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Rosemary aroma may improve memory and support brain waste removal

Health experts say rosemary compounds found in the herb and its oil could support memory, attention, and the brain's natural waste-removal process.

A nurse helps a patient in a wheelchair down a hospital corridor, reflecting care and medical professionalism.
File photo A nurse helps a patient in a wheelchair down a hospital corridor, reflecting care and medical professionalism. Photo: RDNE Stock project

Compounds linked to brain health

Researchers note that rosemary contains natural substances like 1,8-cineole, rosmarinic acid, and carnosic acid. These compounds have been linked to cellular health and the function of acetylcholine, a neurotransmitter involved in memory. Exposure to rosemary essential oil raised cineole levels in blood samples during a study.

Effects on cognitive performance

People exposed to the scent of rosemary showed improvements on specific cognitive tasks in published research. The aroma may help keep acetylcholine active longer to support communication between brain cells. Experts caution that eating the herb does not prove it can clear brain waste overnight.

Absorption with healthy fats

Using rosemary with extra-virgin olive oil may help extract beneficial fat-soluble compounds from the plant. This method could increase the availability of substances associated with brain and cellular health. Current evidence does not support claims that the herb prevents dementia or clears waste immediately.

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