

Natural Immunity
This formula creates strong immunity for those with struggling immune systems. For young children always fighting off disease, to basic hayfever, and cancer patients who are immuno-compromised as a result of treatment, nothing helps sickly people return to health more effectively than this formula.

INGREDIENTS
Each pill contains the equiv. to dry:
Milk Vetch, root 187.5mg
White Atractylodes, root 112.5mg
Siler, root 75mg
Store below 30°C
Contains 200 x 200mg pills.
AUSTL 483085
Made in Australia.
Indications: weakened or compromised immunity, regularly catching colds or flu, allergies.
Actions: support and strengthen the immune system.
Dosage: 12 pills 2 times per day. Take any time. Take for 3 months.
Children: 6 months an over 1 pill per year of age up to the age of 10 as directed above.
Treat more, not less. Treat sooner, rather than later.
Yu Ping Feng San – "Immunity"
Don't Wait Until You're Sick
A classical Chinese herbal formula traditionally used to strengthen the body's natural defences, helping build long-term immune resilience and reduce susceptibility to recurrent illness.
Stop Waiting Until You Get Sick
Every autumn...
Every winter...
Every school term...
Millions of people wait until they become sick before thinking about their immune system.
The first sniffle appears.
The sore throat follows.
The cough begins.
Only then do we ask:
"What can I take to get rid of this?"
Chinese medicine asks a completely different question.
Instead of asking, "How do I get over this infection?"
it asks, "How do I stop getting sick in the first place?"
That simple change in thinking has guided Chinese medicine for more than seven hundred years.
Yu Ping Feng San is the greatest example of that philosophy.
At Chiron Medical we simply call it "Immunity."
Because unlike almost every other herbal formula, its purpose is not to treat disease.
Its purpose is to help build a healthier, more resilient person.
Health Is Built Between Illnesses
Most healthcare begins after something goes wrong.
A fever develops.
A cough appears.
A child misses school.
An adult misses work.
Treatment begins.
Yu Ping Feng San works differently.
It is traditionally taken between illnesses.
During the weeks and months when you are well.
Its goal is simple.
To help prepare the body before the next challenge arrives.
This preventative philosophy has been one of the foundations of Chinese medicine for centuries.
A Formula with More Than 700 Years of History
Yu Ping Feng San first appeared in the Shi Yi De Xiao Fang (Effective Prescriptions of Generations of Physicians) during the Yuan Dynasty in the 14th century.
Its name means:
"Jade Screen Powder."
Just as a windscreen protects us from the wind without stopping us from moving forward, this formula was designed to strengthen the body's natural protective barrier while allowing us to live normal, healthy lives.
For over seven hundred years it has remained one of Chinese medicine's most respected formulas for building immune resilience.
Why We Call It "Immunity"
Every other infection formula in the Chiron Medical collection has a job to do once illness begins.
Yu Ping Feng San is different.
Its role begins long before the first symptom appears.
It is traditionally prescribed for people who:
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catch frequent colds
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seem to catch every virus
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recover slowly
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experience repeated respiratory infections
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become sick every winter
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never quite regain full health after illness
Its purpose is not to replace the immune system.
Its purpose is to help it perform better.
Breaking the Cycle of Recurrent Illness
Some people become trapped in what feels like an endless cycle.
They catch a virus.
Recover.
Then catch another.
Each illness leaves them just a little weaker.
Parents know this cycle well.
One child becomes sick at school.
They recover...
only to bring home the next virus a fortnight later.
Adults experience the same pattern.
"I've been sick all winter."
"I finally got over one cold...
...then caught another."
Traditional Chinese Medicine recognised this pattern centuries ago.
It teaches that every illness places demands on the body's Defensive Qi (Wei Qi).
If those protective reserves are never fully restored, susceptibility gradually increases.
The body doesn't become weaker overnight.
It slowly loses resilience.
Yu Ping Feng San was designed to rebuild it.
Building an Immune System, Not Fighting an Infection
One of the greatest strengths of Yu Ping Feng San is that it changes the focus entirely.
Instead of asking, "How do I fight today's infection?"
it asks, "How do I become healthier before the next infection arrives?"
That philosophy feels remarkably modern.
Because today's research increasingly recognises that immune health isn't simply about destroying bacteria or viruses.
Healthy immunity depends upon:
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resilient barrier tissues
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balanced inflammation
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healthy gut function
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efficient immune communication
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rapid recovery after infection
The goal is not a stronger immune system.
The goal is a better regulated immune system.
The Herbs That Make the Formula
Despite containing only three herbs, Yu Ping Feng San is regarded as one of Chinese medicine's most elegant prescriptions.
Huang Qi (Astragalus Root)
Traditional role
The principal herb.
Strengthens Defensive Qi and builds the body's resistance to external disease.
Biomedical actions
Research demonstrates:
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immunomodulatory activity
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enhanced macrophage function
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increased natural killer cell activity
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antioxidant effects
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support for respiratory immune defence
Bai Zhu (Atractylodes Rhizome)
Traditional role
Strengthens digestion, allowing the body to efficiently produce the energy required for healthy immunity.
Biomedical actions
Research suggests:
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improved intestinal barrier integrity
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modulation of the gut microbiome
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enhanced nutrient absorption
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immune regulation
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anti-inflammatory activity
Fang Feng (Saposhnikovia Root)
Traditional role
Strengthens the body's outer protective barrier while defending against external pathogens.
Biomedical actions
Research demonstrates:
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immunomodulatory activity
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regulation of inflammatory cytokines
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antioxidant activity
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support for immune readiness
The Skin—Your First Immune Organ
Long before immune cells were discovered, Chinese physicians taught that Defensive Qi (Wei Qi) travelled just beneath the skin.
Its role was to:
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protect the body from invading pathogens
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regulate sweating
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control the opening and closing of the pores
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defend the body's surface
Modern immunology has revealed something remarkable.
The skin is now recognised as one of the body's largest immune organs.
Within the skin and the underlying fat layer live millions of specialised immune cells—including macrophages, dendritic cells, mast cells and tissue-resident lymphocytes—that constantly patrol the body's surface for invading bacteria and viruses.
The language has changed.
The biology has become clearer.
But the underlying principle remains strikingly familiar.
Our first line of defence lives at the surface of the body.
Yu Ping Feng San was designed to strengthen that first line of defence centuries before anyone knew immune cells existed.
What Does Modern Research Say?
Yu Ping Feng San is now one of the most extensively researched immune-supportive formulas in Chinese medicine.
Research has investigated its role in:
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recurrent respiratory infections
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recurrent childhood infections
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allergic rhinitis
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post-viral recovery
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seasonal immune support
Studies suggest the formula may support:
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innate immune responses
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mucosal immunity
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natural killer cell activity
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macrophage function
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gut-immune communication
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respiratory barrier function
These findings closely reflect the traditional concept of strengthening Defensive Qi.
Comparing the Chiron Medical Immunity & Infection Formulas
Yu Ping Feng San - Immunity - Building immune resilience before illness develops - Strengthens the body's natural protective defences
Gui Zhi Tang - Colds, Shivers & Sniffles - First signs of a cold - Supports the body's earliest immune response
Yin Qiao San- No.1 Fever & Flu - Early fever and sore throat - Clears early Heat and supports antiviral defence
Sang Ju Yin - New Cough - Early cough - Protects the lungs as infection progresses
Yang Yin Qing Fei Tang - Throat Infection - Significant throat inflammation - Protects and repairs inflamed throat tissues
Chuan Xin Lian Jie Du Tang - Break High Fever - Severe febrile illness - Supports the body during intense systemic inflammation
For Traditional Chinese Medicine Practitioners
Classical Pattern
Wei Qi Deficiency secondary to Lung and Spleen Qi Deficiency
Typical presentation:
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recurrent respiratory infections
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spontaneous sweating
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aversion to wind
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frequent colds
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fatigue
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pale tongue
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weak pulse
Formula Strategy
Yu Ping Feng San:
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Tonifies Lung Qi.
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Strengthens Spleen Qi.
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Consolidates Wei Qi.
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Stabilises the exterior.
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Improves resistance to recurrent external pathogens.
For Medical Doctors
Proposed Biomedical Actions
Current evidence suggests the constituent herbs influence:
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innate immune function
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mucosal immunity
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macrophage activity
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natural killer cell function
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cytokine regulation
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epithelial barrier integrity
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gut-immune interactions
Rather than functioning as an antimicrobial agent, the formula appears to improve the efficiency and regulation of the host immune response.
Clinical monitoring is appropriate in patients taking immunosuppressive therapies or biologic immune modulators. The formula is intended to complement—not replace—vaccination, adequate nutrition, exercise, sleep and evidence-based medical care.
A Different Philosophy of Healthcare
Most healthcare asks:
How do we treat disease?
Yu Ping Feng San asks something far more powerful:
How do we build health so disease finds fewer opportunities to take hold?
That simple shift in thinking has allowed this remarkable three-herb formula to remain one of the cornerstones of Chinese medicine for more than seven centuries.
That is why it is my favourite formula.
Not because it fights infection better than any other.
But because it reminds us that the greatest victory over disease is not always recovery...
I'd prefer never becoming sick in the first place.
Clinical Insights
Building Long-Term Resilience Alongside Targeted Treatment
One of the greatest strengths of Yu Ping Feng San (Immunity) is that it is rarely prescribed in isolation for chronic disease.
Experienced practitioners frequently combine it with other formulas to address two important goals simultaneously:
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Treat the active condition.
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Strengthen the underlying constitution so the problem becomes less likely to recur.
While another formula manages the immediate symptoms, Yu Ping Feng San helps rebuild the body's natural defensive capacity, particularly in people whose immune resilience has been reduced by recurrent illness, chronic inflammation or prolonged recovery.
Rather than simply treating today's symptoms, this approach aims to break the cycle of repeated illness by improving the body's ability to recover fully and respond more effectively to future challenges.
Common Clinical Combinations
Hayfever and Allergic Rhinitis
Many people experience seasonal hayfever year after year because the underlying susceptibility remains unchanged.
During active symptoms, practitioners commonly combine Yu Ping Feng San with:
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Xin Yi San (Hayfever) — to relieve nasal congestion, sneezing and allergic rhinitis.
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Bi Min Gan Tang (Sinus Infection) — when chronic sinus inflammation or allergic sinus congestion predominates.
Once symptoms settle, Yu Ping Feng San is often continued to help improve immune resilience before the next allergy season.
Chronic Dry Cough
Persistent dry cough frequently continues long after the original infection has resolved.
In these cases, practitioners often combine:
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Bai He Gu Jin Tang (Dry Cough) — to restore moisture and repair irritated lung tissue.
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Yu Ping Feng San (Immunity) — to reduce susceptibility to recurrent respiratory infections during recovery.
Chronic Ear, Nose and Throat Conditions
Repeated ENT infections often indicate that inflammation has resolved incompletely or the body's natural defences have not fully recovered.
Depending on the presentation, Yu Ping Feng San may be combined with:
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Yang Yin Qing Fei Tang (Throat Infection) — for chronic or recurrent throat inflammation.
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Long Dan Xie Gan Tang (Liver Fire) — where persistent inflammatory Heat affects the ears, throat or surrounding tissues.
The aim is to address both the active inflammatory pattern and the constitutional weakness that allows the condition to recur.
Asthma
Asthma changes considerably between acute attacks and periods of remission.
Yu Ping Feng San is most valuable during the remission stage, where the goal is to improve long-term respiratory resilience.
It may be combined with:
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Er Chen Tang (Phlegm Buster) — during acute cold-induced asthma with wheezing and excess mucus.
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Xiao Chai Hu Tang (X-Factor) — when attacks are triggered or prolonged following viral illness.
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Fu Gui Ba Wei Tang (Warm the Cockles) — during remission where chronic Yang deficiency contributes to recurrent respiratory weakness.
Chronic Bronchitis and Emphysema
Following resolution of acute infection, rebuilding respiratory resilience becomes increasingly important.
Practitioners may combine Yu Ping Feng San with:
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Er Chen Tang (Phlegm Buster) — chronic bronchitis during remission.
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Xue Fu Zhu Yu Tang (Clear the Way) — when impaired circulation contributes to chronic lung disease.
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Mai Wei zdi Huang Tang (Chronic Dry Lung) - when long-standing dryness rules the lungs.
Recurrent Childhood Infections
Children who experience repeated ear infections, sinus infections or upper respiratory illnesses often benefit from treatment directed at both the active infection and their underlying constitutional resilience.
Examples include:
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Xin Yi San (Hayfever) — recurrent sinusitis.
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Bi Min Gan Tang (Sinus Infection) — chronic nasal congestion.
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Xiao Chai Hu Tang (X-Factor) — recurrent middle ear infections following viral illness.
Yu Ping Feng San is frequently introduced between infections to support long-term immune development.
Chronic Fatigue and General Debility
Repeated illness can gradually reduce physical resilience.
Patients often report:
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persistent fatigue
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poor exercise tolerance
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frequent viral illness
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prolonged recovery
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low energy
Yu Ping Feng San is commonly combined with constitutional tonic formulas such as:
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Bu Zhong Yi Qi Tang (Energy Pills) — where Qi deficiency predominates.
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Shi Quan Da Bu Tang (Restore the Blood) — following prolonged illness or blood deficiency.
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Liu Wei Di Huang Tang (Water of Life) — where constitutional Yin deficiency delays recovery.
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Fu Gui Ba Wei Tang (Warm the Cockles) — where Yang deficiency contributes to chronic coldness and poor vitality.
Chemotherapy Recovery
Patients recovering from chemotherapy frequently experience reduced immune resilience due to suppression of bone marrow function and white blood cell production.
Under the supervision of an appropriately qualified practitioner, Yu Ping Feng San may be considered alongside:
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Bu Zhong Yi Qi Tang (Energy Pills) — to support recovery of Qi and immune function.
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Shi Quan Da Bu Tang (Restore the Blood) — where rebuilding Blood and constitutional strength is the primary goal.
These combinations should always be coordinated with the patient's oncology team.
Recurrent Urinary Tract Infections
For patients who experience repeated urinary tract infections, treatment often involves both addressing the acute infection and reducing the likelihood of recurrence.
Yu Ping Feng San may be combined with:
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Ba Zheng San (Die UTI) — during appropriate stages of recovery in patients with recurrent urinary tract infections.
The Chiron Medical Philosophy
One of the defining characteristics of Chinese medicine is that treatment does not end when symptoms disappear.
Experienced practitioners often ask a second question:
"Why did this person become susceptible in the first place?"
Yu Ping Feng San helps answer that question.
Rather than chasing one infection after another, it supports the body's ability to recover, adapt and become more resilient over time.
For this reason, many practitioners consider it not simply an immune-support formula, but one of the great constitutional medicines of Chinese herbal practice—a formula whose greatest value lies not in treating today's illness, but in helping patients move from repeated sickness back towards lasting health.

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