Wei QiImmunityDefensive QiAcupunctureHerbal MedicineTCM Theory
Wei Qi and Immunity: TCM's Defensive System Explained
Medically Reviewed by Derek Doran, BHSc (Acupuncture) · AHPRA Registered · AACMA Member · Updated April 13, 2026
April 13, 202610 min readBy MediChi Editorial
Checking your access and loading content
Verifying your Medi-Chi access…
Frequently Asked Questions
What is Wei Qi in Traditional Chinese Medicine?
Wei Qi (衛氣) is the defensive Qi that circulates on the surface of the body, protecting against external pathogens like wind, cold, and heat. It is analogous to the innate immune system in Western medicine and is generated primarily by the Lung and Spleen organ systems.
How does acupuncture strengthen the immune system?
Research shows acupuncture modulates immune function through neuro-immune pathways, increasing natural killer (NK) cell activity, regulating T-cell subsets, and modulating inflammatory cytokines like IL-10 and TNF-α. Key points such as ST36 (Zusanli) and LI4 (Hegu) are particularly well-studied for immune enhancement.
Which acupuncture points boost Wei Qi?
The primary points for strengthening Wei Qi include ST36 (Zusanli), LU7 (Lieque), LI4 (Hegu), BL13 (Feishu), GV14 (Dazhui), and CV6 (Qihai). These points tonify the Lung and Spleen, which are the organs responsible for generating and distributing defensive Qi.
What herbs strengthen Wei Qi?
The classic formula Yù Píng Fēng Sǎn (Jade Windscreen Powder) — containing Huáng Qí (Astragalus), Bái Zhú (Atractylodes), and Fáng Fēng (Saposhnikovia) — is the principal formula for tonifying Wei Qi. Astragalus alone has extensive research supporting its immunomodulatory properties.
All Citations Verified5/5
Every PubMed citation in this article has been manually verified against its source.
💡 💡 Tip: Press and hold on citation links to open them in your browser.
Derek Doran, BHSc (Acupuncture)
AHPRA Registered (CMR0002211465) · AACMA Member
Derek is the founder of MediChi and a registered acupuncturist with clinical expertise in integrating Western diagnoses with Traditional Chinese Medicine treatment protocols.
Clinically reviewed: April 13, 2026
