Mountain Bilberry (Vaccinium myrtillus), also known simply as bilberry, has a long history of traditional use in supporting the senses, particularly vision. Herbalists and natural medicine practitioners have advocated bilberry for eye health since at least World War II, when British pilots reportedly consumed bilberry jam to improve their night vision. This traditional belief has underpinned its use in various supplements targeting the "Senses" body system, especially for eye health and vision support.

The traditional justification is largely based on the presence of anthocyanins, potent plant pigments that are thought to support microcirculation in the eyes and reduce oxidative stress. Some early laboratory and animal studies suggested that bilberry extracts might help protect retinal cells and improve visual function. However, robust clinical evidence in humans remains limited and somewhat inconsistent. While a few small studies have hinted at potential benefits for night vision or eye fatigue, more recent and larger clinical trials have generally failed to confirm significant effects.

In summary, the use of mountain bilberry to support the Senses body system is primarily rooted in tradition, with moderate evidence from historical use and some preliminary scientific findings, but without strong or consistent clinical validation in modern research.