Rosemary (Rosmarinus officinalis) has a history of use in traditional medicine for enhancing memory and cognitive function, but its potential to support the "Smell" body system—interpreted as olfactory function—has also been the subject of some scientific inquiry. Several studies have investigated the effects of rosemary essential oil and its primary constituents, such as 1,8-cineole, on olfactory stimulation and brain function. The inhalation of rosemary aroma has been shown in some small studies to increase alertness, improve mood, and even enhance aspects of memory performance, suggesting a link between rosemary’s scent and neurological processes.

However, direct evidence that rosemary specifically supports or restores the sense of smell (olfaction) is limited. Most scientific literature focuses on rosemary’s cognitive and mood effects when its aroma is inhaled, rather than on treatment or enhancement of the olfactory system itself. Therefore, while there is a reasonable scientific basis for the claim that rosemary scent interacts with the brain via olfactory pathways and may temporarily affect cognitive states, the evidence for rosemary as a remedy for smell disorders or as a direct supporter of olfactory health is moderate at best.

In summary, rosemary is scientifically recognized for its neurologically active aroma, but its direct benefits for the "Smell" body system are supported by limited and indirect evidence.