Zuo Gui Yin Tang 左歸飲湯

Fill the Sea of Essence

Zuǒ Guī Yǐn Tāng — the Restore the Left Kidney Decoction — is Si Jin Bao’s rendering of Zhang Jing-yue’s classical formula for nourishing the true Yin of the Kidney: replenishing the Essence and marrow the Kidney stores, without draining what it works to fill.

In Zhang Jing-yue’s framework, the “left” Kidney holds Water and Yin. When that true Yin runs low, the Essence (Jīng) and marrow it stores thin — and the body shows it: a dry mouth and throat, night sweats, a sore and weak lower back, dizziness, tinnitus, and leakage the depleted Kidney can no longer hold. This decoction fills that sea directly. Si Jin Bao also notes it for the atrophy-type weakness (Wěi syndrome) of Liver and Kidney deficiency.

From Zhang Jing-yue’s Complete Works

The formula appears in the Jǐng-Yuè Quán Shū — the Collected Treatises of Zhang Jing-yue — the Ming physician’s 1624 compendium. Zhang set down two companion formulas: Zuǒ Guī to restore the Kidney’s Yin, and Yòu Guī to restore its Yang. Built on the Yin-nourishing core of the six-ingredient Rehmannia tradition, Zuǒ Guī Yǐn sets aside the draining members and adds Gǒu Qǐ Zǐ and honey-fried licorice — a purer tonic that fills without purging.

Kidney Yin & Essence Deficiency · 腎陰精虧

The pattern is a depleted Kidney Yin and Essence — the sea run low. It shows as dryness and heat from insufficiency, as weakness in the lower back and knees, and as leakage the Kidney can no longer contain. When Liver and Kidney no longer nourish the sinews and bones, atrophy and weakness may follow.

Classical tongue & pulse: a red tongue with a scanty coating; a fine (thready) pulse, sometimes rapid.

Six Herbs: Fill, Secure, Harmonize

Shú Dì Huáng richly nourishes the Kidney Yin and supplements the Essence — the herb that fills the sea. Gǒu Qǐ Zǐ enriches Liver and Kidney Yin and the essence-blood and brightens the eyes, while Shān Zhū Yú astringes and secures the Essence, holding in what is being replenished — checking the night sweats, the emissions, and the bleeding.

Shān Yào tonifies the Spleen and Kidney and secures the Essence, anchoring the nourishment in the body’s foundations. Fú Líng gently strengthens the Spleen and drains a little Dampness, so the rich, enriching herbs are absorbed without cloying. And Zhì Gān Cǎo harmonizes the formula and supports the Spleen, so the whole is well received. Fill, and then hold what has been filled.

When to Reach for It