Yu Ping Feng San acts to enhance the defense. Literally the name means Jade Screen, as if it forms a solid screen to protect the body. In many controlled clinical trials, Yu Ping Feng San is shown to significantly reduce the frequency of the common cold and bacteria infection in the respiratory tract in people who have chronic bronchitis or children who are susceptible to the cold or flu.1†
Modern biomedical researches attribute the defense against the pathogens to the function of the immune system. The immune defense requires immunoglobulins (Ig), T lymphocytes, microphages, cytokines like interferons etc.. Researches have been conducted to test whether Yu Ping Feng San regulates the immune function. Indeed, in cultured murine macrophages Yu Ping Feng San was found to modulate the release of cytokines.2
Yu Ping Feng Wan is indicated in China Pharmacopoeia3 to invigorate the vital energy to strengthen the body surface resistance and to stop perspiration. It is used for deficiency of the superficies to protect the body against diseased, spontaneous perspiration and aversion to wind, pale complexion or general dibility and susceptibility to wind- pathogen.†
Yu Ping Feng Wan was the basic herbal formula recommended by Chinese health authorities to the public to enhance immune function several years ago when SARS occured in China.
| Radix Astragali Membranacei |
Radix Saposhnikoviae Divaricatae
Rhizoma Atractylodis Macrocephalae
| (Huang Qi) |
The dose may be doubled for a quicker and stronger response as needed (e. g., in an acute phase or with heavy body weight).
As the herbal formula is a mild tonic, results may only be noticeable after 1 month. It is suggested to take 4 to 6 bottles in full dose as the first regimen. The dose may then be reduced.