Rosemary (Rosmarinus officinalis): Properties and Benefits

Rosmarinus officinalis L. / Rosemary, commonly known as rosemary, is a perennial aromatic shrub belonging to the family Lamiaceae. Native to the Mediterranean region, including Portugal and Spain, rosemary has been valued for millennia for its culinary, medicinal, and ornamental properties, and its presence in ancient texts, such as those of Dioscorides and Pliny the Elder, attests to its long history of use in traditional medicine and the culture of many civilizations. Its needle-shaped leaves and its flowers, which range from white to deep blue, give it a singular beauty and an unmistakable aroma.

In herbal tradition, rosemary is recognized as a general tonic, with applications ranging from improving digestion to relieving stress and anxiety. Its rich phytochemical composition, which includes rosmarinic acid, camphor, and carnosol, is responsible for its various pharmacological actions, such as antioxidant, anti-inflammatory, and antimicrobial properties, and modern scientific research continues to validate many of the traditional uses of rosemary, consolidating its reputation as a plant of great importance in phytotherapy.

Popular and International Names of Rosemary

• English: rosemary, garden rosemary.
• Spanish: romero, romero común.
• Portuguese: alecrim, alecrim-de-cheiro (BR), alecrim-do-jardim, rosmarinho (PT); alecrim-comum.
• French: romarin, romarin officinal.
• Italian: rosmarino, rosmarino comune.
• German: Rosmarin, Gartenrosmarin.

Botanical Synonyms of Rosmarinus officinalis

Rosmarinus officinalis L. is the most widely known and used scientific name in historical literature and in many contemporary references for designating rosemary. A recent taxonomic reclassification, based on phylogenetic studies, folded the genus Rosmarinus into the genus Salvia, resulting in the synonym Salvia rosmarinus Spenn., now considered the botanically accepted name, although the earlier designation is still widely recognized and used by the public and by industry.

Other synonyms include: Rosmarinus angustifolius Mill., Rosmarinus communis Noronha, Rosmarinus flexuosus Jord. & Fourr., Rosmarinus latifolius Mill., Rosmarinus ligusticus Gand., Rosmarinus palaui (O.Bolòs & Molin.) Rivas Mart. & M.J.Costa, Rosmarinus prostratus Mazziari, Rosmarinus rigidus Jord. & Fourr., Rosmarinus tenuifolius Jord. & Fourr., Salvia fasciculata Fernald.

Botanical Family: Lamiaceae

The Lamiaceae family, also known as Labiatae, is a vast and diverse family of flowering plants that includes about 236 genera and more than 7,000 species, characterized by square stems, opposite leaves, and bilabiate flowers that are often aromatic due to the presence of essential oils. Many of its species are of great economic, culinary, and medicinal importance, such as mint, sage, thyme, oregano, and basil, and rosemary, with its distinct aroma, is a prominent member of this family.

Parts of Rosemary Used

• Essential oil
• Flowers
• Leaves (fresh or dried)
• Woody stems

Ethnobotanical and Traditional Uses

• Improved blood circulation
• Improved digestion and relief of flatulence
• Memory and concentration stimulant
• Purification of the body and elimination of toxins
• Reduction of stress and anxiety
• Relief of headaches and migraines
• Relief of muscle and rheumatic pain
• Treatment of gastrointestinal disorders (dyspepsia)

Therapeutic Properties of Rosemary

• Analgesic (traditional use to relieve pain)
• Anti-inflammatory (studied effect in reducing inflammation)
• Antibacterial (studied activity against bacteria)
• Antifungal (studied activity against fungi)
• Antimicrobial (studied activity against microorganisms)
• Antioxidant (studied activity against free radicals)
• Antiproliferative (activity observed in laboratory studies, without clinical proof)
• Antispasmodic (traditional use to relieve muscle spasms)
• Antiviral (studied activity against viruses)
• Carminative (helps eliminate gas)
• Choleretic (studied effect on bile production)
• Hepatoprotective (studied protective effect on the liver)
• Neuroprotective (studied protective effect on the nervous system)
• Stimulant (studied effect on energy and vitality)

Detailed Phytochemical Profile of Rosemary

• Alpha-pinene
• Betulinic acid
• Caffeic acid
• Camphor (10-20% in the essential oil)
• Carnosic acid
• Carnosol
• Flavonoids (apigenin, diosmetin, luteolin)
• Rosmarinic acid
• Terpenes and terpenoids
• Ursolic acid

Preparation and Administration Forms of Rosemary

• Capsules
• Compresses
• Cream
• Dry extract
• Essential oil
• Fluid extract
• Infusion (tea)
• Poultice
• Tincture

Synergy with Other Medicinal Plants

Support for Memory and Concentration

The combination of rosemary with ginkgo (Ginkgo biloba) and bacopa (Bacopa monnieri) may enhance nootropic and neuroprotective effects, since the rosmarinic acid in rosemary, the flavonoids in ginkgo, and the bacosides in bacopa act synergistically to support cognitive function, memory, and concentration, and are traditionally used in cases of mental fatigue and mild cognitive decline.

The pairing of rosemary with arnica (Arnica montana) and white willow (Salix alba) is traditionally used, both topically and internally, for muscle pain, bruising, and joint inflammation. The anti-inflammatory compounds in rosemary, the helenalin in arnica, and the salicin in white willow provide synergistic relief of pain and inflammation, supporting muscle and joint recovery.

Digestive Support

Rosemary can be combined with peppermint (Mentha × piperita) and ginger (Zingiber officinale) to optimize digestive health, a synergy that is particularly useful for relieving dyspepsia, flatulence, and nausea. Rosemary acts as a carminative and antispasmodic, while peppermint and ginger contribute digestive and antiemetic properties, helping to ease gastrointestinal discomfort.

Recipes and Usage Protocols of Rosemary

Infusion to Support Digestion and Reduce Stress

Ingredients: 1 teaspoon of dried rosemary leaves (or 2 fresh sprigs), 200 ml of boiling water, honey or lemon (optional).

Preparation: Place the rosemary in a cup and add the boiling water. Cover and let steep for 5 to 10 minutes. Strain and, if desired, add honey or a few drops of lemon. Drink 1 to 2 cups a day, preferably after meals to support digestion, or in the evening to promote relaxation and reduce stress. This infusion is also traditionally used to ease tension headaches.

Massage Oil for Muscle and Joint Pain

Ingredients: 10 drops of rosemary essential oil, 30 ml of a base carrier oil (sweet almond, jojoba, or olive oil).

Preparation: In a dark glass bottle, mix the rosemary essential oil with the carrier oil. Shake well. Apply a small amount to clean skin over areas affected by muscle, rheumatic, or joint pain, massaging gently until absorbed. Use 2 to 3 times a day, as this oil helps reduce inflammation, relieve pain, and improve local circulation. Avoid direct sun exposure after application due to the photosensitizing potential of some components.

Tincture to Support Memory and Concentration

Ingredients: 50 g of chopped fresh rosemary leaves, 250 ml of 70% grain alcohol.

Preparation: Place the rosemary leaves in a sterilized glass jar and cover with the alcohol. Seal tightly and let macerate in a cool, dark place for 2 to 4 weeks, shaking daily. After the maceration period, strain the tincture through a fine cloth and store in a dark glass bottle. Take 20 to 30 drops diluted in a little water, 2 to 3 times a day, to support cognitive function, memory, and concentration, without exceeding the recommended dose.

Steam Inhalation for Nasal Congestion and Respiratory Issues

Ingredients: 2 tablespoons of dried rosemary leaves, 1 liter of boiling water.

Preparation: Place the rosemary leaves in a large bowl and add the boiling water. Cover your head with a towel and lean over the bowl, inhaling the steam for 5 to 10 minutes with your eyes closed. This steam inhalation helps clear the airways, ease symptoms of sinusitis, bronchitis, and colds, and can have an invigorating effect. Repeat 1 to 2 times a day, as needed.

The preparations above follow traditional records and do not replace professional guidance. Before any internal use, consult the contraindications and interactions described in this article.

The preparations above follow traditional records and do not replace professional guidance. Before any internal use, check the contraindications and interactions described in this article.

Associated Therapies

Aromatherapy

Rosemary essential oil is one of the most widely used oils in aromatherapy, recognized for its stimulating and invigorating properties. Inhalation of its aroma, through diffusers or diluted topical application, is used to improve concentration, reduce mental fatigue, and ease headaches, and it is also valued for its antiseptic and anti-inflammatory effects, often incorporated into massages to relieve muscle and joint pain. Rosemary aromatherapy can promote a state of alertness and overall well-being.

Clinical Phytotherapy

In clinical phytotherapy, rosemary is prescribed in various forms, such as standardized extracts, capsules, and tinctures, to support a range of conditions, and it is widely used for digestive support, liver function support, and as an antioxidant. Rosemary extracts are often standardized for rosmarinic acid and carnosol content, which seeks to ensure product consistency, and clinical phytotherapy employs rosemary as an adjuvant in cases of dyspepsia and fatigue and in anti-inflammatory and neuroprotective therapies, always based on scientific evidence and individualized treatment.

Homeopathy

In homeopathy, Rosmarinus officinalis is used in diluted preparations to address conditions such as rheumatic pain, circulatory problems, and certain forms of headache. Although less common than in phytotherapy, homeopathy values the properties of rosemary for specific symptoms, following the principle of similars, and it is often indicated for individuals who are sensitive to cold and whose pain worsens with movement. Its use in homeopathy aims to stimulate the body’s capacity for self-healing.

Contraindications and Side Effects of Rosemary

General Contraindications

Rosemary is generally safe when consumed in culinary amounts. However, at high therapeutic doses, its use is contraindicated for pregnant women, as it may have emmenagogue and abortifacient effects. Breastfeeding women and young children should avoid rosemary at medicinal doses due to a lack of adequate safety studies. Individuals with a history of seizures or epilepsy should use rosemary with caution, especially the essential oil, due to the presence of camphor, which can trigger seizures, and people with severe liver or kidney disease should consult a healthcare professional before using rosemary medicinally.

Common Side Effects

Side effects from rosemary are rare and generally mild when used correctly. In some people, excessive consumption of infusions can cause gastrointestinal irritation, nausea, or vomiting, and topical application of undiluted rosemary essential oil can cause skin irritation, contact dermatitis, or allergic reactions in sensitive individuals. It is crucial to dilute the essential oil in a carrier oil before applying it to the skin.

Drug Interactions

Rosemary may interact with certain medications. Due to its diuretic properties, it can potentiate the effect of diuretics, leading to an electrolyte imbalance, and it may also interfere with anticoagulant medications, such as warfarin, increasing the risk of bleeding, due to the presence of coumarins. Its stimulant action can interact with blood pressure medications, altering their effects, so individuals taking medications regularly should always consult a healthcare professional before starting any treatment with rosemary.

Historical Notes and Interesting Facts

Rosemary has been a symbol of remembrance and fidelity in various cultures. In Ancient Greece, students wore rosemary wreaths during exams to improve memory, and in the Middle Ages it was common for brides to wear rosemary in their bouquets as a symbol of love and loyalty. In some cultures, sprigs of rosemary were placed under pillows to ward off nightmares and promote restful sleep, and the plant was also burned in purification rituals and to drive away negative energies. Its association with memory is so strong that Shakespeare, in Hamlet, has Ophelia say:

“There’s rosemary, that’s for remembrance; pray, love, remember.” The “Hungary Water,” one of the first alcohol-based perfumes in Europe, dating from the 14th century, was made mainly from distilled rosemary and was attributed to Queen Elizabeth of Hungary, who supposedly regained her youth and beauty through its use.

Frequently Asked Questions about Rosemary

Can Rosemary Be Used During Pregnancy?

Using rosemary at high therapeutic doses during pregnancy is not recommended, due to its potential emmenagogue effect, which can stimulate uterine contractions. Occasional consumption in small culinary amounts is generally considered safe, but medical consultation is always advised.

What Are the Benefits of Rosemary for Memory?

Rosemary is traditionally known for improving memory and concentration. Studies suggest that compounds such as rosmarinic acid and camphor may have neuroprotective effects and stimulate cognitive function, increasing cerebral blood flow and protecting neurons.

Does Rosemary Help With Digestion?

Yes, rosemary has carminative and antispasmodic properties that support digestion, easing symptoms such as flatulence, bloating, and cramps. It can be consumed as an infusion after meals to facilitate the digestive process.

Is There Any Important Drug Interaction With Rosemary?

Yes, rosemary can interact with anticoagulant medications (such as warfarin), diuretics, and sedatives, potentiating their effects. It is essential to consult a healthcare professional before using rosemary medicinally, especially if you are taking other medications.

How Should I Store Rosemary to Preserve Its Properties?

Dried rosemary leaves should be stored in airtight containers, made of glass or metal, in a cool, dark, and dry place, protected from light and moisture. When stored properly, dried rosemary can retain its properties for up to a year.