypes high in 1,8-cineole. Avoid applying rosemary oil on or near the face of infants and young children. Use conservatively during pregnancy, avoid casual high-dose ingestion, and discontinue use if you notice irritation, headache, dizziness, breathing discomfort, or unusual symptoms.

If seizures, hypertension, pregnancy, young children, medication use, liver disease, or active cancer care are areas of concern for you, please contact your physician before utilizing rosemary essential oil uses.

Rosemary Essential Oil FAQs

What is rosemary essential oil good for?

Rosemary essential oil is best known for memory, focus, hair and scalp support, stress resilience, liver and gallbladder support, circulation, and natural cleansing. Research supports several of these traditional uses, especially cognitive performance, cortisol reduction, hair growth in androgenetic alopecia, liver antioxidant protection in animal models, and blood pressure support in people with primary hypotension.

Can rosemary essential oil help hair growth?

Yes, rosemary essential oil may help support hair growth, especially in androgenetic alopecia. In one six-month randomized trial, rosemary oil performed similarly to 2% minoxidil for increasing hair count, and the rosemary group reported less scalp itching. (12) For best results, dilute it in a carrier oil and apply consistently to the scalp.

Is rosemary essential oil good for memory?

Yes, rosemary essential oil has research support for memory and alertness. One study found rosemary aroma improved quality of memory and secondary memory factors, and another found that blood levels of 1,8-cineole after rosemary aroma exposure correlated with cognitive performance. (3, 13)

Can rosemary essential oil help lower cortisol?

Rosemary aroma may help reduce stress-related cortisol. In one study, just five minutes of rosemary and lavender inhalation decreased salivary cortisol and increased free radical scavenging activity in volunteers. (6)

Can I apply rosemary essential oil directly to my scalp?

No. Rosemary essential oil should be diluted before scalp application. A simple option is 3 drops rosemary essential oil in 1 tablespoon carrier oil. Massage into the scalp, leave on for 20 to 30 minutes, then wash out. Stop using it if you develop redness, itching, burning, or irritation.

Can rosemary essential oil be used internally?

Rosemary essential oil can be used in tiny culinary amounts when the oil is high quality and labeled for food use, but internal therapeutic dosing should be approached carefully. Essential oils are concentrated. Avoid casual high-dose ingestion, especially if you are pregnant, managing seizures, using medications, or dealing with a serious health condition.

Does rosemary essential oil raise blood pressure?

Rosemary essential oil has traditionally been used for low blood pressure, and one clinical study found that rosemary oil helped raise blood pressure values in people with primary hypotension. (10) If you have high blood pressure or cardiovascular disease, use rosemary cautiously.

Who should avoid rosemary essential oil?

People with seizure disorders, infants and young children, pregnant women, people with uncontrolled hypertension, and anyone taking medications or managing a serious condition should use rosemary essential oil with extra caution. Avoid applying rosemary oil near the face of infants and young children.

What oils blend well with rosemary essential oil?

Rosemary blends well with lavender, lemon, orange, grapefruit, peppermint, pine, basil, eucalyptus, frankincense, cedarwood, and tea tree. Use rosemary with citrus and mint for focus, with lavender for stress support, with tea tree for cleansing, and with jojoba or coconut oil for scalp massage.

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