Cuscuta Seed (The Yang Tonic)
Also Known As: Tu Si Zi, Dodder Seed, Cuscuta Chinensis
Compound Type: TCM Herb / Kidney Yang Tonic / Reproductive Support
Cuscuta Seed, known in Traditional Chinese Medicine (TCM) as Tu Si Zi, is a parasitic vine seed that has been used for thousands of years to treat “Kidney Yang Deficiency.” In TCM terms, the Kidneys control the reproductive system.
Unlike vasodilators that force blood in, Cuscuta is used to prevent leakage. It is traditionally prescribed for men suffering from spermatorrhea (involuntary ejaculation), premature ejaculation, and frequent urination. It strengthens the “gate” mechanism of the reproductive organs.
How Does Cuscuta Help Size?
It supports the structural integrity of the reproductive system and boosts seminal volume, which can lead to a “fuller” feeling flaccid hang.
The Science: Flavonoids & Fertility
1. Sperm Parameters:
A study published in the Journal of Ethnopharmacology demonstrated that Cuscuta seed extract significantly improved sperm motility and membrane integrity. By protecting the sperm cells from oxidative stress, it improves overall fertility and load volume.
2. Testosterone Protection:
While not a massive testosterone booster itself, research suggests Cuscuta helps protect the reproductive organs from chemical damage and stress, maintaining optimal function of the Leydig cells (where T is made).
3. The “Locking” Effect:
In the PE community, Cuscuta is often used during “Stamina Training.” Its traditional use for stopping leakage makes it a valuable tool for men learning to control their arousal levels during edging or jelqing.
Pair it with Goji.
In almost every ancient text, Tu Si Zi (Cuscuta) is paired with Gou Qi Zi (Goji Berry). This combination is believed to balance Yin and Yang, preventing the “dryness” or overheating that can come from taking Yang tonics alone.
✔ The Verdict: CONTROL AGENT
3/5 Stars. This is a “Utility” herb. If you suffer from premature ejaculation or feel like you are “leaking” energy, Cuscuta is the fix. It tightens up the system.
1,000mg – 1,500mg
(10:1 Extract)
Daily
Safety Profile & Side Effects
- Constipation: It can be slightly binding in the gut.
- Over-stimulation: As a Yang tonic, it may increase body heat or restlessness in sensitive users.
- None Major: Generally considered very safe, but avoid if you have a fever or active infection (as it “locks” things in).
Data source: Examine / PubMed



