A lot of nerve-support products focus entirely on the nerves themselves and forget about what feeds them — blood flow.
Nerve cells, like every other cell, rely on blood to bring in oxygen and nutrients and carry waste away. Peripheral nerves — the ones running out to your hands and feet — are the farthest from the heart, which makes them the most vulnerable when circulation slows down.
Gravity doesn't do the legs and feet any favors. Blood has to work harder to make the return trip up from the lower extremities, which is part of why circulation-related discomfort often shows up there before anywhere else.
This is exactly the gap butcher's broom is meant to fill in Quiet Nerves' formula — a botanical with a long history of use for supporting healthy blood flow specifically in the lower limbs, rather than circulation in general.