Rosemary Oil: Benefits, Uses, and What the Research Suggests

What Is Rosemary Oil?

Rosemary oil is an aromatic oil derived from the leaves of Rosmarinus officinalis, a fragrant evergreen herb. Loved for its crisp, herbaceous scent, it has been a favorite in hair care, massage, and aromatherapy for generations.

What Does It Do?

Rosemary oil is traditionally used to support the look and feel of healthy hair and scalp, and its invigorating aroma is popular in aromatherapy and massage routines.

Common Uses

• Hair and scalp massage (diluted with a carrier oil)
• Aromatherapy and diffuser blends
• Relaxing massage routines
• DIY hair-care preparations

What the Research Suggests

Rosemary oil has been studied for its aromatic compounds and topical hair-and-scalp applications. Research is ongoing and results vary.

• View study: Rosemary oil and hair care (PubMed)
• View study: Rosmarinus officinalis review (PubMed)

A Note on Use

Rosemary oil is for topical and aromatherapy use. Always dilute with a carrier oil before applying to skin, and do a patch test first.

Explore Rosemary Oil Products

Browse our Rosemary Oil collection, including single-ingredient rosemary oil and our rosemary and castor oil blend. Have questions? Visit our FAQ page.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Explore the Dr. Herbalist range

Rosemary Oil 120mL · Rosemary & Castor Oil Blend 120mL

Frequently Asked Questions

What is rosemary oil used for? Rosemary oil is a favorite for hair and scalp routines, aromatherapy, and massage; always dilute before applying to skin.

How do I use rosemary oil for hair? Mix a few drops with a carrier oil, massage into the scalp, and do a patch test first.

Can I use rosemary oil every day? Many people use a diluted scalp massage a few times a week; it is for external use only.