A classical formula used to strengthen the Kidneys and stop involuntary loss of Essence (such as seminal emission or leakage). It works like a 'golden lock' to secure the body's vital reserves, and is best suited for people who experience seminal emission, fatigue, lower back soreness, and tinnitus due to Kidney weakness. The formula combines gentle Kidney tonification with strong binding and astringent action.

In TCM theory, the Kidneys are responsible for storing Essence (Jing), the fundamental substance that supports growth, reproduction, and vitality. The Kidneys function like a sealed vault: they hold Essence securely so it is not lost without purpose. This sealing function is called the "Essence gate" (精关, jīng guān).

When the Kidneys become deficient, whether from overwork, chronic illness, ageing, or excessive sexual activity, they lose the strength to keep this gate firmly closed. Essence begins to leak out involuntarily, manifesting as spontaneous seminal emission, nocturnal emission (wet dreams), or in women, excessive vaginal discharge. Because Essence is the material basis for producing Qi, its chronic loss leads to fatigue, weakness in the limbs, and a general decline in vitality. Since the lower back is the "mansion of the Kidneys" and the ears are the Kidneys' sensory opening, Kidney depletion also produces lower back soreness and tinnitus. The pale tongue, white coating, and thin, weak pulse all reflect this underlying deficiency.

The formula addresses this by both mildly nourishing the depleted Kidneys and, more importantly, firmly astringing the Essence gate to stop the leakage. The Lotus Seed and Lotus Stamen components also calm the Heart and promote Heart-Kidney communication, which is relevant because mental restlessness or excessive dreaming (a Heart-level disturbance) can itself disturb the Essence gate and trigger nocturnal emissions.