Flatstem Milkvetch Seed

Traditional Use

Primary Actions

• Tonifies Kidney yang and secures essence - Sha Yuan Zi is a classic deficiency herb for spermatorrhea, urinary frequency, weakness of the lower back, and reproductive leakage patterns.
• Nourishes the Liver and improves vision - traditional use extends to dim vision or blurred sight when Liver-Kidney deficiency rather than acute excess is the root.
• Stabilizes the lower burner gently - compared with harsher astringents, it secures without being excessively drying or mineral-heavy.

Secondary Actions

• Sha Yuan Zi is especially useful when leakage and weakness coexist, because it both supplements and secures rather than simply astringing.
• Its warm, sweet, seed-based nature makes it relatively gentle, so it often appears in long-term deficiency formulas.

Classic Formulas

• Traditional Kidney-deficiency formulas pair Sha Yuan Zi with Tu Si Zi, Fu Pen Zi, or Qian Shi for essence leakage and urinary frequency.
• Vision-support combinations use Sha Yuan Zi with Gou Qi Zi and Ju Hua when deficiency affects the eyes.
• Reproductive-tonic strategies often combine it with Du Zhong, Ba Ji Tian, or Gou Ji when low-back weakness and sexual debility are prominent.

Classical References

• Traditional herbology classifies Sha Yuan Zi as sweet and warm, entering the Kidney and Liver to supplement deficiency, secure essence, and brighten the eyes.
• It is one of the gentler seed tonics used for leakage patterns, especially when stronger hot yang tonics would be too forceful.
• Because it both tonifies and secures, it fits chronic deficiency formulas better than short-term symptomatic strategies.